SYSTEM SAFETY RULES

Transcription

SYSTEM SAFETY RULES

SYSTEM SAFETY RULES
IR.GN.01
Effective Date :
Procedure #: IR.GN.01
Issue: 2
Revision: 0
Page 2 of 144
Approved by:
Managing Director
TABLE OF CONTENTS
STATEMENT OF POLICY, PHILOSOPHY AND PRINCIPLES .................................................................... 5
1.
COMPANY SAFETY POLICY ............................................................................................................... 5
2.
GENERAL PHILOSOPHY OF THE SYSTEM SAFETY RULES .................................................................... 5
3.
ESSENTIAL PRINCIPLES OF THE SYSTEM SAFETY RULES..................................................................... 6
GENERAL PROVISIONS...................................................................................................................... 8
1‐
APPLICATION OF RULES ................................................................................................................... 8
2‐
GENERAL SAFETY ............................................................................................................................. 8
3‐
SYSTEM SAFETY RULES, INSTRUCTIONS AND PROCEDURES.............................................................. 8
4‐
SPECIAL INSTRUCTIONS ................................................................................................................... 9
5‐
OBJECTIONS FOR SAFETY REASONS ................................................................................................. 9
DEFINITIONS................................................................................................................................... 10
THE BASIC SYSTEM SAFETY RULES .................................................................................................. 17
1‐
SAFETY PRECAUTIONS WHEN APPROACHING EXPOSED CONDUCTORS AND INSULATORS ..............17
2‐
SAFETY PRECAUTIONS FOR WORK ON OR NEAR TO HIGH VOLTAGE EQUIPMENT ...........................21
3‐
SAFETY PRECAUTIONS FOR WORK ON OR NEAR TO LOW VOLTAGE EQUIPMENT ............................24
4‐
SAFETY PRECAUTIONS FOR WORK ON OR NEAR TO MECHANICAL EQUIPMENT ..............................26
5‐
BOUNDARY IDENTIFICATION OF SAFE WORKING AREAS .................................................................27
6‐
WORK AND DEMARCATION IN SUBSTATIONS.................................................................................28
7‐
IDENTIFICATION OF EQUIPMENT ....................................................................................................30
8‐
OPERATION OF EQUIPMENT...........................................................................................................30
SAFETY DOCUMENT PROCEDURES.................................................................................................. 31
1‐
GENERAL ........................................................................................................................................31
2‐
APPLICATION..................................................................................................................................31
3‐
SAFETY PRECAUTIONS ‐ PERMIT TO WORK .....................................................................................31
4‐
SAFETY PRECAUTIONS ‐ PERMIT TO WORK (Mechanical) ................................................................32
5‐
SAFETY PRECAUTIONS ‐ PERMIT TO WORK (Low Voltage)...............................................................33
6‐
SAFETY PRECAUTIONS – SANCTION FOR TEST .................................................................................34
7‐
SAFETY PRECAUTIONS – LIMITED ACCESS PERMIT ..........................................................................34
8‐
PREPARATION, ISSUE AND RECEIPT OF SAFETY DOCUMENTS..........................................................35
9‐
CLEARANCE OF SAFETY DOCUMENTS..............................................................................................36
This Document is the property of ADDC, and cannot be used nor given to outside party without prior authorisation. Print outs from soft copies are
Uncontrolled, unless stamped in red as “Controlled Copy”
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10‐
CANCELLATION OF SAFETY DOCUMENTS ........................................................................................38
11‐
RETURN TO OPERATIONAL SERVICE................................................................................................38
12‐
PROCEDURE FOR THE USE OF THE RECORD OF INTER‐SYSTEM SAFETY PRECAUTIONS (RISSP).........39
13‐
SAFETY CLEARANCE DE‐CLEARANCE CERTIFICATE (Announcement of Application of SSR) ...............41
14‐
CATEGORIES OF AUTHORISATION...................................................................................................42
15‐
CATEGORIES OF APPOINTMENT......................................................................................................42
APPENDICES ................................................................................................................................... 44
APPENDIX 1
EARTHING ELECTRICAL POWERDISTRIBUTION EQUIPMENT.................................. 44
APPENDIX 2
OPERATIONAL AND SAFETY SWITCHING............................................................... 53
APPENDIX 3
SULPHUR HEXAFLUORIDE (SF6) SWITCHGEAR ...................................................... 58
APPENDIX 4
METALCLAD SWITCHGEAR.................................................................................... 62
APPENDIX 5
LIVE WASHING PROCEDURES for HV INSULATION ................................................ 68
APPENDIX 6
OVERHEAD LINES.................................................................................................. 74
APPENDIX 7
UNDERGROUND CABLES....................................................................................... 76
APPENDIX 8
SPECIAL PROVISIONS FOR MECHANICAL EQUIPMENT........................................... 79
APPENDIX 9
PROVISIONS FOR PHYSICAL AND CHEMICAL ENVIRONMENTS .............................. 84
APPENDIX 10
OPERATIONAL AREAS – ACCESS & WORKING ARRANGEMENTS............................ 90
APPENDIX 11 Procedure for Approval of Authorized, Competent & Control Persons and Contractor's Competent & HSE Staff............................................................................................... 96
APPENDIX 12
SUBSTATION BATTERIES...................................................................................... 104
APPENDIX 13
PERSONAL PROTECTIVE EQUIPMENT................................................................... 107
APPENDIX 14
LOCKOUT/TAGOUT PROCEDURE ......................................................................... 111
APPENDIX 15
STANDBY GENERATORS PROCEDURE .................................................................. 114
APPENDIX 16
AUTOMATICALLY AND/OR REMOTELY CONTROLLED EQUIPMENT ...................... 116
APPENDIX 17
ADD/REMOVE EQUIPMENT FROM THE SYSTEM (COMMISSION PHASE) .............. 119
APPENDIX 18
PUBLIC WORK NEAR OHL .................................................................................... 122
APPENDIX 19
LABORATORY SAFETY RULES ............................................................................... 124
APPENDIX 20
MOBILE ELEVATED WORK PLATFORMS (MEWP) AND LADDERS .......................... 131
Forms List ..................................................................................................................................... 142
DEMARCATION AND APPROACH TO HIGH VOLTAGE EQUIPMENT – ADDENDUM A ...................... 143
SYSTEM SAFETY RULES
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AMENDMENTS SHEET
REV. #
PAGE
NUMBER
DESCRIPTION OF CHANGE
All
New Issue
APPROVED BY
SIGNATURE
EFFECTIVE
DATE
SYSTEM SAFETY RULES
IR.GN.01
Effective Date :
Issue: 2
Revision: 0
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STATEMENT OF POLICY, PHILOSOPHY AND PRINCIPLES
1. COMPANY SAFETY POLICY
•
The Company accepts and recognizes its legal and moral responsibilities for ensuring the
safe design, operation and maintenance of equipment and for the provision of safe methods
of work and healthy working conditions for all employees, visitors, consultants and
contractors to its premises. These responsibilities are important and rank equally with all
other main aims and objectives of the Company.
•
The successful execution of this Policy relies on all employees complying with safety
requirements relevant to their responsibilities and discharging their personal duties in a
conscientious manner.
2. GENERAL PHILOSOPHY OF THE SYSTEM SAFETY RULES
•
The Company’s electrical and mechanical items of equipment are inter-connected to form
electromechanical systems. These systems contain some inherent dangers, but are carefully
designed so that when operated normally they are safe and all hazards are under control.
•
When work is to be carried out on, or near to, these interconnected systems, System Safety
Rules need to be specified to achieve safety from the inherent system dangers.
•
These System Safety Rules are based on a philosophy that persons must be protected from
the inherent system dangers, which is achieved by making those persons “safe from the
system”.
•
The inherent dangers are those arising from a system. The Rules define procedures and
responsibilities for achieving personal safety from the inherent system dangers. They may
be briefly summarized as follows
o Positive equipment identification and releasing the equipment concerned from
operational service for the planned work
o Establishing safe and controlled conditions for the work. This may be achieved by
either limiting the scope of the work, or providing isolation from a system.
Approved specialized procedures must be adopted when work has to be done on
equipment that must remain energized
o Formally authorizing the start of both planned and emergency work
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o Receiving the formal authority to start work, undertaking the work, supervising
safety throughout the work and clearing the authority when the work is either
completed or terminated
o Canceling the authority on completion of the work
o Restoring the system to normal operational service.
•
Further dangers can arise from the environment in which persons undertake work. The way
in which these dangers are managed is specified in the System Safety Rules.
3. ESSENTIAL PRINCIPLES OF THE SYSTEM SAFETY RULES
•
The following principles have been adopted in formulating the System Safety Rules:
o The System Safety Rules are directly concerned with achieving safety for persons
o When work is to be carried out on equipment, the primary means of achieving safety
is always by securing isolation. Where practicable, the isolating devices shall be
immobilized and locked in the isolated position. In the case of high voltage
equipment, earthing must always follow, and the earthing devices locked where
practicable. In the case of mechanical equipment draining, venting, purging and the
release of stored energy, where appropriate, must follow the isolation
o Approved specialized procedures are required for work where isolation is not
reasonably practicable, or where normal isolation procedures cannot be applied
o Persons are formally appointed as Competent, Authorized or Control Persons to
carry out defined duties
o Rigorous application of the System Safety Rules ensures that safety is maintained
across all internal and external boundaries and interfaces
o The achievement of “safety from the system” will involve the functions of
operational control, making safe and restoration of equipment and the actual planned
work. These functions cover different responsibilities, which are treated separately
in the System Safety Rules. The System Safety Rules do not preclude one person
from performing more than one function, but not at the same time.
o The ADWEA/ADDC HSE procedures and guidelines shall be reviewed, understood
and implemented by all staff working under the SSR.
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o Regular training in the understanding and application of SSR shall be given to all
concerned staff at regular time intervals.
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GENERAL PROVISIONS
1- APPLICATION OF RULES
1.1 The System Safety Rules must always be applied when working on or near to items of
Equipment which are part of a System.
1.2 The System Safety Rules must always be applied when access is gained or required to a
Prohibited Area and/or a Restricted Area.
1.3 Equipment shall be added to and removed from a System only in accordance with an Approved
procedure. This procedure should also specify when these System Safety Rules begin to apply or
cease to apply.
2- GENERAL SAFETY
2.1 In addition to the requirements for establishing Safety from the System specified in these
System Safety Rules, General Safety must be established and maintained at all times.
2.2 General Safety must be established before any work starts. The Authorized Person issuing the
safety document is responsible for identifying and prescribing General Safety at the workplace.
The Competent Person is responsible for implementing General Safety.
2.3 During the progress of the work the Competent Person in charge of the Working Party must
ensure that all members of the Working Party maintain adequate standards of General Safety.
In addition, he shall ensure that other work areas are not adversely affected by their activities.
The Competent Person must be available all the time at the workplace. In case he has to leave
for any reason, work shall be stopped and he must withdraw the Working Party out of the
workplace until he returns and ensures that General Safety is still maintained in all working
areas. If the work cannot be stopped for special reasons, the Safety document can be transferred
to another Competent Person, by following the “Transfer of Safety Document” procedure
3- SYSTEM SAFETY RULES, INSTRUCTIONS AND PROCEDURES
3.1 These System Safety Rules and the requirements of any supporting documents are mandatory.
In addition, System Safety Rules issued by other recognized authorities, where there is
interaction, must also be considered as mandatory.
3.2 At Locations where an interconnection between ADDC and another company or authority
exists special attention should be paid to the application of different System Safety Rules. The
relevant Connection Use of System and Interface Agreement should identify the boundaries and
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must specifically state the applicability of the different System Safety Rules. In all cases where
cross boundary safety precautions are necessary to achieve safety from the system and General
Safety in accordance with the applicable System Safety Rules, the specified Record of InterSystem Safety Precautions (RISSP) procedure must be followed.
3.3 In all cases where cross boundary safety precautions are necessary to achieve safe working in
accordance with the applicable System Safety Rules, the specified Record of Inter-System
Safety Precautions (RISSP) procedure must be followed.
3.4 The applicable company/ADWEA HSE/Operational procedure shall be understood followed
and implemented.
3.5 Regular training in the understanding and application of SSR shall be given to all concerned
staff at regular time intervals.
4- SPECIAL INSTRUCTIONS
4.1 Work on or near to a System to which these System Safety Rules cannot be applied, or for
special reasons should not be applied, must be considered in advance, then confirmed and carried
out in accordance with an Approved written procedure. This is intended to replace the System
Safety Rules with an alternative arrangement, which will ensure that all risks are effectively
controlled to a standard comparable with the System Safety Rules.
5- OBJECTIONS FOR SAFETY REASONS
5.1 Any person who has objections on a safety basis related to the application of the System Safety
Rules shall explain their reasons to the supervisor giving the instructions. These objections must
always be resolved satisfactorily before any work can proceed.
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DEFINITIONS
Authorization Officer (HSEQ Dept Manager)
•
A senior member of staff nominated by ADDC Senor Management “HSEQ Department
Manager” to be an Authorization Officer, who will then be responsible for the monitoring the
implementation of SSR and ensuring that the appointed personnel have required qualification
and experiences and received appropriate training and pass any necessary practical testing.
Approved
•
Sanctioned for use in writing by an appropriate officer of the Company.
Caution Notice
•
A notice of an Approved type, conveying a warning against interference with Isolated
equipment. These notices are attached at all Points of Isolation.
Circuit Identification
•
Colors or symbols used to identity overhead line circuits and other Equipment.
Combustible
•
Substance capable of igniting and burning readily.
Company
•
ADDC - The Abu Dhabi Distribution Company, an autonomous company forming part of the
Abu Dhabi Water and Electricity Authority.
Confined Space
•
A space large enough for a person to bodily enter and perform assigned work, has limited or
restricted means of entry and exits, and is not designed for continuous employee occupancy.
Connection and Interface Agreement
•
A document (agreement) between ADDC and another company describing and specifying the
point of interface where connections are made between Equipment of the companies at a
Location as well as the application of the System Safety Rules at the Location.
Consent
•
Confirmation by the Control Person, before the issue of a Safety Document, that safety
precautions have been carried out on the correct Equipment at all Locations and that control
procedures are in place to maintain these until the Safety Document is cancelled.
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Danger
•
A risk to health, or bodily injury.
Danger Notice
•
A notice of an Approved type, conveying a warning of the risk of Danger of approach to either
electrical or general hazards. These notices are also displayed at the limits of safe working
areas, calling attention to the adjacent Dangers.
Dead
•
At zero potential (voltage), and is disconnected from any Live system, isolated and earthed.
Earthed
•
Connected to the general mass of earth by means of an Earthing Device in such a manner that
will ensure an immediate and safe discharge of electrical energy at all times.
Earthing Device
•
A means of providing a connection between an Isolated electrical conductor and earth, being
one of the following
• Primary Earth
A fixed or portable Earthing Device applied to an Isolated electrical conductor to protect
against inadvertent energisation. Portable Primary Earths must be Approved and have a
cross sectional area of not less than 70 sq mm copper equivalent.
• Additional Earth
A fixed or portable Earthing Device applied at or near the point of work providing protection
against induced voltages. Portable Additional Earths must be Approved and have a cross
sectional area of not less than 25 sq mm copper equivalent.
• Portable Earth
An insulated flexible conductor fitted with suitable clamps for connecting together an electrical
conductor and Earth, using an Approved insulated operating pole or insulated hand clamp.
Earthing Schedule
•
A schedule indicating the Additional Earth requirements for each stage of the work necessary
to control induced voltages as circumstances change.
Equipment
•
All electrical apparatus and mechanical plant forming part of the operational assets to which the
System Safety Rules apply.
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Excavation
•
Work, excavations, drilling, boring, construction, demolition or surface removal or penetration
in any manner of owned property, streets, alleys, easements, or public lands within the
corporate limits.
General Safety
•
The provision and maintenance of safe access to and from the place of work, a safe place of
work, a safe working environment, safe methods of work and the correct use of effective
personal protective equipment.
High Voltage (HV)
•
A voltage exceeding 1000 volts.
Hot Work
•
Any work activity, including grinding, cutting and welding, which may produce heat, sparks or
flames.
Isolated
•
Total disconnection from associated Equipment or a System by an Isolating Device in the
isolating position, or by adequate physical separation.
Isolating Device
•
A device used for rendering Equipment Isolated.
Key(s), being one of the following
•
Safety Key
A key unique at the Location for safety locking an Isolating Device, Earthing Device, vent or
drain
•
Control Key
A master key for operating the control lock of a Key Safe or Multi-clasp, and issued to
Authorized Persons only
•
Key Safe Key
A key unique at the Location for operating a personal safety lock, other than the control lock,
on a Key Safe.
Key Safe
•
An Approved device for the secure retention of Safety Key(s), links and fuses.
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Live
•
Live means connected to the power system and/or electrically charged.
Location
•
Any place at which work under the Company’s System Safety Rules is carried out.
Locked
•
A condition of Equipment that cannot be altered without the release of a safety or security
lock.
Log Book
•
A permanent written record, used at all control points and workplaces, to create a
comprehensive detailed record of operational and safety switching and associated safety
procedures.
Low Voltage (LV)
•
A voltage up to and including 1000 volts.
Multi-clasp
•
An Approved security clasp providing dual control for Authorized Persons and Competent
Persons and used at selected single Points of Isolation as an alternative to a Key Safe.
Operational Service
•
Under the operational control of a Control Person
Persons, being one of the following
Competent Person
•
A person who has sufficient technical knowledge and experience to recognize and avoid
Danger and been appointed in writing by an Authorization Officer of the Company to carry
out defined duties. These may include the maintenance of Equipment and the receipt and
clearance of specified Safety Documents, in accordance with a Competency Certificate
Authorized Person
•
A person who, has been appointed in writing by an Authorization Officer of the Company to
carry out defined duties. These may include the operation of Equipment and the preparation,
issue, and cancellation of specified Safety Documents, in accordance with an Authorization
Certificate
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Control Person
•
A person who has been appointed in writing by an Authorization Officer of the Company to
be responsible for the operational control and co-ordination of the System and the control and
co-ordination of safety activities necessary to achieve Safety from the System, within and
across defined boundaries in accordance with an Authorization Certificate
Point(s) of Isolation
•
The point at which Equipment has been Isolated to provide a physical separation and where
reasonably practicable, the Isolating Device immobilized and Locked and the Keys controlled
in a Key Safe or controlled by a Multi-clasp. Caution Notices must be attached at all Points
of Isolation.
Pressurized
•
A condition of Equipment containing a gas or fluid above atmospheric pressure.
Prohibited Area
•
A Prohibited Area is an area under the control of ADDC where equipment is housed that can
pose a direct danger to unauthorized persons and operation and/or maintenance is under the
supervision of ADDC staff. Typical examples of prohibited areas (electrical) are substation
buildings and transformer bays within the total substation perimeter fence.
Purged
•
A condition of Equipment from which any dangerous contents have been removed.
Pyrophorics
•
Substances that may spontaneously ignite after drying out in the presence of oxygen.
Record of Inter-System Safety Precautions (RISSP)
•
A Safety Document being a form of declaration which specifies the Equipment and the
actions across an interface boundary to achieve Safety from the System and must be used in
conjunction with a Permit to Work or a Sanction for Test.
Restricted Area
•
A Restricted Area is an area under the control of ADDC where buildings and/or other
equipment belonging to ADDC are housed. Typical restricted areas (electrical) are substations
yards.
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Safety Clearance
•
The distance from the nearest exposed High Voltage conductor not Earthed, or from an
insulator supporting an exposed High Voltage conductor, which must be maintained at all
times to avoid Danger to persons.
Safety Clearance Certificate
•
A Document that specifies the Equipment that will become part of the System as well as the
date at which the Equipment becomes part of the System and Company System Safety Rules
must be applied to the Equipment. (this can be an official letter or a notification by Operation
planning to all concerned functions including contractors)
Safety De-Clearance Certificate
•
A Document that specifies the Equipment that will no longer be part of the System as well
as the date at which the Equipment not be part of the System anymore and Company
System Safety Rules cease to apply to the Equipment. (this can be an official letter or a
notification by Operation planning to all concerned functions including contractors)
Safety Documents, being one of the following
•
Permit to Work
A Safety Document being a form of declaration which specifies the Equipment, the work to
be carried out, the Points of Isolation, other safety precautions and actions taken to achieve
Safety from the System and it is one of the followings:
•
Permit to Work (Electrical HV)
A Safety Document being a form of declaration which specifies the HV Equipment, the work
to be carried out, the Points of Isolation and the position of the Primary Earths and actions
taken to achieve Safety from the System
•
Permit to Work (Electrical LV)
A Safety Document being a form of declaration which specifies the LV Equipment, the work
to be carried out, the Points of Isolation and the position of the Primary Earths / Additional
Earths and actions taken to achieve Safety from the System
•
Permit to Work (Mechanical/Water)
A Safety Document being a form of declaration which specifies the Equipment, the
Mechanical work to be carried out, Points of isolation, points of venting / draining and actions
taken to achieve Safety from the System
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Sanction for Test
A Safety Document being a form of declaration which specifies the Equipment, the Points of
Isolation, the position of the Primary Earths, work/tests to be carried out which requires the
removal of Primary Earths and the actions taken to achieve Safety from the System
•
Limited Access Permit
A Safety Document being a form of declaration which defines the limits within which work
may be carried out and specifies the necessary safety precautions
Safety from the System
•
That condition which safeguards persons working on or near to Equipment from the Dangers
which are inherent in a System.
Self-contained breathing apparatus (SCBA)
•
A device worn to provide breathable air in a hostile environment. The breathing set is not
dependent on a remote supply (e.g., through a long hose). An SCBA typically has three main
components: a high-pressure tank, a pressure regulator, and an inhalation connection, connected
together and mounted to a carrying frame.
Supervision
•
The control and direction exercised by a Competent Person during maintenance activities or
an Authorized Person during operational activities, and are present at the point of work at all
times during the progress of the work.
System
•
Items of Equipment that are used separately or in combination for the generation, transmission
or distribution of electricity or water.
Vented
•
Having a permanent outlet to the atmosphere so that internal pressure has equalized to
atmospheric pressure.
WHIMIS
•
Workplace Hazardous Materials Information System for chemical classification and
communication
Working Party
•
Individuals working under the direct Supervision of a Competent Person during maintenance
activities or an Authorized Person during operational activities.
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THE BASIC SYSTEM SAFETY RULES
1- SAFETY PRECAUTIONS WHEN APPROACHING EXPOSED
CONDUCTORS AND INSULATORS
1.1 Individuals must not allow any part of their body or objects to approach within the specified
Safety Clearances to exposed conductors which are Live.
1.2 When Points of Isolation have been established and exposed conductors could be subject to any
voltage, the only objects permitted to approach within the Safety Clearances shall be Approved
voltage measuring devices or Earthing Devices. In special circumstances, and always subject to
prior assessment by an Authorized Person, persons may approach within the Safety Clearances
for the application of the above Approved devices.
1.3 When Points of Isolation have been established and all Danger has been totally excluded by the
application of Earthing Devices, approach is allowed under an appropriate Safety Document to
within the specified Safety Clearances.
1.4 Opening or replacing fuses/links on overhead lines with the end of an Approved Insulated Pole
entering into the Safety Clearance, will only be done by an Authorized Person according to an
approved procedure.
1.5 Safety Clearance
The Safety Clearance and Approach Boundaries as indicated in the following tables is for any
Live Exposed fixed circuit part as per NFPA 70E Table 130.2 (C).
Rated
System
Voltage
(kV)
Safety Clearance
(Limited Approach
Boundary) (cm)
Restricted
Approach
Boundary (cm)
Prohibited
Approach
Boundary (cm)
Up to 1
107
30
2.5
Up to 11
153
66.0
18.0
22
183
79
26
33
183
79
26
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A distance of 50 cm shall also be maintained from that part of the insulators supporting exposed
High Voltage conductors, which is outside the appropriate Safety Clearance.
The following table includes the Safety Clearance, Restricted Approach Boundary and Prohibited
Approach Boundary for voltages higher than 33 kV. This table can be used as additional
information to the applicable voltages as used by ADDC
Rated
System
Voltage
(kV)
Restricted
Approach
Boundary (cm)
Prohibited
Approach
Boundary (cm)
132
Safety Clearance
(Limited Approach
Boundary)
(cm)
300
110
94
220
400
160
145
400
550
310
290
The Safety Clearance is the distance specified to avoid any flash over between the line and any
body or objects approaching the specified distance (boundary). However the density of the charging
level for the atmosphere along the route of the O.H.L. differ from one place to other depending on
the weather conditions and/or the lines running parallel or crossing the specific line worked upon.
Flash Protection Boundary: An approach limit at a distance from exposed live parts within which a
person could receive a second degree burn if an electrical arc flash were to occur.
Limited Approach Boundary:
An approach limit at a distance from an exposed live part within which a shock hazard exists.
Restricted Approach Boundary:
An approach limit at a distance from an exposed live part within which there is an increased risk of
shock, due to electrical arc over combined with inadvertent movement, for personnel working in
close proximity to the live part.
Prohibited Approach Boundary:
An approach limit at a distance from an exposed live part within which work is considered the same
as making contact with the live part.
The Authorized Person has to take the above case in consideration before issuing the Safety
Document.
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Safety Clearance for Overhead Lines
Safety Clearance
50 cm
Safety Clearance for Metal Clad Switchgear
The same Safety Clearance distances as given in the tables (above) apply for Metal Clad Switchgear.
When approaching exposed live conductors in Metal Clad switchgear the following must be done:
• Determine the Flash Protection Boundary and, if the boundary is to be crossed,
appropriate flash-flame protection (PPE) equipment must be worn.
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Safety Clearance and Approach Boundaries
Any point on an
exposed,
energised
electrical
conductor or
circuit part
Restricted Approach Boundary
Up to 1000 V
11 kV
22 kV
33 kV
– 30 cm
– 66 cm
– 79 cm
– 79 cm
Flash Protection
Boundary
This distance must be
determined using a
procedure to calculate
the Arc Flash energy.
No fixed distances can
be given.
Prohibited Approach Boundary
Up to 1000 V
11 kV
22 kV
33 kV
– 2.5 cm
– 18 cm
– 26 cm
– 26 cm
Safety Clearance
(Limited Approach Boundary)
Up to 1000 V
11 kV
22 kV
33 kV
– 107 cm
– 153 cm
– 183 cm
– 183 cm
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2- SAFETY PRECAUTIONS FOR WORK ON OR NEAR TO HIGH VOLTAGE
EQUIPMENT
2.1 When work is to be carried out on or near to HV Equipment, an Authorized Person shall
assess the means of achieving Safety from the System. When this is either by limiting the work or
the work area, instructions clearly defining the limits shall be given. The Authorized Person shall
then issue a Limited Access Permit.
2.2 When limiting the work or the work area is insufficient to achieve Safety from the System, the
following safety precautions shall be applied
2.2.1
The HV Equipment shall be identified and the Control Person shall prepare it for release
from Operational Service
2.2.2 The Authorized Person shall ensure that the Equipment is Isolated and that Points of
Isolation are established for the work
2.2.3 The Authorized Person shall assess the situation, check for and confirm no volts using an
Approved voltage testing device and then discharge the Equipment. The voltage indicator
must be tested immediately before and after use.
2.2.4 For work on HV Equipment, Primary Earths shall be applied within the zone established by
the Points of Isolation. Where reasonably practicable the Primary Earths shall be Locked
2.2.5 The contents of the HV Equipment shall be adjusted to a level which avoids all Danger.
Where drain valves are used they shall, where practicable, be Locked in the appropriate
position
2.2.6 Where Danger could arise from pressurization, the HV Equipment shall be Vented. The
emissions shall be dissipated so as to avoid Danger. Where reasonably practicable drain vents
shall be Locked open
2.2.7 Where internal access is required, and the residue of contents could cause Danger, the HV
Equipment shall be Purged. The emissions shall be dissipated so as to avoid Danger. The
Equipment shall be restored to atmospheric pressure when purging is complete
2.2.8 where Danger could arise from the release of stored energy, action shall be taken to contain or
dissipate this energy safely
2.2.9 When work on the HV Equipment does not require the removal of Primary Earths a Permit
to Work shall be issued.
SYSTEM SAFETY RULES
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When work is to be carried out on HV Equipment, and where it is necessary to restore the
means of supplying power for certain Approved work/tests, during the period that the Permit
to Work is in force and the removal of Primary Earths is not required, the following
additional precautions shall be applied
2.3.1 No other Permit to Work or Sanction for Test shall be in force on the same items of HV
Equipment
2.3.2 An Approved written procedure shall be provided and observed. This shall specify the
requirements necessary to maintain Safety from the System for the period whilst motive
power is restored.
2.4 When work is to be carried out on HV Equipment, and where it is necessary to restore a
to Work is in force and the removal of Primary Earths is required, the following procedure
shall be followed:
2.4.1 All the members of the working parties shall be withdrawn and all Safety Documents for
work on the HV Equipment shall be cleared.
2.4.2 The Authorized Person shall assess the work and issue a Sanction for Test that allows the
removal of the Primary Earths for the period that power is restored to the HV Equipment.
2.5
2.5.1
When testing on HV Equipment requires the removal of Primary Earths a Sanction for
Test shall be issued. Provided Safety from the System is maintained the following additional
precautions shall be applied
No Permit to Work or other Sanction for Test shall be in force on the same item of HV
Equipment or any other item of HV Equipment which could be affected by the removal of
the Primary Earths
2.5.2
The Primary Earths that may be removed and replaced during the testing shall be positively
identified
2.5.3 Essential supplies which may be restored to enable the work to take place shall be defined
2.5.4
Testing shall be carried out in accordance with an Approved written procedure.
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2.6 When work must be done on or near HV Equipment by more than one Working Party at the
same time, the following shall apply:
2.6.1
Only one Authorized Person shall assess the work and if the work does not require the
removal of Primary Earths, Permits to Work can be issued to every Competent Person
responsible for supervising the work performed by the respective Working Party as long as
the work by the different working parties is done using the same Points of Isolation and
Primary Earths. All the Competent Persons must add their locks. (Refer to IEEE C2 –section
410 C)
2.6.2
When it is required to issue a Sanction for Test to a specific Working Party, no Safety
Documents will be issued to the other Working Parties.
2.6.3
If any Safety Documents are outstanding, the Sanction for Test shall not be issued until
such time that the other Safety Documents have been cancelled.
2.7 When Danger from induced voltages could arise during the course of work, Additional
Earths shall be applied. Any Portable Additional Earths shall be issued with the Permit to
Work or Sanction for Test, together with an Earthing Schedule if necessary, which shall
specify the Additional Earth requirements for each stage of the work.
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3- SAFETY PRECAUTIONS FOR WORK ON OR NEAR TO LOW VOLTAGE
EQUIPMENT
3.1 When work is to be carried out on or near to LV Equipment, an Authorized Person shall
assess the means of achieving Safety from the System. When this is by limiting the work or
the work area, instructions clearly defining the limits shall be given. The work will then
proceed under the Supervision of the Authorized Person. When the Authorized Person
decides it is necessary to confirm these instructions in writing, he shall issue a Limited Access
Permit.
3.2 When limiting the work or the work area is insufficient to achieve Safety from the System,
work on or near to LV Equipment shall where reasonably practicable be carried out with the
LV Equipment Dead. The following safety precautions shall be applied
3.2.1 The LV Equipment shall be identified and the Authorized Person shall prepare it for release
from Operational Service
3.2.2 The Authorized Person shall ensure that the LV Equipment is Isolated and that Points of
3.3
An Authorized Person shall assess the work required on or near to the Dead LV Equipment
and decide whether it shall be carried out under;
3.3.1
3.3.2
3.3.3
3.3.4
Under Direct Supervision of an Authorized Person, or
Limited Access Permit , or
Permit to Work (LV), or
Sanction for Test (if required)
3.4
When work is to be carried out on LV Equipment, and where it is necessary to restore a
to Work is in force and the removal of Primary Earths is not required, the following shall be
applied:
3.4.1 No other Permit to Work or Sanction for Test shall be in force on the same items of LV
Equipment.
power is restored.
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When work is to be carried out on LV Equipment, and where it is necessary to restore a
to Work is in force and the removal of Primary Earths is required, the following procedure
shall be followed:
3.5.1 All members of the working parties shall be withdrawn and all Safety Documents for work on
the LV Equipment shall be cleared.
3.5.2 The Authorized Person shall assess the work and issue a Sanction for Test that allows the
removal of the Primary Earths for the period that power is restored to the LV Equipment.
3.6
When it is unreasonable for the LV Equipment to be made Dead, suitable precautions shall
be taken to avoid Danger. An Authorized Person shall assess the work required on or near to
the Live LV Equipment and decide whether it shall be carried out under:
3.6.1 Precautions specified in an Approved written procedure, or
3.6.2 A Limited Access Permit.
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4- SAFETY PRECAUTIONS FOR WORK ON OR NEAR TO MECHANICAL
EQUIPMENT
4.1
When work is to be carried out on or near to Mechanical Equipment, an Authorized Person
shall assess the means of achieving Safety from the System. When this is by limiting the
work or the work area (equipment did not required to be shutdown), instructions clearly
defining the limits shall be given. When the Authorized Person decides it is necessary to
confirm these instructions in writing, he shall issue a Limited Access Permit.
4.2
When limiting the work or the work area is insufficient to achieve Safety from the System
the following safety precautions shall be applied
4.2.1 The Mechanical Equipment shall be identified and the Authorized Person shall prepare it for
release from Operational Service
4.2.2 The Authorized Person shall ensure that the Mechanical Equipment is Isolated and that
Points of Isolation are established for the work
4.2.3 The contents of the Mechanical Equipment shall be adjusted to a level which avoids Danger.
Where drain valves are used they shall where practicable be Locked in the appropriate
position
4.2.4 Where Danger could arise from pressurization, the Mechanical Equipment shall be Vented.
The emissions shall be dissipated so as to avoid Danger. Where reasonably practicable vents
shall be Locked open
4.2.5 Where internal access is essential, and the residue of contents could cause Danger, the
Mechanical Equipment shall be Purged. The emissions shall be dissipated so as to avoid
Danger. The Equipment shall be restored to atmospheric pressure when purging is complete
4.2.6 Where Danger could arise from the release of stored energy, action shall be taken to contain
or dissipate this energy safely
4.2.7 Before work commences a Permit to Work (Mechanical) shall be issued.
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When work is to be carried out on Mechanical Equipment, and it is necessary to restore the
means of supplying power for certain Approved work, during the period that the Permit to
Work is in force, the following additional precautions shall be applied
4.3.1 No other Permit to Work shall be in force on the same items of Mechanical Equipment.
power is restored.
5- BOUNDARY IDENTIFICATION OF SAFE WORKING AREAS
5.1 The boundary to the safe working area shall be defined clearly using red and white tape or red
and white chain. Danger notices must be displayed at regular intervals at the limit of the safe
working area and facing towards the safe area. Where necessary it shall be protected physically
to prevent Danger to individuals in the area from System hazards near to the work area.
5.1 Ensure Access Control by determining the extent of the area of work and demarcate it with
barricade tape or use another reliable means to restrict entry into the area. Other components of
demarcation include demarcation foots, support posts, chains and D Links. These areas must:
•
•
•
•
•
•
•
Under the control of a Competent Person;
Be in an area set apart by barriers to prevent entry;
Having suitable warnings provided at the entrance;
accessible during testing only to Competent Person and people working under his direct
supervision;
Having suitable warning lights indicating that testing is in progress and other warning
lights to indicate when it is safe to enter the area;
Display safety posters, e.g. Electric shock: first-aid procedures, at prominent locations,
showing emergency arrangements, especially telephone numbers;
Have good housekeeping arrangements, including adequate clear working space.
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6- WORK AND DEMARCATION IN SUBSTATIONS
6.1 SCOPE
This describes the procedures to be adopted for the demarcation of work in substations.
6.2 DEFINITIONS
For the purposes of this document the following definitions apply.
Safety Notices being one of the following:Danger Notice – An Approved notice reading “Danger” which is attached to Equipment
and structures outside the boundary marking to warn of electrical or mechanical Dangers.
Keep Clear Overhead Live Equipment Notice – An Approved notice warning about
danger from overhead live equipment.
Terms printed in bold type are as defined in the Safety Rules.
6.3 EQUIPMENT IDENTIFICATION
Equipment on which work is to be carried out must be readily identifiable. Where necessary
a means of identification must be fixed to it which will remain effective throughout the
course of the work.
6.4 DANGERS
The main Dangers to personnel arising out of inadequate demarcation in substations are
electric shock, burns and serious injury from the possibility of mistaking Equipment on
which it is unsafe to work, for that on which it is safe to work inadvertently infringing Safety
Distance, inadequate planning leading to a failure in the co-ordination of all work Activities
and failure to adequately control vehicle movement.
6.5 RISK ASSESSMENT
6.5.1
Demarcation of a work area is one of the main control measures in achieving Safety from
the System by ensuring clear boundaries between safe and unsafe workplaces.
6.5.2
Contractors are responsible for preparing their own risk assessments; this may be carried out
on their own forms and must achieve an equivalent standard to SSR.
6.5.3
The Authorised Person/Competent Person shall carry out a specific on site risk assessment
to determine the most appropriate system for defining the limits of the work taking into
account the work to be done.
6.6 WORK
6.6.1
When work is to be carried out in a substation, an Authorised Person must assess the means
of achieving Safety from the System.
6.6.2
Work in a substation must be carried out under the Supervision of a Competent Person.
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6.7 DEMARCATION STANDARDS
6.7.1
General
The Authorised Person must decide whether demarcation is appropriate for work carried out
under a Limited Access Permit.
6.7.2
Work areas
Where a work area is to be demarcated for work on High Voltage (HV), Low Voltage (LV)
or mechanical Equipment, following the risk assessment:

The Authorised Person shall instruct the Competent Person on the positioning of the
demarcation equipment

The boundary marks and safety notices must only be fixed or moved by a Competent
Person or by a Person under the direct Supervision of a Competent Person

The Authorised Person issuing the Safety Document must ensure that the designated work
area has been demarcated correctly before issuing the Safety Document

Entry to a demarcated area is only permitted by a member of the Working Party under the
terms of the Safety Document.
Where a demarcated area has been set up it must have a readily identifiable designated access
point(s). An Access Point Notice must be positioned adjacent to the access point. If no Safety
Document recipient is on site, the access/egress point should be closed prohibiting access.
The dismantling of the chain or barrier by the Safety Document recipient is permitted to
allow access/egress of plant, vehicles etc only. The chain or barrier must be restored
immediately the plant, vehicles etc has entered or left the work area.
In general the boundary marking must be arranged so that all structures supporting any Live
Equipment are excluded from the work area. Where such an arrangement is impracticable,
special precautions against unsafe access must be taken. All unsafe access must be clearly
identified by attaching sufficient Access Prohibition Notice(s), visible from all directions of
approach, to the Equipment and structures at a level beyond which it is unsafe to pass to
warn people of Danger.
It must be strictly forbidden for anyone to enter or exit a demarcated work area by crossing
over or under any chain or barrier. The designated access point must be used.
Safety Notice(s) must be attached to, or fixed adjacent to, adjoining Equipment and
structures in sufficient numbers to be clearly visible from the work area and all approach
routes at all times.
Where physical demarcation is to be used this must be:
Erected after completion of all safety precautions and before any Safety Document is
issued

Removed after the clearance of the Safety Document(s).
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Examples of Demarcation are shown in Demarcation and Approach to High Voltage
Equipment - Addendum
6.8
When doing work near overhead lines the boundary to the safe working area must be
identified to prevent workers and vehicles to approach to close to the overhead lines.
When it is necessary for vehicles to cross the overhead line, a safe route for such crossing
must be established. This route must take into account:
• The maximum height of vehicles allowed to pass under the line
• The width of the vehicles.
Examples of Demarcation are shown in Demarcation and Approach to High Voltage
Equipment - Addendum
7- IDENTIFICATION OF EQUIPMENT
Work shall only be permitted to start on Equipment that is clearly identified. Where necessary, an
Approved means of temporary identification shall be attached which will remain effective
throughout the progress of the work and removed on completion of the work.
8- OPERATION OF EQUIPMENT
8.1 The operation of Equipment to achieve Safety from the System by either pre-arranged signals
or the use of agreed time intervals is strictly forbidden.
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SAFETY DOCUMENT PROCEDURES
1- GENERAL
1.1
This part of the System Safety Rules provides outline procedures for the preparation, issue,
clearance and cancellation of Safety Documents.
1.2
When the outline procedures described here cannot be applied at a specific Location, the
manner in which Safety Document procedures are to be applied at a Location shall be
specified in an Approved procedure.
1.3
When the Authorized Person assesses a Location to achieve Safety from the System for
work or testing to be performed, he must consider the need to obtain Safety Documents from
other disciplines such as Electrical, Mechanical, Traffic, Water, etc as applicable before the
Safety Document for the work can be issued.
2- APPLICATION
2.1 All Safety Documents shall be personally retained.
2.2 The Safety Document shall be issued to, and personally retained by, the
Competent Person in charge of the work. He must keep the Safety
Document and Key Safe Key in safe custody.
2.3 The Competent Person in charge of the work has a duty to instruct and fully
explain the safety precautions which achieve Safety from the System to all
members of his Working Party. He also has a further duty to explain how
General Safety has been established and will be maintained throughout the
work.
3- SAFETY PRECAUTIONS - PERMIT TO WORK
3.1
Safety precautions to achieve Safety from the System shall be applied by an Authorized
Person. For High Voltage Equipment, the safety precautions shall be applied under the
instructions of a Control Person. They shall both complete and sign a record of the safety
precautions taken (Maneuvering in planning shutdown and recording calls in emergency
shutdown).
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3.2
The Authorized Person shall place the Safety Keys securing the safety precautions in a Key
Safe, which shall be Locked by a Key Safe Key. The Key Safe Key shall be removed and
handed over to the Competent Person receiving the safety document.
3.3
The Authorized Person shall further secure the Key Safe by locking using the Control Key.
3.4
The Authorized Person shall place a Caution Notice at all point of isolation and point of
earthing, this notice shall have information that the equipments under work/maintenance and
safety document number mentioned
3.5
When a Multi-clasp is used to secure selected single Points of Isolation, then a control
padlock will be attached by the Authorized Person and an additional safety padlock attached
by each Competent Person.
3.6
When the Authorized Person considers that there are unusual circumstances, he shall obtain a
written report from an appropriately qualified specialist on any additional safety precautions
necessary to establish and maintain General Safety during the work.
3.7
The Authorized Person shall prepare the Permit to Work, also obtaining from the Control
Person, confirmation of the safety precautions taken at all remote Locations (Recorded call).
4- SAFETY PRECAUTIONS - PERMIT TO WORK (Mechanical)
4.1 Safety precautions to achieve Safety from the System shall be applied by an Authorized
Person. For Mechanical Equipment, the safety precautions shall be applied under the
shutdown program.
4.2 The Authorized Person shall place the Safety Keys securing the safety precautions in a Key Safe,
which shall be locked by a Key Safe Key. The Key Safe Key shall be removed and handed over
to the Competent Person receiving the safety document.
4.3 The Authorized Person shall further secure the Key Safe by locking using the Control Key.
4.4 When a Multi-clasp is used to secure selected single Points of Isolation, then a control padlock
will be attached by the Authorized Person and an additional safety padlock attached by each
Competent Person.
4.5 When the Authorized Person considers that there are unusual circumstances, he shall obtain a
4.6 The Authorized Person shall prepare the Permit to Work (Mechanical)
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5- SAFETY PRECAUTIONS - PERMIT TO WORK (Low Voltage)
5.1 Safety precautions to achieve Safety from the System shall be applied by an Authorized Person.
For Low Voltage Equipment, the safety precautions shall be applied under the instructions of a
Field Service Shift Engineer (Authorized Person).
5.2 The Authorized Person shall place a caution Notice at all point of isolation and point of earthing
,where applicable the Safety Keys securing the safety precautions in a Key Safe, which shall be
Locked by a Key Safe Key. The Key Safe Key shall be removed and handed over to the
Competent Person receiving the safety document.
5.4 When a Multi-clasp is used to secure selected single Points of Isolation, then a control padlock
will be attached by the Authorized Person and an additional safety padlock attached by each
Competent Person.
5.6 The Authorized Person shall prepare the Permit to Work (LV),
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6- SAFETY PRECAUTIONS – SANCTION FOR TEST
6.1 Safety Precautions to achieve Safety from the System shall be applied by an Authorized
Person. For HV Equipment, the Safety Precautions shall be applied under the instructions of a
Control Person. They shall both complete and sign a record of the safety precautions taken.
6.2 The Authorized Person shall place the Safety Keys securing the Safety Precautions (Points of
Isolation) in a Key Safe, which shall be locked by a Key Safe Key. The Key Safe Key shall be
removed and retained in safe custody.
6.5 The Authorized Person shall prepare the Sanction for Test also obtaining from the Control
Person confirmation of the Safety Precautions taken at all remote Locations.
6.6 The Authorized Person shall hand over the keys, securing the Safety Precautions (Primary
Earths) to be removed and re-applied, to the Competent Person having a competency level to
apply and remove the primary earth.
7- SAFETY PRECAUTIONS – LIMITED ACCESS PERMIT
7.1 Safety Precautions to achieve Safety from the System shall be applied by an Authorized
Person. For HV Equipment, the Safety Precautions shall be applied under the instructions of
a Control Person. They shall both complete and sign a record of the safety precautions taken.
7.2 The Authorized Person shall assess the work and decide what measures must be taken to ensure
Safety from the System by limiting the access or approach to Live Equipment.
7.3 The Authorized Person shall further ensure that General Safety is Identified and informed to
the Competent Person.
7.5 The Authorized Person shall prepare the Limited Access permit.
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8- PREPARATION, ISSUE AND RECEIPT OF SAFETY DOCUMENTS
8.1 The Authorized Person preparing a Safety Document shall enter the following details, as
appropriate
•
The Location where the work is to be done including the identification of the Equipment as
well as the nature of the work to be done (PTW / LAP)
•
The Location where the work is to be done including the identification of the Equipment as
well as the nature of the testing to be done (SFT).
•
Limits of Work and/or Work Area (LAP)
•
The hazards that have been identified and control measures assessed for work (LAP-PTWSFT).
•
The Precautions to be taken for a Safe System of Work and to avoid System derived
hazards for work (LAP/PTW/SFT).
•
The Points of Isolation (PTW / SFT).
•
The location of the Primary Earths (PTW / SFT).
•
The actions taken to avoid Danger by draining, purging, venting, containment or dissipation
of stored energy (PTW / SFT).
•
Any additional precautions to be taken during the course of the work to avoid System
derived hazards (PTW / SFT).
•
Safety Precautions that may be varied by the Competent Person during Testing (SFT).
With reference to NFPA 70E section 130.1 and in addition to the above, the following
details should be included in LAP:
•
•
•
•
•
Justification for why the work must be performed in an energized condition.
A description of the safe work practices to be employed.
The necessary personal protective equipment to safely perform the assigned task.
Means employed to restrict the access of unqualified persons from the work area.
Energized work approval signature.
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8.2 The Authorized Person issuing a Safety Document shall complete the Issue Section, recording as
appropriate
•
•
•
•
The Key Safe Key number
The Earthing Schedule number, if appropriate
The number of Portable Additional Earths provided/Issued
Whether a sketch is provided and attached
8.3 The Authorized Person issuing a Safety Document shall provide the Competent Person with the
items listed in the Issue Section.
8.4 The Authorized Person issuing a Safety Document shall ensure that the Competent Person
8.4.1
Reads and understands the Safety Document and the limits of
the work
8.4.2
Can positively identify the Equipment to be worked on, point of isolation and earthing
8.4.3
Test and verify the isolation
8.4.4
Understands any additional safety precautions (General Safety) that need to be taken.
8.4.5
The Authorized Person shall sign the Issue in the Issue Section and enter the time and date.
8.5 The Competent Person shall sign the Receipt in the Receipt Section and enter the time and date.
8.6 There are three copies to each Safety Document. Copies are provided to the Authorized Person
and Competent Person at the start of the work.
9- CLEARANCE OF SAFETY DOCUMENTS
9.1 Before signing the Clearance Section of a personally retained Safety Document the Competent
Person shall ensure that
9.1.1 All persons in his Working Party have been withdrawn from the work area and warned not to
continue to work on the Equipment concerned
9.1.2 All gear, tools, Additional Earths and loose material have been removed and guards and access
doors replaced
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9.2 A procedure for obtaining special clearance is required when a Safety Document is lost or the
document holder becomes permanently indisposed. The method of clearing the Safety
Document shall be as follows:
9.2.1 Every endeavor must be made to retrieve the original document duly cleared
9.2.2 For a lost Safety Document, a Special Clearance Statement must be signed by the original
holder, formally declaring the document lost
9.2.3 Where it is impossible or impracticable to contact the original Safety Document holder then a
responsible representative of his employer must sign a Special Clearance Statement which must
then be formally Approved within the Company prior to subsequent cancellation of the Safety
Document.
9.3 TRANSFER OF SAFETY DOCUMENTS
9.3.1
The transfer of Safety Documents should only be allowed in certain emergency situations.
The following procedure should be followed:
• The Competent Person must explain to the Authorized Person the reason why he
cannot continue supervising the work.
• If the Authorized Person agrees that the Safety Document needs to be transferred,
he completes the Motivation Section of the Transfer of Safety Document
Approval document and gets the approval from the Control Person.
• The Authorized Person also completes the declaration by Authorized Person
section of the document.
• The Outgoing Competent Person completes the Declaration by Outgoing
Competent Person section of the document.
• The Incoming Competent Person completes the Declaration by Incoming
Competent Person section of the document.
• The Transfer of Safety Document Approval document must be attached to the
original Safety Document and displayed at the place of work.
• The Incoming Competent Person receiving the safety document (transferred)
must have the same competency level of the Outgoing Competent person.
9.3.2 COMPETENT PERSON TO LEAVE THE WORK SITE FOR A SHORT PERIOD
When a Competent Person to whom a Safety Document has been issued is unable to
continue doing the work or continue supervising the work, the following procedure must be
followed:
•
All persons in the working party must be withdrawn from the work area and warned
not to continue to work on the Equipment concerned.
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The Authorized Person will assess the work and decide to:
•
Keep the Safety Document open if the work area can be secured for the duration of
the absence of the Competent Person.
9.4 If a Safety Document is not to be cancelled immediately it has been cleared then it shall be
secured as specified in an Approved procedure.
10- CANCELLATION OF SAFETY DOCUMENTS
10.1 An Authorized Person shall cancel the Safety Document. He shall ensure that the Control
Person has been informed of the cancellation and any exceptions or restrictions affecting the
return to Operational Service of the equipment.
10.2 After cancellation of each Safety Document, the third copy is forwarded to the Control Person
for management control purposes.
11- RETURN TO OPERATIONAL SERVICE
11.1 Following the cancellation of all relevant Safety Documents the Control Person and the
Authorized Person shall arrange for the return of the Equipment to Operational Service.
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12- PROCEDURE FOR THE USE OF THE RECORD OF INTER-SYSTEM SAFETY
PRECAUTIONS (RISSP)
Definitions
• Requesting Safety Coordinator:
The Requesting Safety Coordinator is an Authorized Person responsible for achieving Safety
from the System for work to be done and is requesting a Point of Isolation to be established
on the other side of the Interface Boundary.
• Implementing Safety Coordinator:
The Implementing Safety Coordinator is an Authorized Person responsible for establishing a
Point of Isolation In his area of responsibility so that Safety from the System can be achieved
for work on the other side of the Interface Boundary.
12.1 The Requesting Safety Coordinator (Authorized Person):
Consult the Control Person and agrees on the Safety Precautions.
12.1.1 Contacts the Implementing Safety Coordinator.
12.1.2 Discusses the work to be carried out.
12.1.3 Agrees on the required Safety Precautions.
12.1.4 Assigns a unique number to the RISSP form.
12.1.5 Completes the Request Section of the RISSP form with the Agreed upon Required Safety
Precautions.
12.1.6 Enters the name of the Control Person on the document.
12.1.7 Delivers the RISSP form to the Implementing Safety Coordinator.
12.2 The Implementing Safety Coordinator:
12.2.1 On receipt of the RISSP, achieves the Safety Precautions agreed in accordance with inhouse Safety Practices.
12.2.2 Consult the Control Person and agrees on the Safety Precautions.
12.2.3 Completes the Implementation Section of the RISSP form.
12.2.4 Enters the name of the Control Person on the document.
12.2.5 Delivers the RISSP form to the requesting Safety Coordinator.
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12.3The Requesting Safety Coordinator;
12.3.1 Applies his lock as part of the Safety Precautions on the Implementing side or receive the
key safe key.
12.3.2 Completes the intended work in accordance with in-house Safety Practices.
12.3.3 Removes his lock from the safety precautions on the Implementing side.
12.3.4 Completes the Clearance Section of the RISSP form.
10.3.5 Delivers the RISSP form to the Implementing Safety Coordinator.
12.4The Implementing safety Coordinator:
12.4.1 On receipt of the RISSP, clears the Safety Precautions in accordance with in-house Safety
Procedures.
12.4.2 Completes the Clearance Confirmation Section of the RISSP form.
12.4.3 Delivers the RISSP form to the Requesting Safety Coordinator.
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13- SAFETY CLEARANCE DE-CLEARANCE CERTIFICATE (Announcement of
Application of SSR)
13.1 In order for primary Equipment to be covered by the System Safety Rules prior to connecting
to the System either electrically or mechanically, then a Safety Clearance Certificate or any
other mean of announcement shall be issued. This announcement shall define the Equipment
and shall include the specific time and date for the certificate to become effective.
13.2 Similarly, after complete isolation and disconnection from the System as a permanent removal
then a Safety De-Clearance Certificate or any other mean of announcement shall be issued.
13.3 The use of these Certificates / Announcement is primarily to ensure when the Equipment is/is not
subjected to the System Safety Rules
13.4 The O&M Director (Electricity / Water), is responsible for ensuring that Safety Clearance and
Safety De-Clearance Certificates or announcement are issued and circulated with adequate notice
to the appropriate parties. The actual preparatory work may normally be delegated to the
Planning Department.
13.5 Safety Clearance and De-Clearance Certificates or announcement shall be circulated to:

Projects directorate, ADWEA (if applicable)

Projects division manager, ADDC (if applicable)

Project consultant (if applicable)

Project contractor (if applicable)

Asset Management Director - ADDC

Construction Dept. Manager

HSEQ Manager, ADDC

Others (where applicable)
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14- CATEGORIES OF AUTHORISATION
14.1 The following categories of Authorization are recognized in the System Safety Rules. A person
may be appointed by an Authorization Officer of the Company for more than one of these
categories within the specified limits of Equipment and defined geographical areas
•
•
•
Competent Person (CP)
Authorized Person (AP)
Control Person (CN)
14.2 All Competency and Authorization Certificates shall clearly define the category of Competency
or Authorization together with the limits of the Equipment and any geographical or Location
limits.
15- CATEGORIES OF APPOINTMENT
15.1CP1 An individual who has sufficient technical knowledge and experience to recognize and
avoid Danger and carries out the duties of a Competent Person including Maintenance of
Equipment and the receipt and clearance of specified Safety Documents for HV Equipment.
avoid Danger and carries out the duties of Competent Person including Maintenance of
Equipment and the receipt and clearance of specified Safety Documents for LV Equipment.
avoid Danger and carries out the duties of Competent Person including Maintenance of
Equipment and the receipt and clearance of specified Safety Documents for Mechanical
Equipment.
15.4AP1 An individual who has sufficient technical knowledge and experience to recognize and
avoid Danger and carries out the duties of an Authorized Person including switching operation,
identify general safety, prepare, issue and cancel specified Safety Documents for HV
Equipment.
15.4.1 AP1a An individual who has sufficient technical knowledge and experience to recognize
and avoid Danger to carries out switching operation under instruction and direct supervision
of Authorized Person (AP1)
15.4.2 AP1b An individual (mainly contractor’s employee) who has sufficient technical knowledge
and experience to recognize and avoid Danger to carries out switching operation for private
substation/equipments connected with ADDC network for HV Equipment
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15.5 AP2An individual who has sufficient technical knowledge and experience to recognize and
avoid Danger and carries out the duties of an Authorized Person including switching operation,
identify general safety, prepare, issue and cancel specified Safety Documents for LV
Equipment.
15.5.1AP2b An individual (mainly contractor’s employee) who has sufficient technical knowledge
and experience to recognize and avoid Danger to carries out switching operation for private
equipments connected with ADDC network for LV Equipment
15.6 AP3 An individual who has sufficient technical knowledge and experience to recognize and
avoid Danger and carries out the duties of an Authorized Person including switching
operation, identify general safety, prepare, issue and cancel specified Safety Documents for
Mechanical Equipment.
15.7 CN1 An individual who has sufficient technical knowledge and experience to recognize and
avoid Danger and carries out the duties of Control Person for HV Equipment.
avoid Danger and carries out the duties of Control Person for LV Equipment.
avoid Danger and carries out the duties of Control Person for Mechanical Equipment.
15.10 OPERATIONAL AUTHORITY
“Operational and Safety Switching” requires selected Authorized Persons to have appropriate
written authority to render interlocks inoperative.
OA1 Written authority to render interlocks inoperative and to operate non-interlocked Equipment
to the instructions of a Control Person. (When accompanied by OA2)
OA2 Written authority to accompany and check that the instructions for rendering interlocks
inoperative are implemented on the correct Equipment and carried out in the proper sequence by the
instructed person.(Accompany and check operations performed by OA1)
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APPENDICES
APPENDIX 1
EARTHING ELECTRICAL POWERDISTRIBUTION EQUIPMENT
1 SCOPE
This Appendix applies the principles established by the Company System Safety Rules and
provides guidance on the positioning of Earthing Devices to achieve Safety from the
System for persons working on High Voltage (HV) and Low Voltage (LV) power
distribution Equipment.
Earthing is undertaken as part of the application of safety precautions to protect against the
effects of inadvertent energisation and induced voltages. It depends upon several factors
namely
2
•
The capacity of Primary Earths to carry the fault current until the electrical
protective devices operate and automatically disconnect the faulty Equipment
•
The speed of operation of the electrical protective devices
•
The rated voltage of the System
•
The voltage gradient to the earthing point
•
The fault level at the point of work
•
The effectiveness of the electrical connection between the HV or LV Equipment and
earth.
DEFINITIONS
For the purposes of this document the following definition applies
Metalclad Switchgear Movable Earths - Portable Primary Earths applied to metalclad
switchgear spouts before the issue of a Permit to Work. These earths can be removed and
replaced during the work one phase at a time.
LV Earthing Bond – Portable Primary Earths of adequate rating for connecting the phase
conductors of LV power distribution circuits to Earth, using Approved insulated hand
clamps.
Terms printed in bold type are as defined in the Company System Safety Rules.
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IDENTIFICATION OF EQUIPMENT
All Equipment on which work is carried out must be readily identifiable. Where necessary,
an Approved means of temporary identification must be attached where necessary, which
will remain effective throughout the duration of the work
4
DANGERS
The main Dangers to personnel applying Earthing Devices to Live Equipment are electric
shock, burns, or falling arising from
5
•
The application of Earthing Devices to Live Equipment
•
Badly connected or insecure Earthing Devices
•
The incorrect sequence or method of application or removal of Portable Earthing
Devices (refer sections 8.6, 8.7, 8.8 and 8.9)
•
The inadvertent earthing of adjacent Live Equipment by the loss of control of a
Portable Earthing Device.
REQUIREMENTS FOR PORTABLE EARTHS
5.1
Portable Earthing Devices must be applied and removed using an Approved
insulated earthing pole or insulated hand clamp.
5.2
In any cell or cubicle, all exposed conductors must be Isolated and Points of
Isolation established before any Portable Earthing Devices are applied.
5.3
Portable Earthing Devices must be routinely examined quarterly and also
immediately prior to use according to an Approved procedure. Defective Portable
Earthing Devices must be immediately withdrawn from service for repair or
replacement.
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6.1
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REQUIREMENTS FOR PRIMARY EARTHS
Primary Earths must be applied within the zone established by the Points of Isolation.
Where reasonably practicable, the Primary Earths must be positioned between the point
of work and all Points of Isolation, including the Point of Isolation from common neutral
earthing equipment, where appropriate.
6.2
Where Points of Isolation of a particular item of HV Equipment include LV connections,
and that item may, during the course of the work, become disconnected from the rest of the
Earthed HV Equipment in the Isolated zone, Primary Earths must be applied directly to
that Equipment. As an alternative, the work must be carried out in accordance with an
Approved procedure.
6.3 Primary Earths must be of adequate cross-sectional area and provide an efficient
connection between the general mass of earth and the Isolated Equipment. They must be
capable. of safely discharging the resultant fault current due to any inadvertent
energisation.
6.4
Where reasonably practicable, a fully rated fixed Earthing Device must be used to make
the first Primary Earth connection. Where this is not reasonably practicable an
Authorized Person must carry out an assessment to determine the safest way to earth the
Equipment. This may include the indirect application of Portable Primary Earths to the
Equipment through a circuit breaker.
6.5
If a circuit breaker is used the Authorized Person must consider its rating and the
clearance times of the electrical protective devices. These factors will influence whether the
tripping functions should be rendered inoperative before or after the circuit breaker is
closed. After closing, the circuit breaker should be Locked in the closed position. Where
reasonably practicable, local closing of a circuit breaker adjacent to the switchgear, to
provide an earth, should be avoided.
6.6
Where it is not reasonably practicable to apply Primary Earths between the point of work
and the Points of Isolation they may be placed in an alternative position so as to have a
similar electrical effect. Suitable positions are
6.6.1
On a permanent connection teed between the point of work and the Point of
Isolation at a distance not exceeding 9m (30ft) from the tee point, or
6.6.2
At a point not more than 9m (30ft) beyond the point of work from the Point of
Isolation, or
6.6.3
As defined in an alternative Approved procedure.
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6.7
For Sulphur Hexafluoride Gas Insulated Switchgear the distance of 9m (30 ft) in paragraph
6.6 can be relaxed to 30m (l00 ft) provided the full intent of paragraph 6.6 is maintained.
6.8
Primary Earths must be applied to all three phases except where work is carried out on
phase segregated HV Equipment. Examples of phase segregated HV Equipment are
400kV enclosed Sulphur Hexafluoride Gas Insulated Switchgear and generator terminal
connections. Both have conductors in individual single phase Earthed metal enclosures.
6.9
It is not necessary to earth every part of the Equipment within an Isolated System
provided that the requirements of the Company System Safety Rules are observed.
6.10 At certain Locations it may become necessary to apply more than one Portable Primary
Earth at each point of earthing to cater for the maximum fault level of the Equipment.
These Locations and the number of earths required should be specified in an Approved
procedure.
6.10 Here reasonably practicable, before Portable Primary Earths are applied, an Approved
voltage indicator must be used to verify that the conductor to be Earthed is not Live. The
voltage indicator must be tested immediately before and after use.
7
REQUIREMENTS FOR ADDITIONAL EARTHS
7.1 When work is to be done on Equipment under the terms of a Permit to Work or Sanction
for Test, and induced voltages may cause Danger, Additional Earths must be applied.
7.2 Where reasonably practicable, before Additional Earths are applied, an Approved voltage
indicator must be used to verify that the conductor to be Earthed is not Live. The voltage
indicator must be tested immediately before and after use.
7.3 Additional Earths must be applied and removed during the course of the work by the
recipient of the Permit to Work or Sanction for Test, or by a person under the direct
Supervision of the Safety Document recipient. They must be applied and removed in
accordance with the requirements of an Earthing Schedule.
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APPLICATION & REMOVAL OF EARTHING DEVICES
8.1 Fixed Earthing Devices when initially applied used as Primary Earths to establish Safety
from the System must be applied and removed by an Authorized Person to the instructions
of a Control Person .
8.1 An appropriately authorized Competent Person may apply and remove Primary Earths
under a Sanction for Test as the recipient of the Safety Document.
8.2 A Competent Person may apply and remove Additional Earths in accordance with an
Earthing Schedule under a Permit to Work or Sanction for Test.
8.3 When Portable Earthing Devices are to be applied, or issued under an Earthing Schedule
with a Permit to Work or Sanction for Test, only those Portable Earthing Devices
necessary for the immediate operations must be removed from storage.
8.4 Portable Earthing Devices must be returned to storage immediately after disconnection
from the Equipment and the cancellation of any associated Safety Document.
8.5 When a Portable Earthing Device is to be applied, the first operation must always be to
attach the earth end clamp to clean bare metal that is electrically bonded to earth. The
conductor end clamp can then be applied using an insulated earthing pole or insulated hand
clamp.
8.6 When a Portable Earthing Device is to be removed, it is essential that the conductor end
clamp is removed before the earth end clamp is detached.
8.7 When multiple Portable Earthing Devices have been used, and earth end clamps are in
close proximity to each other, all conductor end clamps must be removed before any of the
earth end clamps are removed or disturbed.
8.8 At no time must the conductor end clamp of a Portable Earthing Device be allowed to
remain connected when its earth end clamp has become detached. If this is the only earth on
the conductor at that point, an Additional Earth must be applied in parallel before the faulty
earth is removed.
8.9 Where multiple phase conductors on overhead lines are being Earthed, each individual
conductor must be Earthed unless they are solidly bonded electrically at or near the earthing
point.
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For the application or removal of Portable Primary Earths the Authorized Person
responsible must assess the inherent risks associated with loss of control of the
Approved earthing pole. The risk assessment must include
8.10.1
8.10.2
8.10.3
8.10.4
8.10.5
8.10.6
Any necessity for switching out adjacent Equipment
Confirmation that electrical protective devices are in service on adjacent busbars and
circuits
Confirmation that the points at which the Portable Primary Earths are to be
applied can be correctly identified and are of adequate capacity to safely discharge
the resultant fault current due to any inadvertent energisation
Confirmation that the points at which Portable Primary Earths are applied
conform to the distance requirements specified in paragraph 6.6
Confirmation that the points at which the Portable Primary Earths are applied do
not inhibit the operation of any electrical protective devices that are in service and
may be required to operate
Deciding whether a second person should be used to assist to help prevent loss of
control of the earthing pole.
8.11
If Primary Earths are not close to and visible from the point of work, the Authorized
Person must consider the need for the application of additional Earthing Devices at the
point of work. This requirement can be relaxed when there can be no doubt that the
correct Equipment is to be worked on and that there is no possibility of Danger from
induced voltages.
8.12
When Earthing Devices would prevent access to the point of work, and Danger could
arise from induced voltages, the Equipment must be efficiently connected to earth by
applying Additional Earths at the nearest convenient point. Additional Earths must be
applied in accordance with an Earthing Schedule. These Additional Earths may be
removed in turn as the work progresses but each earth must be replaced before another is
removed.
8.13
When work is to be done on the feeder or voltage transformer spouts of Metalclad
Switchgear, or on the busbar spouts of a single panel switchboard, Metalclad Switchgear
Movable Earths must be applied. These earths may be removed and replaced one phase
at a time during the progress of the work. Work may proceed on each spout after proving
that it is Dead by means of an Approved voltage indicator, applied immediately before
the work. The voltage indicator must always be tested immediately before and after use.
8.14
When work is to be done on the busbar spouts of a multi-panel switchboard, Primary
Earths must be applied to the busbars at one of the panels. Metalclad Switchgear
Movable Earths can then be applied to the spouts to be worked on and work can proceed
as paragraph 8.14 above.
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8.15
When HV or LV Equipment has been disconnected from all supplies and physically
removed from its service position, the use of Primary Earths or Additional Earths is
not necessary, provided that it is immediately electrically discharged.
8.16
Before a break is made in an electrical conductor or a connection is made across a break,
Danger that could arise from a voltage difference must be excluded. Earthing Devices
must be applied on both sides of and in close proximity to the point where a break or
connection is to be made.
8.17
At the discretion of an Authorized Person, following a comprehensive assessment of the
risks, Additional Earths may be issued to a competent contractor for application under
an Earthing Schedule associated with a Permit to Work.
8.18
Earthing positions may occasionally be above circuits which are Live. In such situations,
the Equipment must be Earthed at least at one point and an Approved procedure
followed to meet the requirements of paragraph 6.6.
8.19
Operation of Equipment during maintenance can disconnect the Primary Earth from
the point of work. This is permissible provided that the basic requirement of a Primary
Earth being between the point of work and Points of Isolation is maintained and
Danger from induced voltages is excluded.
8.20
When a generator transformer is connected to a generator turning on barring gear, care
mast be taken that the earth continuity through the windings is maintained If work on the
tap changer or windings is undertaken, any point of disconnection must first be bridged
This is to avoid an induced decaying High Voltage being produced across the
disconnection due to the collapse of a magnetic field associated with any small
circulating current in the transformer windings.
APPLICATION & REMOVAL OF PORTABLE EARTHING DEVICES
9.1 Primary Earths
9.1.1
Application or removal of Portable Primary Earths to establish Safety from the
System is carried out by the Authorized Person who has received the instruction, or
by him providing direct Supervision to a Competent Person
9.1.2
The Authorized Person in charge of the application and removal of Portable
Primary Earths must ensure that the objectives of the instruction are clearly
understood by all concerned in order to reduce the possibility of human error
9.1.3
The defeating of interlocks to permit application of Earthing Devices is prohibited.
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9.2 Additional Earths
9.2.1
Portable Additional Earths will be formally issued with a Safety Document. The
Authorized Person issuing the Safety Document will count the earths before issue
and agree the count with the recipient
9.2.2
The Competent Person receiving Portable Additional Earths with a Safety
Document will retain these earths in safe custody when they are not in use on the
System
9.2.3
The Authorized Person preparing an Earthing Schedule should assess the inherent
risks and may wish to specify on the Earthing Schedule when a second person
should be used.
9.3
Application or Removal of Portable Earthing Devices under a Safety Document
9.3.1
Portable Primary Earths can be removed and re-applied under a Sanction for Test.
Similarly Portable Additional Earths can be applied and removed under an
Earthing Schedule associated with a Permit to Work or Sanction for Test. In both
of these situations incorrect application or loss of control of the earthing pole could
lead to Danger
9.3.2
The Authorized Person/Competent Person responsible for the actual application or
removal of any form of Portable Earthing Device should assess the inherent risks
associated with the loss of control of the earthing pole and decide whether a second
person should be used to assist.
10 REQUIREMENTS FOR EARTHING LOW VOLTAGE PANELS
10.1
In order to maintain the 415 volt fused switches of outgoing circuits at the LV Panel,
it is necessary to establish Points of Isolation at each remote point, external to the
LV Panel.
10.2
Where the complex nature of the outgoing circuits makes the standard of isolation
required difficult to achieve with certainty, there is an unacceptable risk of reverse
energisation from the System. The risk arises from generators at consumers’
premises, possible cross connections, etc. and an alternative procedure must be
adopted to provide Safety from the System.
10.3
The alternative procedure relies upon Primary Earths on both sides of the point of
work to ensure a safe system of work.
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10.4
This alternative procedure will normally be applied during a full outage of the
11kV/415V four panel substations.
10.5
The Authorized Person shall establish Points of Isolation from the HV System and
open the 415 volt fused switches.
10.6
The Authorized Person shall check for and confirm no volts at the LV Panel
busbars using an Approved voltage testing device and then discharge the
Equipment. The voltage indicator must be tested immediately before and after use.
10.7
The Authorized Person shall then apply Primary Earths to the 415 volt LV
busbar.
10.8
The Bus Section circuit breaker must be closed to solidly earth both sections of the
LV Panel 415 volt busbar.
10.9
The Authorized Person shall check for and confirm no volts on the outgoing side of
the first 415 volt fused switch using an Approved voltage testing device. The
voltage indicator must be tested immediately before and after use.
10.10 The Authorized Person shall then close the first 415 volt fused switch to solidly
earth the outgoing circuit.
10.11 The LV Earthing Bond shall be connected to the substation earth then connected to
the outgoing side of the first 415 volt fused switch using an Approved insulated
hand clamp. With both sides of the fused switch solidly connected to earth, open the
fused switch.
10.12 For all other fused switches repeat items 10.9, 10.10 and 10.11 for each switch.
10.13 Where the Authorized Person assesses the work and finds that there is not enough
space in the panel to apply all the insulated hand clamps, Safety from the System
must be established in consultation with the Control Person using an Approved
Procedure.
10.14 The Authorized Person shall then issue a Permit to Work or Sanction for Test as
required.
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OPERATIONAL AND SAFETY SWITCHING
SCOPE
This Appendix describes the procedure to be adopted when carrying out High Voltage
(HV) Operational and Safety Switching operations on any System operated by the
Company.
2.
DEFINITIONS
For the purposes of this document the following definitions apply
Operational Switching - the operation of circuit breakers, disconnectors and Isolating
Devices to the instructions of a Control Person.
Safety Switching - the operation of disconnectors, Isolating Devices, application of
Primary Earths and Shorting Switches, and removal of fuses and links to the
instructions of a Control Person to achieve Safety from the System.
3 IDENTIFICATION OF EQUIPMENT
All Equipment on which work is carried out must be readily identifiable. A means of
temporary identification must be attached where necessary, which will remain effective
throughout the duration of the work.
4 PREPARATION FOR SWITCHING
4.1 All Switching, except for emergency Switching, must be carried out to the instructions of the
appropriate Control Person.
4.2 Agreed routine Switching is that carried out in accordance with an Approved procedure.
4.3 Before issuing Switching instructions, that may affect an adjacent System(s), the appropriate
Control Person must consult with the other Control Person(s) responsible for the adjacent
System(s).
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5 HIGH VOLTAGE SWITCHING - OTHER THAN FOR EMERGENCY
PURPOSES
5.1 Before HV Operational and Safety Switching instructions are issued by the appropriate Control
Person, they must be recorded giving the name of the Location(s) at which the instructions are
to be carried out, the circuit name and full identification of the Equipment involved and the
effect of the operations.
5.2 The Control Person must give HV Operational and Safety Switching instructions direct to the
Authorized Person who is going to carry out the operation.
5.3 When Portable Primary Earths are to be applied or removed to achieve Safety from the
System, the instructions must be given directly to an Authorized Person.
5.4 When HV Operational and Safety Switching is to be carried out by a person under training, he
must be under the Supervision of an Authorized Person who has also received the instructions
direct from the Control Person.
5.5 The Control Person must give HV Operational and Safety Switching instructions to the
Authorized Person in two parts as detailed below:
5.5.1
An explanation of the overall objective of the subsequent operations including the identity
and Location of the Equipment involved. It is not necessary to record this part of the
instruction
5.5.2
The formal precise instructions should follow a standard pattern and include
•
The names of the Control Person giving the instruction and Authorized Person
receiving the instruction
•
The Location at which the Equipment operates
•
The actual operational requirement
•
The time and date of the instruction
5.6 The Authorized Person recipient of the HV Operational and Safety Switching instructions
must write them down and repeat them back phrase by phrase as received. At the end of the
message the instructions must be read back in full to ensure that they have been accurately
received and understood. The instruction should be recorded in the Log Books at the substation
and Control Center before the instruction is carried out.
SYSTEM SAFETY RULES
IR.GN.01
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5.7 When carrying out HV Operational and Safety Switching instructions the recipient must observe
the following requirements
5.7.1
The Authorized Person must be deliberate, neither rushing nor causing undue delay and
must take nothing for granted
5.7.2
The Authorized Person must take with him the written instruction, consulting it and
checking that he is on the correct Equipment before taking any action
5.7.3
The Authorized Person must then pause and recheck his proposed action before proceeding
5.7.4
After carrying out each operation the Authorized Person must tick off that operation and
check by all means readily available that each step has been satisfactorily completed
5.7.5
When a piece of Equipment shows any sign of distress, its condition must be reported
immediately to the appropriate Control Person before continuing with the instructions. All
persons must be warned that a potential hazard exists
5.7.6
Before an overhead line or cable circuit earth switch is closed, any Circuit identification must
be checked and added to the instruction by the Authorized Person.
5.7.7
Equipment that is normally Locked must only be unlocked immediately before being
operated and then relocked immediately after it has been operated
5.7.8
The recipient must also endorse his instructions with the time of the completion of the
operation or sequence of operations.
5.8
Following HV Operational and Safety Switching the recipient of the instructions must
comply with the following requirements
5.8.1
Record the time of completion of the operations, together with any Circuit Identification
5.8.2
Report back to the appropriate Control Person the operations carried out, the time of
completion and any Circuit Identification involved.
5.9
The appropriate Control Person must record the completion of the HV Operational and
Safety Switching and any Circuit Identification. He must also give the sender confirmation
of the time of receipt which must be recorded together with the name of the Control Person.
He must also acknowledge, by repeating back to the sender, any relevant additional
information passed to him.
5.10
All recorded Operational and Safety Switching instructions must be written legibly and
indelibly. Records should be retained for a minimum period of one year.
SYSTEM SAFETY RULES
IR.GN.01
6
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HIGH VOLTAGE SWITCHING - EMERGENCY CONDITIONS
6.1 Where HV Operational and Safety Switching has taken place under emergency
conditions and without instruction from the appropriate Control Person, the Authorized
Person must inform the Control Person as soon as possible after the operation. All
relevant details must be recorded.
6.2
When Equipment trips under fault conditions, the Authorized Person must first cancel
the audible alarms. He must then report, as soon as possible, to the Control Person the
time of the operation and details of annunciations, together with any relay indications
available in the substation control room. These details must be recorded.
6.3
If any relay indications are not available in the control room, the Authorized Person
must report this to the Control Person who will decide when these indications are to be
obtained. The annunciator display and relay indications must be recorded before
resetting the relays.
6.4
When the Control Person instructs action to restore Equipment which has tripped
under fault conditions, the Authorized Person receiving the instruction must ensure that
the trip relays are reset before attempting to close any circuit breaker.
6.5
When Equipment in normal operational service is showing signs of distress it must not
be operated and all persons must be kept clear of such Equipment. Operational
Switching must be carried out as soon as possible so that the potentially hazardous
Equipment concerned can be discharged and removed from service, without it being
subjected to further operations.
7
DEFEATING THE FUNCTION OF INTERLOCKS
7.1
When it is required to defeat the functions of interlocks the appropriate Control
Person must give the instructions to an Authorized Person who has written authority
to “render interlocks inoperative”.
7.2
The appropriate Control Person must then repeat the instructions to a second
Authorized Person who has written authority to accompany and check the
instructions are implemented on the correct Equipment and carried out in the right
sequence by the original Authorized Person.
7.3
There are times particularly during commissioning that interlocks have to be defeated
in order to prove the operation of the interlocking scheme or to apply certain tests.
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IR.GN.01
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This work must be undertaken during outage conditions when the Equipment is
Isolated, Points of Isolation established and Safety Documents ( issued.
7.4
However, the defeating of interlocks can only be done by an Authorized Person or
the Authorized Person responsible for the work after consulting the appropriate
Control Person. On completion of the tests correct operation of Interlocking must be
proven.
10
8
OPERATION
OF
NON-INTERLOCKED
BUSBAR
DISCONNECTORS FROM THE LOCAL POSITION
SECTION
8.1
Operational Switching instructions for the operation of these disconnectors must be
given by the Control Person to an Authorized Person with the appropriate written
authority.
8.2
The instructions must then be repeated to a second Authorized Person with the
appropriate written authority to accompany and check.
9
OPERATION
OF
NON-INTERLOCKED
BUSBAR
DISCONNECTORS FROM THE REMOTE POSITION
9.1
Operational Switching instructions for the operation of these disconnectors must be
given by a Control Person to an Authorized Person with the appropriate written
authority. Before the instructions are issued the Control Person must confirm with
the Authorized Person the busbar running arrangement.
SECTION
LOW VOLTAGE AND MECHANICAL SWITCHING
10.1
Operational and Safety Switching for LV and Mechanical Equipment must be
carried out in accordance with the broad principles specified in Section 5 above.
SYSTEM SAFETY RULES
IR.GN.01
APPENDIX 3
1
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SULPHUR HEXAFLUORIDE (SF6) SWITCHGEAR
SCOPE
This Appendix applies the principles established by the Company System Safety Rules to
achieve Safety from the System for personnel working on switchgear which contains, or
has contained, Sulphur Hexafluoride (SF6) gas, including brief General Safety guidance
for maintenance work.
2
DEFINITIONS
Gas Zones - Discrete items of Equipment which may be independently Isolated and
drained of Sulphur Hexafluoride. A Gas Zone may comprise
A single-phase enclosure
A single enclosure containing the three phases of an item of Equipment
Three single-phase enclosures of a common item of Equipment connected by inter-phase
pipe work.
3
SYSTEM SAFETY RULES
IR.GN.01
4
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DANGERS
The main Dangers to personnel from Equipment containing Sulphur Hexafluoride gas
are
•
•
•
•
•
5
Asphyxiation
Electric shock or burns
Release of stored mechanical energy or hydraulic pressure
Exposure to toxic gas breakdown products which are formed within the
Equipment
Gaining access to Live conductors as a result of human error.
SULPHUR HEXAFLUORIDE GAS CHARACTERISTICS
Sulphur Hexafluoride is an invisible, tasteless, non-inflammable and chemically stable
gas. The decomposed gas products are not an explosion or fire risk. The gas is heavier
than air and therefore any leakage collects at the lowest levels by displacing air from cable
trenches, basements, pits, etc. near or below floor level.
Periodic gas tests must be undertaken, as a routine maintenance activity, and these should
concentrate on the lower level spaces where the gas may collect. It is essential that proper
and effective ventilation is provided before personnel access is permitted and those
conducting gas tests must be particularly careful and vigilant.
6
PREPARATION FOR WORK ON SF6 SWITCHGEAR
6.1
GAS PRESSURE
Where the integrity of an HV Point of Isolation is dependent on the presence of SF6
gas, the gas density must be monitored throughout the period of work. This function
may be performed by an automatic alarm system. Care must be taken that if such a
system is used it is in service and that it has been regularly tested and maintained.
Where reasonably practicable, the alarm system must be tested to prove its operation at
low density immediately prior to the establishment of an HV Point of Isolation. Any
loss of gas density must be reported immediately to the Authorized Person in charge of
the work and the Control Person at the Distribution Control Center.
SYSTEM SAFETY RULES
IR.GN.01
6.2
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BOUNDARY IDENTIFICATION OF SAFE WORKING AREAS
The boundaries of the Equipment on which it is safe to work must be clearly identified.
Demarcation can be difficult in integrated Sulphur Hexafluoride substations because of
the close proximity of adjacent circuits. This must be done carefully and in accordance
with the requirements of the Company System Safety Rules.
6.3
WHEN GAS DEPRESSURISATION IS NOT REQUIRED
If depressurizing is not required to allow work to be done, the following precautions
must be taken to achieve Safety from the System, either
6.3.1
Limiting the work or work area, followed by the issue of a Limited Access Permit if
appropriate, or
6.3.2
Applying appropriate safety precautions, followed by the issue of a Permit to Work or
Sanction for Test.
6.4
WHEN GAS DEPRESSURISATION IS REQUIRED
When depressurization is required the following precautions must be taken to achieve
Safety from the System
6.4.1 Where work is to be undertaken that will expose the High Voltage connections within
the switchgear, it must first be disconnected from all possible sources of electrical
energy and Points of Isolation established.
6.4.2 The conductors must be Earthed between all Points of Isolation and the work in
accordance with the Company System Safety Rules. Detailed provisions for earthing
High Voltage Equipment are contained in Appendix 1.
6.4.3 The Equipment Gas Zone(s) must be drained of SF6 gas and this must be carried out in
accordance with an Approved procedure
6.4.4 If an Authorized Person requires a specific Recommendations for General Safety
Report, a Permit to Work must be issued to the appropriately qualified specialist to
allow internal access to the Gas Zone
6.4.5 A Permit to Work or Sanction for Test must be issued for the work to proceed and
where appropriate the Recommendations for General Safety Report must specify the
further precautions to be taken to deal with any arc products that may be present. The
removal, using a special dedicated vacuum cleaner, and disposal of any arc products
must be in accordance with an Approved procedure.
SYSTEM SAFETY RULES
IR.GN.01
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7
MAINTENANCE ACTIVITIES
7.1
Normal opening of the circuit breaker causes the Sulphur Hexafluoride gas to partially
decompose. This also happens for an internal electrical fault within any Gas Zone, as a
result of the electrical arcing. Solid as well as gaseous secondary products of the gas
decomposition are formed and visible as dust deposits. When the decomposition
products are exposed to humid air, they combine to form sulphur dioxide and
hydrofluoric acid and have an unpleasant odour.
7.2
The maintenance inspection of Gas Zones or chambers, which have contained Sulphur
Hexafluoride gas, must be undertaken with caution. Cover plates giving access to
portable maintenance earthing positions must be clearly identified. Each position must
also be uniquely identified on the enclosure adjacent to its access cover. They must not
be opened for inspection until the switchgear room has been thoroughly ventilated to the
external environment. Particular care must be exercised with the effective ventilation of
all lower level spaces where gas may collect.
7.3
Personal protective clothing must be worn which includes protective gloves and an
effective facemask with an air filter. It is important that the decomposed gas is not
inhaled, and therefore that the facemask has an effective seal to the face.
7.4
Products of decomposition must not be allowed to make contact with the skin. Should
accidental skin contact occur, then any contact with moisture must be avoided until the
solid decomposition products have been carefully removed. Following removal any
affected skin must be liberally washed with large quantities of water.
SYSTEM SAFETY RULES
IR.GN.01
APPENDIX 4
1
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METALCLAD SWITCHGEAR
SCOPE
This Appendix applies the principles established by the Company System Safety Rules
to achieve Safety from the System for personnel working on the busbar, voltage
transformer and feeder spouts of High Voltage (HV) metalclad switchgear, including
work on circuit breakers removed from the service position.
2
DEFINITIONS
Metalclad Switchgear Movable Earths - Portable Primary Earths applied to metalclad
switchgear spouts before the issue of a Permit to Work. These earths can be removed
and replaced during the work one phase at a time.
3
4
DANGERS
The main Dangers to personnel working on metalclad switchgear are electric shock or
burns, arising from
•
The application of Earthing Devices to Live Equipment
•
The incorrect sequence and method of application or removal of Earthing
Devices
•
Gaining access to Live conductors as a result of human error.
SYSTEM SAFETY RULES
IR.GN.01
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5
BUSBAR SPOUTS OF A MULTI-PANEL SWITCHBOARD
5.1
WORK WITHOUT USING METALCLAD SWITCHGEAR MOVABLE EARTHS
When work is to be carried out on the busbar spouts without using Metalclad
Switchgear Movable Earths, the following must be carried out in strict sequence
5.1.1
The section of busbars on which work is to be carried out must be Isolated from all
points of supply from which it can be made Live, including any voltage transformers.
Points of Isolation must then be established
5.1.2
Where duplicate switches in one tank, or on-load busbar selector isolators are
installed, and it is impossible to isolate them from all points of supply, then additional
precautions must be taken. All switches that can be closed on to the busbars on
which work is to be carried out must be rendered inoperative by having their
mechanisms Locked in the open position
5.1.3
The shutters of spouts which are, or may become, Live must be Locked closed.
Shutters of spouts on which work is not to be done must also be Locked closed
except for the busbar spouts at which the Primary Earths are to be applied
5.1.4
Primary Earths must be applied, in accordance with Appendix 1, on the busbars at a
panel other than that on which work is to be carried out. Inserting the hand or any
tool into contact spouts for this purpose is strictly forbidden. Where reasonably
practicable, all Primary Earths must be Locked in the Earthed position
5.1.5
A Permit to Work must be issued
5.1.6
Work on the busbar spouts must be carried out under the Supervision of a
Competent Person who must prove each spout Dead by means of an Approved
voltage indicator applied immediately before the work. The voltage indicator must
always be tested immediately before and after use
5.1.7
If it is necessary to carry out work on the spouts of the panel on which the Primary
Earths have been applied, then after work on the available busbar spouts has been
completed, the Permit to Work must be cleared and cancelled. The Primary Earths
must be removed and replaced on the busbar spouts of another panel on the same
section of busbar. The procedure detailed in 5.1.5 and 5.1.6 must now be repeated.
SYSTEM SAFETY RULES
IR.GN.01
5.2
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WORK USING METALCLAD SWITCHGEAR MOVABLE EARTHS
When work is to be carried out on the busbar spouts using Metalclad Switchgear
Movable Earths, the following operations must be carried out in strict sequence
5.2.1
The section of busbars on which work is to be carried out must be Isolated from all
points of supply from which it can be made Live, including any voltage transformers.
Points of Isolation must then be established
5.2.2
Where duplicate switches in one tank, or on-load busbar selector isolators are
installed, and it is impossible to isolate them from all points of supply, then additional
precautions must be taken. All switches that can be closed on to the busbars on
which work is to be carried out must be rendered inoperative by having their
mechanisms Locked in the open position
5.2.3
The shutters of spouts which are, or may become Live must be Locked closed.
except for the busbar spouts at which the Primary Earths are to be applied
5.2.4
Primary Earths must be applied, in accordance with Appendix 1, on the busbars at a
panel other than that on which work is to be carried out. Inserting the hand or any
tool into contact spouts for this purpose is strictly forbidden. Where reasonably
5.2.5
Metalclad Switchgear Movable Earths must be applied by an Authorized Person to
all phases on the busbar at the point of work
5.2.6
5.2.7
To enable the work to be carried out, the Competent Person may remove the
Metalclad Switchgear Movable Earths one phase at a time. The Competent Person
must replace each phase earth so removed before another phase earth is disturbed
5.2.8
If it is necessary to carry out work on the spouts of the panel on which the Primary
Earths have been applied, then after the work on the available busbar spouts has been
completed, the Permit to Work must be cleared and cancelled. The Primary Earths
must then be removed and replaced on the busbar spouts of another panel on the same
section of busbar. The procedure detailed in 5.2.5, 5.2.6 and 5.2.7 must now be
repeated.
SYSTEM SAFETY RULES
IR.GN.01
6
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FEEDER SPOUTS, VOLTAGE TRANSFORMER SPOUTS AND SINGLE
PANEL BUSBAR SPOUTS
6.1 WORK WITHOUT USING METALCLAD SWITCHGEAR MOVABLE EARTHS
When work is to be carried out on feeder spouts, voltage transformer spouts and single
panel busbar spouts without using Metalclad Switchgear Movable Earths, the following
operations must be carried out in strict sequence
6.1.1
The spouts on which work is to be carried out must be Isolated from all points of
supply from which the spouts can be made Live. Points of Isolation must then be
established
6.1.2
The shutters of spouts which are, or may become Live must be Locked closed.
6.1.3
Primary Earths must be applied, in accordance with Appendix 1, to the circuit at
each point of work and within all Points of Isolation except where such Points of
Isolation are on the Low Voltage side of a transformer. Inserting the hand or any
tool into contact spouts for this purpose is strictly forbidden. If reasonably
6.1.4
When the Primary Earths would prevent access to the point of work, then before a
Permit to Work is issued alternative Primary Earths must be applied as close as is
reasonably practicable to the point of work. If this cannot be achieved, then whilst
this work is in progress no other work must be carried out on the circuit connected to
the spouts being worked on. Where the spouts are connected to a circuit on which
there is any likelihood of induced voltages occurring, Additional Earths must,
where reasonably practicable, be connected at the nearest point to the point of work
where access to the conductors can safely be obtained
6.1.5
6.1.6
Work on the spouts must then be carried out under the direct Supervision of the
Competent Person who must prove each spout Dead by means of an Approved
voltage indicator immediately before the spout is worked on. The voltage indicator
must be tested immediately before and after use.
SYSTEM SAFETY RULES
IR.GN.01
6.2
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WORK USING METALCLAD SWITCHGEAR MOVABLE EARTHS
When work is to be carried out on the feeder spouts, voltage transformer spouts and
single panel busbar spouts using Metalclad Switchgear Movable Earths, the following
operations must be carried out in strict sequence
6.2.1
The spouts on which work is to be carried out must be Isolated from all points of
supply from which the spouts can be made Live. Points of Isolation must then be
established
6.2.2
The shutters of spouts which are, or may become, Live must be Locked closed.
6.2.3
Primary Earths must be applied, in accordance with Appendix 1, to the circuit at
each point of work and at all Points of Isolation except where such Points of
Isolation are on the Low Voltage side of a transformer. Inserting the hand or any
tool into contact spouts for this purpose is strictly forbidden. If reasonably
6.2.4
On the feeder, voltage transformer or busbar spouts on which work is to be carried
out, the Primary Earths must be replaced by Metalclad Switchgear Movable Earths
6.2.5
If there are no other Primary Earths left on the circuit connected to the spouts being
worked on, then while this work is in progress, no other work must be carried out on
that circuit. Where the spouts are connected to a circuit on which there is any
likelihood of induced voltages occurring, Additional Earths must, where reasonably
practicable, be connected at the nearest point to the point of work where access to the
conductors can safely be obtained
6.2.6
a Permit to Work must be issued
6.2.7
To enable the work to be carried out the Competent Person may remove the
Metalclad Switchgear Movable Earths one phase at a time. The Competent Person
must replace each phase earth so removed before another phase earth is removed.
SYSTEM SAFETY RULES
IR.GN.01
7
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WORK ON CIRCUIT BREAKERS REMOVED FROM SERVICE
7.1
When work is to be carried out on a circuit breaker that has been removed from its
service position and electrically discharged, and transported to a workshop or similar
area, the formal requirements of the Company System Safety Rules do not apply.
7.2
If the work is to be carried out in a switchroom, the shutters of any available busbar
feeder or other spouts that are, or may become, Live must be Locked closed. If an
Authorized Person decides it is necessary to confirm instructions in writing he must
issue a Limited Access Permit.
SYSTEM SAFETY RULES
IR.GN.01
APPENDIX 5
1.
Effective Date :
Issue: 2
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LIVE WASHING PROCEDURES for HV INSULATION
SCOPE
achieve Safety from the System for personnel using portable equipment to wash Live 33kV
insulation on gantries, in open type substation compounds and on High Voltage overhead
lines.
2.
DEFINITION
3.
All Equipment on which washing is to be carried out must be readily identifiable. Where
necessary an Approved means of temporary identification must be attached where necessary,
which will remain effective throughout the duration of the work and removed on completion
of the work.
4.
DANGERS
The main Dangers to personnel washing insulators on overhead lines and in open type
substation enclosures containing Live Equipment are electric shock or burns due to
•
•
•
5.
The washing equipment becoming Live
Electrical flashover
Inadequate earthing of the washing equipment
GENERAL REQUIREMENTS
5.1 APPLICATION OF LIVE WASHING
5.1.1 Live washing is the normal cleaning procedure for High Voltage insulation
at 33kV. In this case the auto re-closer device at both ends of the circuit
shall be blocked to avoid any re-closing. This work should be carried out
under a Limited Access Permit.
5.1.2 If an overhead line or substation can be readily de-energized without
interruption to consumers, or increased costs, then washing de-energised is
preferred. Washing de-energized permits the use of water with higher
conductivity values.
SYSTEM SAFETY RULES
IR.GN.01
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5.2
The Control Person must be informed before the start of washing, when it is
completed and any auto reclose equipment switched out.
5.3
A trained Competent Person must do the setting up and positioning of the equipment
and the carrying out of the washing. He must wear Approved rubber gloves and
suitable protective clothing. There must be effective communication between all
members of the washing crew throughout the progress of the work.
5.4
The equipment must have a nozzle that breaks the water jet into a water droplet spray
before reaching the Live insulator being washed.
5.5
The nozzle, and any other metal parts of the equipment must be electrically bonded
together and the equipment Earthed by a suitable earthing lead which has a crosssection of not less than 70 sq. mm copper equivalent.
5.5.1
The Earthing lead must be uncoiled from the take-up reel and should not form coils
or loops that can have an inductance resulting in a high voltage induced voltage
across the earthing lead.
5.5.2
The Earthing lead must be connected to a dedicated earth point on the structure. The
earthing lead clamp must make intimate contact with the earth connection point.
5.6
Only Approved washing equipment must be used that is designed specifically for
washing energized systems. This equipment must have fitted to it a device to monitor
the conductivity of the water. The monitoring device should sound an audible alarm
should the conductivity exceed the pre-determined level, and must operate an
automatic pump cut-out device to prevent further washing. The automatic cut-out
device must be tested daily prior to washing commencing.
5.7
The equipment and the Competent Person carrying out the washing must be not less
than 5m (16 ft) away from the insulator(s) being washed and care must be taken that
5.7.1
no other Live conductor at a lesser distance is inadvertently sprayed
5.7.2
not more than one phase is washed by the same washer gun
5.7.3
no two insulators less than 5m (16 ft) apart which are at different potentials are
washed by the same jet
5.7.4
the washer unit is solidly connected to earth at all times. At no time during the
washing must the operator step off the Earthed metal or accept materials from, or
make physical contact with, any persons not in the same Earthed environment.
When it is necessary to stand on an Earthed steel structure that supports energized
SYSTEM SAFETY RULES
IR.GN.01
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conductors, the wash gun nozzle shall be solidly bonded to the same steel structure
with a heavy duty conductor which has a cross-section of not less than 70 sq. mm
copper equivalent
5.7.5
washing is carried out in such a manner that any overspray shall fall only on clean
insulation
5.7.6
A trained Competent Person must determine, dependent upon the proximity of
adjacent Live Equipment, the need for any special working arrangements that may
include defining the extent of the working area.
5.8
Water washing must be discontinued in the event of
5.8.1
A local lightning risk or
5.8.2
Wind speeds being too high to enable the operator to reliably control the jet.
5.9
The conductivity of the water used must not exceed 20 micro mhos. A Competent
Person must check the conductivity of the water immediately before washing
commences and when the source of water changes. In addition
5.9.1
Water with the lowest conductivity shall be used when washing energized circuits, in
accordance with the technical recommendations
5.9.2
A portable tester shall be used for checking the water conductivity prior to every
filling of the washer tank
5.9.3
As conductivity of water increases with temperature, any water that remains in the
water tank during hot weather shall be tested again immediately prior to use for
insulation washing. The trigger on the gun shall also be opened to flush out any
residual warm water from the hose prior to further insulator washing.
5.10
In addition to low conductivity, other chemical properties of the water are important.
The pH value should be neither alkaline nor acidic and the Chloride content should be
as low as possible.
5.11
Insulators on Wood Pole Structures shall not, under any circumstances, be Live line
washed with the hose operator standing on or near the Wood Pole supporting the
energized conductors.
5.12
Lightning Arrestors, Capacitor Voltage Transformers, insulators forming Points of
Isolation and SF6 Bushings shall not be washed energized.
SYSTEM SAFETY RULES
IR.GN.01
6
7
8
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WATER PRESSURE
6.1
Water pressures of between 400 to 550 psi at the nozzle shall be maintained.
6.2
Lower pressures necessitate decreased distance and reduce cleaning ability. Higher
pressures give greater reach but only marginal improvement in surface cleaning.
6.3
Water stream break-up at the higher operating pressures can make it more difficult for
the wash gun operator to see clearly and remain on target.
STRUCTURE AND LINE CONFIGURATION
6.4
Washing insulation on double circuit overhead lines shall be scheduled so that wind
does not carry over-spray across adjacent lines.
6.5
Horizontal tower configuration shall be washed starting with the down wind insulator
string.
6.6
Vertical construction shall be washed starting with the bottom phase and then
working up.
WASHING PRACTICES
6.7
Training is provided for Live washing crew members in both the operation of the
washing equipment and the washing techniques and practices required for safe
operation. Trained and authorized Competent Persons must carry out the washing
as follows
6.7.1
for Small Pin and Post type insulators, the water stream shall be directed to cover the
complete insulator
6.7.2
for Large Pin and Post type insulators, two guns shall be used washing
simultaneously from opposite directions. Washing with two guns shall also be used
in congested areas.
6.7.3
for vertical insulators - start at the bottom and work upwards
6.7.4 for horizontal insulators - start with the downwind end insulators
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6.7.5
for Single String Suspension Insulators, the water stream shall be directed at
approximately a 45 degree angle. Washing starts from the conductor end and works
upward to the supporting structure. Continually rinse the lower insulator surfaces to
wash off dirty water dripping from upper insulators.
6.7.6
for Double String Suspension Insulators, the bottom four insulators shall be washed
on both strings. Before proceeding to wash the complete strings, the lower insulator
surfaces shall be continually rinsed as outlined for Single String Suspension units
above.
8.1.7
for “V” String Suspension Insulators, two guns shall be used, washing each string
simultaneously. Before proceeding to wash the complete strings, the four insulator
sheds at the lower end shall be washed, as described for Double String Suspension
units above.
6.7.7
for Single String Tension Insulators washing shall be started from the downwind end
in groups of four to six units. When all units are washed then the complete string is
rinsed.
6.7.8
for Double String Tension Insulators washing shall be started from the downwind
end in groups of four to six units, beginning with the string furthest away. Four to
six units must have been washed on the string furthest away before moving to the
closest string and then continuing as described for Single String Tension units above.
6.7.9
for Tension Insulators with combination Jumper Suspension Insulators, the Tension
Insulators are washed first as described for Single or Double String Tension units
above, then the Jumper Suspension units shall be washed, starting at the conductor
end, in the same manner as Single String Suspension Insulators.
7
WIND CONDITIONS
7.1
Wind direction is a very important consideration. The wash gun
position should be selected to ensure that any over-spray is blown
away from all contaminated insulation.
7.2
The wind direction shall determine the starting position for washing on horizontal
insulator strings, horizontal post type insulators and double circuit overhead lines.
7.3
In conditions of no wind, overspray may wet contamination on adjacent insulators
making it necessary to wash a number of insulators in each string (refer to Double
String Suspension Insulators), before any complete string is washed. After a number
of insulators are washed in each string, the same procedure shall be used as for wind
conditions to complete the washing operation.
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8
WASHING CREW
8.1
The washing crew shall consist of a minimum of three, including two
Competent Persons. The team comprises a Linesman trained and
certificated as a wash gun operator, a crew member to operate the water
pump and a third man to act as flagman and perform duties assigned by the
supervisor. The supervisor may add additional assistance if considered
necessary.
8.2
Washing in developed urban areas requires particular attention, where
property damage or public dissatisfaction may result from water overspray.
Advance notification should be provided to those who may be affected,
together with appropriate protective measures to minimize the possibility of
damage.
8.3
When a Live washing supervisor or foreman is not in direct
charge, the wash gun operator shall take responsibility for the
entire crew.
SYSTEM SAFETY RULES
IR.GN.01
APPENDIX 6
1
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OVERHEAD LINES
SCOPE
This Appendix provides brief guidance on safe working practices associated with the
overhead lines forming part of the interconnected System.
2
DEFINITIONS
Operational Switching – the operation of circuit breakers, disconnectors and Isolating
Safety Switching – the operation of disconnectors, Isolating Devices, application of
Primary Earths and Shorting Switches, and removal of fuses and links to the instructions
of a Control Person to achieve Safety from the System.
3
All Equipment on which work is carried out must be readily identifiable. Where
necessary, an Approved means of temporary identification must be attached where
necessary, which will remain effective throughout the duration of the work.
4
DANGERS
The main Dangers to personnel from overhead lines are
•
Falling from height (See Work at Height)
•
•
Circuit identification errors
•
Induced voltages and voltage differences at the point of work.
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OVERHEAD LINES
5.1
5.2
The climbing for any purpose, other than authorized Live line work, on towers or
supports carrying Live High Voltage conductors is strictly forbidden.
Where work is to be undertaken on any part of a High Voltage overhead line, it must
first be disconnected from all possible sources of electrical energy and Points of
Isolation established.
5.3
The conductors must be Earthed on each side of the work Location with Primary
Earths, normally at the Substations at each end of the circuit. To protect against
induced voltages, Additional Earths must also be applied to the conductors each side
of the point of work, and as near to the work Location as practicable.
5.3.1
The Additional Earths on both sides of the workplace must be connected to an
Approved Earth reference point. The method to establish an Approved earth
reference point is described in an Approved procedure.
5.4
Detailed provisions for earthing High Voltage Equipment and Operational and
Safety Switching are contained in Appendices 1and 2.
5.5
For all work on overhead lines, the Permit to Work will be issued at a substation that
is connected to one end of the overhead line. Operational and Safety Switching at the
remote substation end(s) of the overhead line circuit will be co-ordinate by the
Control Person.
5.6
Full safety harnesses or safety belts must be worn and used whilst working on any
High Voltage overhead line tower or support. In addition, it is also mandatory to
wear personal protective equipment that is appropriate for the work being undertaken.
5.7
All persons climbing or working on overhead line towers will be under observation at
all times by a second person at the base of the tower.
5.8
For work on painting or maintenance of overhead line towers, the work can be carried
out in two stages.
5.8.1
If the work is on the lower part of the tower and is carried out under a Limited
Access Permit the towers on which work is being carried out shall be on the line of
sight of the Competent Person and shall not exceed five.
5.8.2
If the work is on the upper part of a double circuit tower, where one circuit is alive
and the second circuit is Isolated and Earthed, work is allowed under a Permit to
Work on the half of the tower associated with the Isolated and Earthed circuit. The
number of towers under the supervision of one Competent Person should not exceed
two.
See Appendix 19 for Public Work near overhead lines.
SYSTEM SAFETY RULES
IR.GN.01
APPENDIX 7
1.
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UNDERGROUND CABLES
SCOPE
This Appendix provides guidance on safe working practices associated with the
underground cables forming part of the interconnected System.
2.
DEFINITIONS
Safety Switching – the operation of disconnectors, Isolating Devices, application of
Primary Earths and Shorting Switches, and removal of fuses and links to the
instructions of a Control Person to achieve Safety from the System.
3.
necessary an Approved means of temporary identification must be attached where
necessary, which will remain effective throughout the duration of the work.
4.
DANGERS
The main Dangers to personnel from underground cables are
•
Injuries as a result of excavation collapse
•
•
Circuit identification errors
•
Induced voltages and voltage differences at the point of work
•
Chemicals and fumes from fluxes
•
Gas release from pressurized cables.
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UNDERGROUND CABLES
5.1
Where work is to be undertaken on any part of a High Voltage underground cable, it
must first be disconnected from all possible sources of electrical energy and Points of
Isolation established.
5.2
Detailed provisions for earthing High Voltage Equipment and Operational and Safety
Switching are contained in Appendices 1and 2.
5.3
Access to underground cable circuits requires careful excavation to expose the outer
surfaces of the cable external protection. Excavation must be carefully controlled to
avoid damage to any underground services and will normally require trench
reinforcement, as the excavation proceeds, to protect against the Danger of excavation
collapse.
5.4
Before any High Voltage underground cable is cut, the following procedure must be
adopted
5.4.1 The Competent Person in charge of the work must satisfy himself that the cable has
been made Dead, Points of Isolation established and Earthed in accordance with the
Company System Safety Rules.
5.4.2 Dead cables shall be positively identified, as far as reasonably practicable, using cable
records in conjunction with a cable location detector, prior to any cable spiking operation.
5.4.3 No other work shall be undertaken in the vicinity of either the Dead circuit, or any
adjacent cable circuit, during a cable spiking operation.
5.4.4 The Control Centre must be informed of any proposed cable spiking operation
immediately prior to the work commencing. Constant contact will be maintained with
the Control Centre, throughout the cable spiking activity, to confirm that there is no
adverse effect on the remainder of the System.
5.4.5 The Competent Person should consider the cable circuit construction and any
requirement for special jointing techniques, including insulated working, prior to the
commencement of work.
5.4.6 The Competent Person, using a cable spiking gun from a safe distance, should drive a
spike into the cable cores at the point where the cable is to be cut.
5.4.7 Immediately after spiking circuit breakers connected to any cables in the vicinity of that
spiked should be checked for fault operation.
If a Live cable is spiked in error there may not always be an explosion at the spiking site.
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5.4.8
When removing the gun the Competent Person should check that the spike has cut
through into one phase core and the Earthed metallic sheath pr two phase cores in the
case of an unarmoured cable.
5.4.9
The Competent Person should then demonstrate to the cable jointing team that it is
now safe to cut the cable immediately adjacent to the embedded cable spike.
5.4.10 After the cutting of any cable, the Competent Person should confirm the electrical
continuity of the cable in both directions prior to the commencement of work in
accordance with an Approved procedure.
5.5
No person must touch the insulation surrounding any High Voltage cable, unless the
circuit has been made Dead, Points of Isolation established and Earthed in accordance
with the Company System Safety Rules.
5.6
Work on live Low Voltage underground cables is forbidden.
5.7
Before any Low Voltage underground cable is cut the Authorized Person or
Competent Person in charge of the work must satisfy himself that the cable has been
made Dead and Points of Isolation established in accordance with the Company
System Safety Rules. He must then drive a spike into the cable cores with a cable
spiking gun using a safe and Approved method.
SYSTEM SAFETY RULES
IR.GN.01
APPENDIX 8
1
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SPECIAL PROVISIONS FOR MECHANICAL EQUIPMENT
SCOPE
This Appendix expands and reinforces the provisions specified in the Company System
Safety Rules and provides specific guidance on the requirements when working with
certain items of Mechanical Equipment. It addresses briefly a number of different
situations that require the issue of a Mechanical Permit to Work.
2
DEFINITIONS
3
All Equipment on which work is to be carried out must be readily identifiable. A
means of temporary identification must be attached where necessary, which will remain
effective throughout the duration of the work.
4
DANGERS
The main Dangers to personnel from Mechanical Equipment are:
•
Asphyxiation in confined spaces
•
The sudden release of stored mechanical energy or pressure
•
Burns from hot surfaces
•
Insecure hand and footholds
•
Falling
•
Toxic effects of chemicals or fumes
•
Entrapment due to moving parts
•
Injury from contact with rotating equipment.
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5
GENERAL REQUIREMENTS FOR MECHANICAL SYSTEMS
5.1
A Mechanical Permit to Work is required for many workplace situations and
examples include work
•
•
•
•
•
In all confined spaces
On pressure vessels and pipe work
On or near overhead crane tracks or other Equipment
On circulating water systems
On Equipment containing or operated by compressed air or gas
5.2
Where work is to be carried out on machinery that is driven by a prime mover, Points
of Isolation for the prime mover must be established. Special precautions may be
necessary in the case of fans, where natural draught may cause rotation despite
isolation of the prime mover.
5.3
The Authorized Person issuing a Mechanical Permit to Work must be satisfied that
the Equipment has been correctly isolated in accordance with the Company System
Safety Rules. For complex isolations, an Approved isolation specification should be
prepared in advance of the work.
6
MECHANICAL WORK GUIDELINES
6.1
6.1.1
General
Before work is commenced on any plant, physical isolation and locking of the plant
from all sources of danger shall be adopted as the prime safety precaution. This
should also include purging, venting, draining and release of stored energy where
applicable.
6.1.2
When work is to be carried out on machinery that driven by the prime movers,
starting devices, the switch isolator or valves controlling the supply of energy to the
prime mover, must be locked in the position which prevents the prime mover from
starting and the key locked in the Lock out Board.
6.1.3
Special precaution may be necessary in the case of fans where natural draught may
cause rotation despite isolation of prime mover.
6.1.4
The Authorized Person issuing Mechanical Permit to Work must ensure himself
that the plant has been correctly isolated in accordance with the approved isolation
specification. If an approved isolation specification is not available the Authorized
Person will prepare one, which ensures that the requirements stated above have been
complied with.
SYSTEM SAFETY RULES
IR.GN.01
6.2
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WORK INSIDE BOILER FORCED DRAUGHT AND FUEL GAS PASSAGES
The procedure for the preparation of Permit to Work for entry into boiler forced
draught and fuel gas passages shall be as follows:
6.2.1

The boiler shall be out of service and:
Every precaution shall be taken to prevent leakage of fuel into the combustion
chamber by isolating locking off and fixing danger notice to all sources of supply to
the firing and ignition equipment.
In the case of HRSG (Hear Recovery Steam Generation) boilers the Gas Turbine
must be shutdown and isolated, if satisfactory positive isolation is not available / not
possible.
6.2.2
The gas paths shall be cooled and sufficient venting of gases and fumes shall be
ensured
6.2.3
The forced draught fan circuit shall be isolated position with a danger notice
attached.
6.2.4
The soot blowing steam supply shall be locked and electrical control to this
equipment made inoperative with the danger notice attached.
6.2.5
A Permit to Work (Mechanical) may be issued.
6.3
WORK INSIDE VESSELS (INCLUDING BOILERS)
The procedure for preparing a Permit to Work for entry into a vessel shall be as
follows:
6.3.1
The vessel shall be depressurized and empty, purged and decontaminated (where
appropriate) with all vents opened to atmosphere.
6.3.2
All valves through which dangerous fluids may enter the vessel shall be locked in the
closed position with danger notices attached and wherever possible a double shut off
shall be made.
6.3.3
Note: A non-return valve shall not be considered as a shut off valve unless it is capable
of being locked shut.
6.3.4
Any mechanical or electrical equipment within the vessel shall be isolated by the
locking off the starter and attaching a danger notice.
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6.3.5
The vessel shall be adequately ventilated and oxygen level shall be monitored.
6.3.6
Whenever any hot work is to be done in a confined space, all gas cylinders shall be
kept outside the tanks, vessel, or boiler.
6.3.7
One person shall remain outside the opening of the confined space, e.g. tanks, vessel,
and boiler on stand by while work is being carried out within the confined space.
6.3.8
A Permit to Work (Mechanical) may then be issued.
6.4
WORK INSIDE WATER DUCTS TUNNELS
The procedure for preparing a Permit to Work for entry any tunnel, pipeline, duct or associated
pump or equipment shall be as follows:
6.4.1
The system shall be drained and isolated from all sources of danger by ensuring that:
6.4.1.1 All manually operated valves are locked in the closed position with
Caution Notice attached.
6.4.1.2 All motor operated valves, sluice gates etc. are closed and the fuses of the
operating motor power supply are removed and Caution Notice attached
6.4.2
Suitable checks shall be taken to ensure there are no hazardous gases present.
Adequate venting and / or forced ventilation should be provided.
6.4.3
6.5
WORK ON TANKS AND VESSELS
6.5.1
No person shall enter a vessel which has been emptied / purged of flammable or other
hazardous substance until an Authorized Person is satisfied by testing that all
dangerous vapors or gases have been expelled and the vessel is ventilated.
6.5.2
If vessel is so big that only vapor / gases at points of entry can be tested, then
breathing apparatus to be made compulsory for all internal work.
6.5.3
Smoking and exposed flames are prohibited within and in the vicinity of open vessels,
machines or switch gear which had contained oil or any other flammable substances.
6.5.4
Work on such vessel involving the application of heat is forbidden until all practical
steps have to prevent fire or explosion and a Hot Work Permit, confined space permit
have been issued.
6.5.5
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IR.GN.01
6.6
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WORK ON PRESSURE VESSELS, PRESSURE PIPE LINES etc.
6.6.1
Pressure vessel or pipelines shall be isolated and prepared for work in the following
manner. All supply and delivery sources shall be isolated and locked shut with danger
notice attached. The vessel shall then be depressurized by draining and vented until
atmospheric condition prevails. Care must be taken in preventing a back feed of
drainage.
6.6.2
Safety valves and pressure gauges shall be thoroughly examined and tested every 2
Years or from time to time as found necessary.
6.6.3
For a pressure pumps and rotating machines the following procedures for isolation
shall be adopted.

6.7
The machine shall be out of service and at rest. All suction discharge leak off and
other valves connected to outside sources of supply should be shut and locked off
with danger notices attached. The electrical supply point isolator shall be opened and
locked inoperative with a danger notice attached.
The equipment shall be drained and vented until atmospheric condition prevails.
WORK ON POWER DRIVEN MACHINE (INCLUDING CRANES & LIFTING
TACKLE)
6.7.1
No person shall climb on any crane or other lifting machines without the knowledge
of the driver operating the crane / lifting devices.
6.7.2
Annual testing and certification of all lifting tackles is mandatory.
6.7.3
No person shall work on or near the wheel track of an overhead crane or traveling
crane in any place where he would be liable to be struck by the crane unless effective
measures have been taken by warning the crane drivers or otherwise to ensure that the
crane dose not approach within 20 ft of place of work. This applies to hoists and
lifting devices. Appropriate DANGER NOTICE shall be placed at places of work and
isolation.
6.7.4
Where possible electrical and / or mechanical isolation shall effectively be ensured.
6.7.5
SYSTEM SAFETY RULES
IR.GN.01
APPENDIX 9
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PROVISIONS FOR PHYSICAL AND CHEMICAL ENVIRONMENTS
1 SCOPE
This Appendix provides general guidance on safe working practices associated with a
range of potentially hazardous physical and chemical environments. It also provides
general guidance on the use of tools.
2 DEFINITIONS
For the purpose of this document the following definitions apply
Hot Work – any work activity, including grinding, cutting and welding, which may produce
heat, sparks or flames.
Pyrophorics – substances that may spontaneously ignite after drying out in the presence of
oxygen.
Combustible - substance capable of igniting and burning readily.
Confined Space - A space large enough for a person to bodily enter and perform assigned
work, has limited or restricted means of entry and exits, and is not designed for continuous
employee occupancy.
EXCAVATION. Work, excavations, drilling, boring, construction, demolition or surface
removal or penetration in any manner of owned property, streets, alleys, easements, or
public lands within the corporate limits.
Self-contained breathing apparatus (SCBA) – a device worn to provide breathable air in a
hostile environment. The breathing set is not dependent on a remote supply (e.g., through a
long hose). An SCBA typically has three main components: a high-pressure tank, a pressure
regulator, and an inhalation connection, connected together and mounted to a carrying
frame.
WHIMIS – Workplace Hazardous Materials Information System for chemical classification
and communication.
Terms printed in bold type are as defined in the Company System Safety Rules
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3 IDENTIFICATION OF EQUIPMENT
4 DANGERS
The main Dangers to personnel in hazardous environments are
•
Asphyxiation
•
Burns
•
Fire and explosion
•
Falling (See Work at height)
•
Electrocution
5 FIRE PREVENTION
5.1
The precise nature of the fire precautions required at a workplace depend upon several
factors including the building layout, building construction, type of work and the
number of persons that may be exposed to the fire risk.
5.2
For work that includes welding, gas cutting, grinding or chipping operations, a Hot
Work Permit to Work must be obtained before the work commences.
5.3
Before welding or cutting a pipe, tank or similar container that has held flammable
material, thorough forced ventilation and nitrogen purging shall be carried out to
remove all explosive vapours.
5.4
When Hot Work is planned in the vicinity of automatic fire protection equipment the
person responsible for site safety must be informed before the work commences.
5.5
A Hot work permit shall be obtained whenever such work is to be undertaken
5.6
All flammable gas cylinders and associated Equipment shall be inspected periodically
and detailed records maintained. The Equipment must also be visually inspected
immediately prior to use. Gas cylinders shall be stored and secured in an upright
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position, handled with care and kept cool away from all sources of heat. Under no
circumstances should oil or grease be used in the vicinity of Oxygen Equipment.
Fire fighting facilities and Equipment are to be used only for fire protection.
5.8
When a fire extinguisher is discharged the appropriate department must be informed
immediately so that the unit can be refilled and made ready for further use.
5.9
The use of petrol, or other highly inflammable liquids, as cleaning agents is strictly
prohibited.
5.10 Naked flames, or non-explosion proof equipment, must not be taken into battery
rooms.
6 HAZARDOUS CHEMICALS
6.1
Special care is required when using potentially hazardous chemical substances.
6.2
Strong alkalis, such as caustic soda and lime and strong acids, such as hydrochloric and
sulphuric, can cause serious chemical burns to the skin and are particularly hazardous to
the eyes. Use of these chemicals must be controlled, but where they must be handled
appropriate personal skin and eye protection must be worn. If these chemicals come into
contact with any part of the human body, wash immediately and thoroughly with large
quantities of water.
6.3
Deposits found in natural gas systems (pipes, etc.) may be Pyrophoric. Natural gas
systems must therefore be thoroughly washed out with water before opening for internal
inspection. Condensate and water washed from natural gas systems must be collected in
proper containers and disposed of in a safe manner.
6.4
All potentially hazardous chemicals must be stored in a well ventilated, dry and cool
place in suitable vessels.
6.5
When handling hazardous and/or new chemicals, a Chemical Hazard Risk Assessment
must be undertaken and communicated to concerned staff.
6.6
Reference to potentially hazardous chemicals and materials shall be made according to
the WHIMIS for chemical classification and communication already in place.
6.7
Laboratory Safety Rules must be observed by all staff entering the laboratory (See
Laboratory Safety Rules)
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7 HAZARDOUS GASES
7.1
Gases can present a particular hazard because some are neither visible or have any
distinguishing smell.
7.2
Chlorine is a highly toxic gas and is 2.5 times heavier than air. Every building
housing chlorine plant must be efficiently ventilated and the apparatus maintained to
minimize leakage and prevent any accumulation of dangerous concentrations.
Suitable detectors shall be used where there is a possibility of chlorine gas leakage,
alternatively if these are not readily available, an ammonia solution detector should
be used where appropriate.
7.2.1 Chlorine must be stored away from any source of combustion such as organic
chemicals, agitation, sunlight and high temperatures.
7.2.2
Chlorine cylinders, piping, valves, metering equipment and cylinders shall be made of
materials that are corrosion resistant.
7.2.3
Chlorine tanks must have a fusible plug to prevent rupture of tank at high
temperature.
7.2.4
Workers using must have a self-contained breathing apparatus (SCBA) and attend
specific safety training.
7.3
Nitrogen and carbon dioxide will not sustain life. Any vessel, pipe or culvert, which
may contain these gases, must be thoroughly purged with air before any person is
allowed to enter.
7.4
When there is a possibility that hazardous gases may be present in any confined space
Authorized Person must test the atmosphere and verify that it is safe for work.
Thereafter suitable detectors must be located in the confined space and suitable
respirators must be available outside to meet any emergency. A standby man, in
permanent contact with the personnel working within the confined space, must be
posted at the entrance. Rescue and emergency procedures should be practiced
periodically.
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8 IONISING RADIATION
8.1
Only a competent and qualified contractor will be permitted to use ionizing radiation on
the Company premises. All sources of radiation must be strictly controlled.
8.2
Before bringing a source of ionizing radiation onto the Company premises, the
contractor must obtain permission from a suitably trained Authorized Person. The
Authorized Person may decide to take further advice from a recognized specialist in the
control of radioactive sources. The procedures to be followed regarding the safe
transport, receipt, registration, storage and use of the source of ionizing radiation must be
agreed with the Authorized Person with special responsibilities for ionizing radiation.
8.3
When ionizing radiation processes are in progress, radiation Danger notices must be
prominently displayed and the area barriered off to prevent personnel from entering the
hazardous area.
8.4
All individuals engaged in radiography shall be equipped with a film badge and
dosimeter.
8.5
Only licensed radiographers with proper radiation monitoring equipment, including a
survey meter, may enter the demarcated area.
9 TOOLS AND EQUIPMENT
9.1
Each individual is responsible for ensuring that the tools and equipment he uses in the
course of his duties are maintained in a safe and effective condition.
9.2
Portable electrical tools must operate with a supply voltage of 110 volts or less, unless
special facilities have been provided to protect the user from electric shock, such as the
inclusion of a residual current device in the power supply.
9.3
Only non-sparking (explosion proof) Equipment shall be used when there is any danger
of inflammable gases or vapors existing. Also, only non-sparking tools shall be used in
natural gas or gas oil equipment.
9.4
When high pressure hydro-jet cleaning equipment is used the supervisor must take the
necessary precautions to protect personnel in the vicinity of the activities from accidental
impact from the water jet.
9.5
Rotary grindstones must be mounted with care, in accordance with the manufacturer’s
instructions, and use of the side of a rotary stone for grinding is strictly prohibited.
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Grinders shall be permanently equipped with guards, and personnel in the vicinity of any
grinding operation must wear suitable eye protection.
9.6
9.7
10
During welding operations:
9.6.1
The work piece and the welding machine must be effectively earthed to the same
point using clamps or bolted connections
9.6.2
Welding shields must be worn by welders and precautions taken to protect
personnel in the vicinity from the risk of weld flash
9.6.3
When welding in confined spaces, effective measures must be adopted to remove
weld fumes and vent them safely to atmosphere.
Before commencing any work with a ladder:
9.7.1
It must be inspected to ensure that it is in sound condition
9.7.2
It must be secured to prevent it from slipping either by footing by a second
person, lashing or shoring.
HAZARDOUS MATERIALS
10.1 The use of asbestos is strictly prohibited.
10.2 When handling hazardous and/or new chemicals, a Chemical Hazard Risk Assessment
OR Material Safety Data Sheet (MSDS) must be undertaken and communicated to
concerned staff.
10.3 Reference to potentially hazardous chemicals and materials shall be made according to
the WHIMIS for chemical classification and communication already in place.
SYSTEM SAFETY RULES
IR.GN.01
APPENDIX 10
ARRANGEMENTS
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OPERATIONAL AREAS – ACCESS & WORKING
SCOPE
This Appendix outlines the principles for maintaining high security standards and
appropriate standards of personal and operational behavior, in prohibited and restricted
areas such as Power Stations, Indoor Substations, High Voltage switching compounds,
Transformer bays, etc. The Appendix is complementary to the Company System Safety
Rules and provides general guidance when working on operational premises, on or near
electrical and mechanical Equipment.
2-
DEFINITIONS
Devices to the instructions of a Control Person
Terms printed in bold type are as described in the Company System Safety Rules.
3-
necessary, and Approved means of temporary identification must be attached which
will remain effective throughout the duration of the work and removed on completion of
the work.
4-
DANGERS
The main Dangers to personnel working on operational premises result from failure to
observe appropriate standards of behavior when gaining access to, or working in,
controlled environments.
55.1
5.2
ACCESS AND EXIT ARRANGEMENTS
All prohibited and restricted areas must remain securely Locked at all times. The
external main entrance gate of primary substations must be securely Locked, after
gaining authorized entry for work, to prohibit the entry of any unauthorized persons.
Security personnel routinely man external entrances to Power Station sites.
Authorized and some Competent Persons will be issued with appropriate Master Keys,
for access to prohibited and restricted areas, as determined by their designated
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competency. The issue of Master Keys will be recorded and requires acknowledgement
by a signature of receipt.
5.3
Authorized and Competent Persons issued with Master Keys are required to retain
them in safe custody in their personal possession and ensure that prohibited and
restricted areas are safe to enter.
5.4
An alternative emergency exit must be provided for the personal safety of employees or
contractors working within a prohibited or restricted area. To ensure an escape route is
readily available in an unforeseen emergency, two alternative exits must be available for
all work on the premises. Emergency exit routes must be provided without reducing the
essential high security standard demanded for prohibited or restricted areas.
In Substations or Pumping Stations where gases are used in fire fighting systems, before
entering any room, the operation switch for fire fighting protection shall be changed
from automatic position to manual position to avoid any mal operation while working
inside. In locations where the operation switch is marked ON/OFF, it shall be changed to
the OFF position. After completing the work and/or leaving the room, the operation
switch shall be set back to automatic or to ON where applicable.
5.5
5.6
Persons to whom keys have not been issued can only gain access to Prohibited or
Restricted Areas if they are in possession of a Safety Document or under Supervision
of an Authorized or Competent Person.
5.7
Contractors can only gain access to Prohibited or Restricted Areas if they are in
possession of a Safety Document or under Supervision of an Authorized or
Competent Person.
5.8
The issuing of Keys to give access to Prohibited or Restricted Areas where assets of
another company are also located is described in the Connection and Interface
Agreement between the companies for that specific Location.
5.9
On completion of the work, or other maintenance activity, it is the responsibility of the
Authorized or Competent Person in charge to ensure that all access gates, doors and
windows are closed and securely Locked. Prior to leaving the area, all surplus
equipment and material must be removed and the premises left clean.
SYSTEM SAFETY RULES
IR.GN.01
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COOD OF PERSONAL BEHAVIOUR
6.1
A high standard of personal behavior is always essential at workplaces in operational
premises. Each employee must behave at all times in a manner conducive to his own
personal safety and the safety of other persons. Practical jokes, arguments and similarly
irresponsible behaviors are forbidden.
6.2
Each supervisor is responsible for the safety standards of his subordinates.
6.3
Protection and safety interlock systems are designed to protect employees from incorrect
actions and human errors and contribute considerably to maintaining high safety
standards. In very exceptional circumstances, trained and duly accredited Authorized
Persons, can seek specific permission to defeat these important safety provisions.
6.4
Hazard warning signs must be observed and obeyed at all times.
6.5
All smoking inside electrical premises is strictly forbidden. Smoking, or the use of open
flames in the vicinity of evaporating combustible liquids, or whilst opening oil filled
containers or similar Equipment is also strictly forbidden.
6.6
Naked flames, or other ignition sources, must not be taken into battery rooms.
7-
CODE OF OPERATIONAL BEHAVIOUR
7.1 Learn and obey the Company System Safety Rules. They are drawn up for your
personal safety and the safety of those working with you. Any breach of the mandatory
Company System Safety Rules is a disciplinary offence. Ignorance of the System Safety
Rules will not be accepted as an excuse and will be treated as neglect of duty.
7.2
Carry a personal System diagram at all times when on duty. Ensure that it is always up
to date and consult it regularly.
7.3
Never run in a substation or similar operational enclosure.
7.4
Understand the Equipment you are required to operate. Always ask if in doubt and
never experiment with Live electrical Equipment.
7.5
During any Operational Switching, only those Authorized or Competent Persons
necessary for carrying out the operations should be in the vicinity of the switchboard.
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7.6
Do not trust your memory. Always consult your High Voltage Switching Schedule (or
Maneuvering Form) immediately prior to acting upon each item. Pause and think before
you act. All actions should be deliberate and never impulsive.
7.7
When instructed by telephone, write down the Operational Switching instructions and
read them back to the originating Control Person for confirmation.
7.8
Enter the Operational Switching instructions in the control room Log Book immediately
before the operation. Read it back to yourself and check that the entry correctly sets
down all you intend to do. When the Operational Switching has been completed, insert
the time of the operation in the Log Book alongside the original instruction.
7.9
Check and confirm the title of the circuit before undertaking any Operational Switching.
If in doubt ask.
7.10 Check the service position of each switch prior to all Operational Switching. Is it in the
position (closed, open or earthed) that you expected from your Operational Switching
instruction? If it is not find out why.
7.11 If a circuit breaker trips immediately on closing, always establish the reason before
attempting to reclose.
7.12 All relay flag indications that have operated must be correctly recorded before resetting.
7.13 When leaving a substation gate unattended make sure that it is securely Locked.
8-
PERSONAL PROTECTIVE CLOTHING AND EQUIPMENT
8.1
Since it is not always possible to remove workplace hazards at source, personal
protective equipment may be required to adequately control the employees’ exposure
to risk. All personal protective equipment must be suitable for the protection required
and properly maintained.
8.2
Overalls, head protection, eye protection, gloves and safety footwear are available to
all employees. Each individual is responsible for ensuring that appropriate protective
clothing is worn in potentially hazardous areas.
8.3
Specialist safety equipment such as breathing apparatus or waterproof overalls may
be required in particular situations. Each supervisor is responsible for ensuring that
the appropriate personal protective clothing and equipment is used in any potentially
hazardous situation.
SYSTEM SAFETY RULES
IR.GN.01
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ACCIDENTS AND INCIDENTS
9.1 Any injury resulting from an accident must receive medical attention as soon as possible.
9.2 Serious incidents must always be investigated thoroughly and reported to the appropriate
supervisor. All ‘near misses’ should also be investigated and reported to confirm that
safety measures were adequate and learn for future similar situations.
9.3 Accident and incident investigations and reporting procedures should be in accordance
with the detailed Company provisions.
10-
GENERAL HOUSEKEEPING
10.1 Good housekeeping and tidy workmanship are pre-requisites for
accident prevention.
Effective standards must therefore be
maintained in all workplace activities.
10.2 Safety equipment and First Aid appliances shall only be used for the purpose intended.
Portable fire extinguishers and guidance notes on artificial respiration techniques are
available in strategic locations at operational premises.
10.3 Each employee is encouraged to advise his supervisor of any potentially serious safety
hazard, so that immediate action can be taken to correct the situation.
SYSTEM SAFETY RULES
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SAFETY RULES FOR VISITORS
All visitors shall abide by the following Rules to ensure the implementation and maintenance
of safety for all ADDC visitors.
1) All visitors must adhere in detail to Safety, Health and Security rules and procedures.
2) All visitors shall be given and shall wear appropriate PPE for the duration of their visit.
3) All visitors must carry/wear a badge or other identification supplied by ADDC Security.
4) The use of or possession of prohibited substances are not permitted on ADDC premises.
5) All unusual incidents should be reported immediately to the ADDC HSEQ Department or
Security immediately (Accidents, injuries, damage to property, fires, etc.).
6) ADDC office and facilities are non smoking areas, visitors are required to follow the no
smoking policy
1. The following areas may be used by contractors/visitors unless otherwise stated:
Entrance
Break Area
Lunch Area
Toilet Facilities
Smoking Area
Material Storage Area
Parking Area
2. Areas visited must be as clean and orderly as possible as they were at the start of the visit.
3. Visitors shall dial the emergency contact number in case of emergency (emergency numbers
are posted in the buildings.
4. Visitors in case of emergency shall follow the fire warden instruction and follow the floor
employees to the assembly point
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APPENDIX 11
Procedure for Approval of Authorized, Competent & Control
Persons and Contractor's Competent & HSE Staff
1
Purpose
The purpose of this procedure is to formalize, simplify and organize the system by which ADDC
and Contractors can get an approval for the Authorised, Competent and HSE staff to comply with
the ADDC System Safety Rules.
2
Scope
The scope of this procedure covers approval for the following category of personnel:
•
•
•
•
All the ADDC Authorised, Competent and Control Personnel
Contractor's Competent personnel
Private Electrical Equipment Authorized Person
Contractor's HSE personnel
3
4
Definitions & Terminology
3.1 ADWEA, Abu Dhabi Water and Electricity Authority
3.2 ADDC, Abu Dhabi Distribution Organization
For reference, refer to Definition Guidelines GL.GN.01
Documents
The following documents are required for commencing the approval process:
4.1 ADDC Staff (New Certificate)
Nomination letter addressed to HSEQ Manager signed by the Function Manager.
Nomination form filled and signed by his direct in-charge defining the scope of the
certificate and declarations that the nominated person has been trained on site and
technically meets the ADDC requirements.
HSE training certificate
Personal Photo
4.2 ADDC Staff (Renewal)
Renewal letter addressed to HSEQ Dept signed by the Function Manager.
Nomination form filled and signed by his direct in-charge defining if there is any change
in the scope of his certificate.
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4.3 Contractor's Competent Person
Nomination letter addressed to HSEQ Dept and signed by the concerned Function
Manager
Nomination form approved by Project Consultant and ADDC Project Engineer
The Candidate’s C.V
Qualification certificates
Experience: Minimum three years experience in large size organization
Fire Fighting Training certificate
First Aid training certificate
Passport copy with valid Company Visa
Personal Photo
4.4 Contractor's HSE staff
Nomination letter Addressed to HSEQ Dept and signed by the concerned Function
Manager
Nomination form approved by Project Consultant and ADDC Project Engineer
The candidate’s CV with Qualification and Experience Certificates
Qualification: BSc Engineering / Engineering Diploma, HSE Qualification
Experience: Minimum three years experience in large size organization
HSE training certificates (as per the Scope of the Contract)
First Aid training certificate
Personal Photo
4.5 Private Authorized Person
Nomination letter addressed to Asset Management Directorate
Nomination form approved by Project Consultant / owner and ADDC Engineer
The Candidate’s C.V with (minimum 3 years Experience as operation engineer)
Qualification certificates (minimum engineering qualification)
HSE Training certificate (can be done in ADDC – Additional cost required)
First Aid training certificate (can be done in ADDC – Additional cost required)
Personal Photo
5 Process
According to ADDC IMS Policy and ensuring the compliance of ADDC Staff and Contractors
working on behalf of ADDC with ADDC’s System Safety Rules & IMS, Local and International
HSE Standard Procedures, ADDC HSEQ Manager has established this procedure for the
approval of Authorised, Competent and Control personnel of ADDC and Contractor's Competent
and HSE staff as follows:
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6 ADDC Staff approval
6.1 New certificate (Attached Process)

The employee must be qualified and experienced to cover his scope (as defined in the
System Safety Rules)
The employee must be trained on site to be familiar with the System Safety Rules
requirements.
Nominated person's Function Manager should submit the nomination form (Form:
FM.HSQ.125) to HSEQ Dept clearly defining the scope of certificate.
HSEQ Dept to arrange an appointment for written exam and oral interview for the
nominated person.
Nominated Person must have undergone HSE training (conducted by HSE staff)
Nominated person must undergo written HSE exam (pass mark is 80%)
Nominated person must undergo Oral HSE interview.
Those who successfully pass the test will be issued a CARD for a period of Two Years.
Those who fail to qualify will be given a month’s time to study before allowed to reappear again.
Those who fail to qualify for two times would be subject to interview by a committee set
between HSEQ and the nominated Function.
6.2 Renewal Certificate

Nominated person's Function Manager should submit nomination form (Form:
FM.HSQ.125) for renewal, clearly defining if there are any changes in his scope.
If there are any changes in the scope of the certificate, the nominated person must attend
HSE training followed by written and oral test to ensure that he is covering the new scope
then follow the closes
If there are No changes in his scope, the nominated person will be given refresher HSE
training and oral interview then the new certificate issued.
7 Contractors Competent Person
7.1 New Certificate

The contractor should submit the required document as defined above.
The Document will be evaluated by HSEQ Dept. and the nominated person will be called
for HSE Exam and Interview.
Nominated person must undergo written HSE exam. (Pass mark 80%)
Those who successfully pass the written exam will be subject to an Oral Interview.
Competent Certificate will be issued to those who successfully pass the Written and Oral
test as per the Scope of the Project (contract) for one year only.
Those who fail to qualify will be given a month’s time to study before being allowed to reappear again.
Those who fail to qualify for two times would be rejected.
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7.2 Renewal Certificates

The Contractor has to submit the nomination form approved by the Project Consultant and
ADDC Project Engineer along with the old certificate.
The process will be the same as new issue process.
8 Contractor / Consultant HSE staff
8.1 New certificate

The Contractor / Consultant has to submit the documents as defined.
The documents will be evaluated by HSEQ Dept .
The nominated person MUST fully understand the project HSE Plan and ADDC HSE
Requirements and he shall work only for the designated project.
If the nominated person meets ADDC requirements, then he will be called for HSE Exam
and Interview.
HSE Certificate will be issued to those who successfully pass the Written and Oral test as
per the Scope of Project (contract) for one year only.
Those who fail to qualify will be given a month’s time to study before being allowed to reappear again.
Those who fail to qualify for two times would be rejected.
8.2 Renewal Certificate

The Contractor / Consultant should submit the nomination form approved by the Project
Consultant along with the old certificate.
The process will be the same as new issue process.
9.
Private Electrical Equipment Authorized Person
9.1 New Certificate

The Owner should submit the required document as defined above.
The Document will be reviewed and evaluated by Asset Management Directorate the
nominated person will be interviewed by AMD Engineer to ensure understanding of
limitation of the work and interface boundaries with ADDC if PASS then will forward to
Operation Department (DMS) for Technical interview
Network Operation Department will interview the nominated person if PASS then will be
forward to HSEQ Dept. for HSE training, Exam and interview
Nominated person must trained and undergo written HSE exam. (Pass mark 80%)
Those who successfully pass the written exam will be subject to an Oral Interview.
Authorized Certificate will be issued to those who successfully pass the Written and Oral test
as per the Scope of the authorization for one year only.
Those who fail to qualify would be rejected.
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9.2 Renewal Certificates

The owner has to submit the nomination form approved by the AMD along with the old
certificate.
The nominated person will be subject to a refresh training course then re-issued with the new
certificate
If the scope of the certificate changed then the process will be the same as new issue process.
10 General roles

Nominated person must be ready for Exam and Interview before the date of exam.
If the ADDC person failed in 2nd exam, he will not be allowed to reappear for the next
three months in order to enable him to commence with field training, approval will be
subject to the committee.
New staffs who have qualified the HSE Exams will be monitored by a field expert for a
period of one month.
Certificate is subject to be withdrawn, if the person has not fully implemented the HSE
requirements / System Safety Rules.
If it is apparent after the Accident Investigation, that the cause of accident was due to
AP/CP/CN persons fault, HSEQ Manager will withdraw the Certificate from him and he
will not be reissued with other certificate for 3 months period and if required he MUST go
for the process as a new issue certificate.
All those who qualify will be issued with the applicable CARD, which must be used all the
time on site.
Approval of contractor staff will be after project / contract HSE Plan Approval.
Process Flowcharts and ADDC Staff Approval Process Flowchart are provided on the
following pages.
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Private Electrical Equipment Authorized Person Approval Process
Developer / Owner/ Consultant
Nominate person (s) for
Authorization
Defining clearly the scope of work
using the application form
supported with all required
documents.
Submit to Asset Directorate
Nominated Person Application
PASSED
NO
Rejection
YES
HSEQ Manager
Asset Directorate
Nominated person (s) meet the
qualification, experiences,
understand the limits of the work
and the limited boundaries of the
interface agreement? If Yes, sign
the form and submit to DMS for
operation Interview, if NO rejection
to be send to requester
Approve the nominated person
certificate for 1 YEAR
and instruct the staff to issue ID
CARD
HSE Approved Nominated Person
Accepted Nominated Person
HSEQ Dept. Secretary
Operation Dept. DMS
Interview the nominated Person
(meet the ADDC operation criteria /
Technically / Experiences are
capable to operate the equipment)
If YES pass the submission to
HSEQ if No Rejection to be send to
AMD
Issue ID CARD as per the
approved certificate
Issue CARD for the approved
person
Keep CARD copy + certificate in file
CARD/CERTIFICATE
Appointment for exam
HSEQ Dept. Secretary
Arrange an appointment for
Training, written exam and
interview for the nominated person
(s) and inform him (them)
Appointment for Training & exam
Sr. HSE Eng. / HSE Eng.
Train, Examine and interview the
nominated person (s) as per the
ADDC SSR & HSE procedure
END
Notes:
The nominated person should be qualified as
engineer as minimum
The nominated person shall have 3 years
operation experience as minimum
Nominated person must study ADDC System
Safety rules and other related HSE requirements
before exam and interview
Renewal of the certificate / CARD will be after
verifying the scope.
Certificate / CARD is subject to be withdrawn if
the person does not fully implement the HSE
requirements / System Safety Rules.
Result
Disclaimer:
Approved Person shall implement ADDC SSR on the workmanship provided.
ADDC shall NOT be subject to any legal obligation of the accident happened by the approved person
SYSTEM SAFETY RULES
IR.GN.01
APPENDIX 12
1.
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SUBSTATION BATTERIES
SCOPE
This Appendix provides guidance on safe working practices associated with inspection and
maintenance of storage batteries as used in electrical substations. It also provides guidance on the
requirements for the tools allowed to be used in battery rooms and the requirements for PPE.
2.
DEFINITIONS
For the purposes of this appendix the following definition applies
Cell – an individual electrolytic cell in a battery.
Single-ended Insulated Tool – A tool with only one end that can be used to perform work and the
rest of the tool covered with an approved electrical insulation material.
3.
All Equipment on which work is carried out must be readily identifiable. Where necessary, and
Approved means of temporary identification must be attached which will remain effective
throughout the duration of the work and removed on completion of the work.
4.
DANGERS
The main Dangers to personnel working on storage battery systems are explosions due to a high
concentration of Hydrogen, arcing resulting from short circuits and burns as a result of contact
with the electrolyte used on the batteries.
Before entering a battery room it must be verified that the extraction fan is working (if fitted) or
that the room is sufficiently ventilated to ensure that the build up of Hydrogen is unlikely.
5.
PPE
The recommended PPE to be worn when work is done in battery rooms is:
1.
Gas-tight goggles or face screens
2.
Boiler suit
3.
Aprons
4.
Gloves
5.
Gum boots
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IR.GN.01
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6. GENERAL REQUIREMENTS
Personnel working on battery installations should remove personal adornments made of metal on
their wrists, neck and hands before starting their work.
Only wooden ladders must be used in battery rooms.
6.1
6.1.1
INSPECTION AND TESTING OF BATTERIES
VISUAL INSPECTION
When visual inspection of battery systems needs to be done, the Authorized Person shall assess
the conditions and shall:

6.1.2
Specify the minimum PPE to be worn.
Issue a Limited Access Permit
Testing of the Electrolyte

The minimum recommended PPE must be worn.
At least two persons should be present when the tests are performed.
Additional ventilation directly above the cells must be applied (where the highest
concentrations of Hydrogen will be present) when the filling caps are removed.
A suitable supply of clean water must be available to dilute and wash away any spillage and
for the workers to wash if they come into contact with the electrolyte.
When topping up the cells fresh, good quality distilled water must be used.
6.1.3
Testing of the cells

The minimum recommended PPE must be worn.
At least two persons should be present when the tests are performed.
When using battery testing tools which connect a load across the battery cell in the course of
the measurement, sparking can result while removing the test spikes from the battery
terminals. This can result in explosions and additional ventilation must be applied directly
above the cells where the highest concentrations of Hydrogen will be present.
SYSTEM SAFETY RULES
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6.1.4
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Replacement of defective cells
If the battery can be disconnected from the load and the battery charger:
Points where the battery must be disconnected must be identified and the battery
disconnected.
The Authorized Person issue a PTW and state that no earths are applied as well as special
precautions to ensure Safety from the System.
Only single-ended insulated tools must be used for work on batteries.
REPLACEMENT OF DEFECTIVE CELLS WHILE THE BATTERY IS CONNECTED
TO THE LOAD AND/OR THE BATTERY CHARGERMUST BE AVOIDED. WHEN
UNAVOIDABLE, IT MUST BE DONE ACCORDING TO AN APPROVED
PROCEDURE.
SYSTEM SAFETY RULES
IR.GN.01
APPENDIX 13
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PERSONAL PROTECTIVE EQUIPMENT
This Appendix addresses the requirements for Personal Protective Equipment for employees of Abu
Dhabi Distribution Company (ADDC), visitors and contractors when entering work areas and when
doing work on Equipment.
Protective Equipment must be worn by all employees, visitors and contractors when entering
locations where Equipment is housed or when work is performed on Equipment.
The specific requirements for the protective equipment are described in an Approved Specification
document.
ADDC employees has been identified and categorized with the respective PPE requirements as
follows:
Category 1 – Management
• Foot protection - Safety Shoes
• Head protection – Hard Hat
• Eye protection – Sun Glasses
Category 2A – Engineers and Supervisors (Power) – (NFPA70E: Table 130.7(C)(8) Standards on
Protective Equipment)
• Body protection – Shirts and Trousers, Arc flash suit
• Hand protection – Electrical insulated gloves, Leather gloves
• Eye and Face protection – Arc flash face shield, Sun Glasses
Category 2B - Engineers and Supervisors (Water)
• Body protection – Shirts and Trousers
• Hand protection – General cotton gloves, Leather gloves
• Eye and Face protection – Goggle, Sun Glasses
Category 2C - Engineers and Supervisors (Projects & AMD)
• Body protection – Shirts and Trousers
• Eye and Face protection – Sun Glasses
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Category 3A – Workforce (Technician, Electrician, Mechanics, etc) – Power - (NFPA70E: Table
130.7(C)(8) Standards on Protective Equipment)
• Body protection – Coverall
• Hand protection – Electrical insulated gloves, Leather gloves
Category 3B – Workforce (Technician, Electrician, Mechanics, etc) – Water
• Hand protection – General cotton gloves, Leather gloves
Category 3C – Workforce (Technician, Electrician, Mechanics, etc) – Other
• Hand protection – General cotton gloves, Leather gloves for Operators and F/R gloves for
Welders.
• Eye and Face protection – Goggles and Face Shield (chemical) for Operators and Goggles,
Welding Face Shield for Welders
Category 4A – Laboratory - Chemist
• Protective clothing recommended in the OSHA standard 29 CFR 1910.132 include lab coats,
aprons and face shields
• Foot Protection (29 CFR 1910.136): Protective footwear (shoe covers) shall be worn to
prevent the spread of contamination of chemical hazards or biological pathogens. Special
footwear (non-conductive, chemical resistant and thermal) may be required based upon work
conditions.
• Head protection – Hard Hat (when required)
• Hand protection (29 CFR 1910.132): Appropriate hand protection shall be used in chemical
laboratory procedures involving hazardous substances (chemically resistant, latex and nitrile
gloves) and temperature extremes, corrosive, caustic or toxic materials (chemically resistant,
insulating and rubber gloves).
• Eye and Face protection – Goggles and Face Shield, Eyewash and Shower Stations (OSHA
29 CFR 1910.151/ANSI 2358.11990)
• Respiratory Protection (29 CFR 1910.134): Major Requirements depend on the materials
handled/exposed to. It is recommended to refer to OSHA standard 29 CFR 1910.134 for
respiratory protection selection (face masks, respiratory mask, SCBA, etc.)
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Category 4B – Laboratory - Samplers
• Body protection – Coverall (29 CFR 1910.132)
• Foot protection (29 CFR 1910.136): Protective footwear shall be worn to prevent the spread
of contamination of chemical hazards or biological pathogens (shoe covers). Special
footwear (non-conductive, chemical resistant and thermal) may be required based upon work
conditions. For sampling work in the environment, impermeable, steel-toed boots must be
worn.
• Head protection – Hard Hat (29 CFR 1910.135)
• Hand protection – (29 CFR 1910.132): Chemical Resistant gloves, Cotton gloves, latex and
nitrile gloves, insulating and rubber gloves.
• Eye and Face protection – Goggles and Face Shield and Eyewash solutions (OSHA 29 CFR
1910.151/ANSI 2358.11990)
• Hearing Protection (29 CFR 1910.25): Hearing protection devices (earplugs and ear muffs)
are required in any area where noise levels are equal to or greater than 90 dB for an 8 hour
time weighted average.
• Respiratory Protection (29 CFR 1910.134): Refer to OSHA standard 29 CFR 1910.134 for
respiratory protection selection (face masks, dust masks, full face respirators, SCBA, etc.)
• Caution Signs or barricade tape for any sampling taking place
• High Visibility Safety Vest
Category 5 – Meter Readers
• Body protection – Uniforms
• Head protection - Cap
• Foot protection – Safety shoes
Category 6 – Drivers
• Body protection – Uniforms
• Head protection – Hard hat
• Foot protection – Safety shoes
When work is performed at specific locations, additional PPE may be required as listed:
Batteries - As for Chemical laboratories
The recommended PPE to be worn when work is done in battery rooms is:
• gas-tight goggles or face screens
• boiler suit
• special aprons
• special gloves
• gum boots
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Overhead Lines (NFPA70E: Table 130.7(C)(8) Standards on Protective Equipment)
• Safety Harness
• Arc flash face shield/suit when working within the arc flash boundary
Cables (NFPA70E: Table 130.7(C)(8) Standards on Protective Equipment)
• F/R gloves when doing heat shrink joint.
• F/R coverall when doing heat shrink joint.
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APPENDIX 14
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LOCKOUT/TAGOUT PROCEDURE
PURPOSE
This procedure establishes the minimum requirements for the lockout and/or tagout of
Equipment or other energy sources. It shall be used to ensure that Equipment are isolated
from all potentially hazardous energy sources, and locked out and/or tagged out before
employees perform any work where the unexpected start-up or release of stored energy could
cause injury.
2
DEFINITIONS
Lockout/Tagout
•
Installation of lock(s) and tag(s) on the Equipment and Isolation Devices to ensure
that work can be performed safely. The lock(s) and tag(s) ensure that the Equipment
and Isolating Device(s) or system(s) they isolate and/or control, cannot be operated
until the lock(s) and tag(s) are removed.
Lockout Device.
•
A device that utilizes a positive means such as a lock to hold an energy isolating
device in a safe position and prevent the energizing of a machine or equipment.
Tagout Device.
•
3
A prominent warning device, such as a tag and a means of attachment, which can be
securely fastened to an energy isolating device in accordance with an established
procedure, to indicate that the energy isolating device and the equipment being
controlled may not be operated until the tagout device is removed.
PREPARATION FOR LOCKOUT
3.1 When work is to be carried out on or near to Equipment, an Authorised Person shall assess the
means of achieving Safety from the System. When the Authorised Person decides it is
necessary to confirm these instructions in writing, he shall issue a Safety Document.
•
The Equipment shall be identified and the Control Person shall prepare it for release from
Operational Service
•
The Authorised Person shall ensure that the Equipment is Isolated and that Points of
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•
For electrical Equipment the Authorised Person shall assess the situation, check for and
confirm no volts using an Approved voltage testing device and then discharge the
Equipment. The voltage indicator must be tested immediately before and after use.
•
For work on electrical Equipment, Primary Earths shall be applied within the zone
established by the Points of Isolation. Where reasonably practicable the Primary Earths
shall be Locked. Approved Caution notices (Safety Tag) shall be attached to the Point of
Isolation.
•
The contents of the Equipment shall be adjusted to a level which avoids all Danger. Where
drain valves are used they shall, where practicable, be Locked in the appropriate position
•
Where Danger could arise from pressurisation, the Equipment shall be Vented. The
emissions shall be dissipated so as to avoid Danger. Where reasonably practicable drain
vents shall be Locked open
3.2 The following procedures for the different Lockout Devices can be used to secure the Safety
Precautions:
3.2.1
Fixed Key Safe
A Key Safe that is permanently fixed in the substation.
•
The Authorised Person shall place the Safety Keys securing the safety precautions in a Key
Safe
•
The Key Safe shall be Locked by a Key Safe Key.
•
The Key Safe Key shall be removed and handed over to the competent person
•
The Authorised Person shall further secure the Key Safe by locking using the Control Key.
3.2.2
Portable Key Safe
A Key Safe that can be taken by the Authorised Person to the Points of Isolation.
Where the Points of Isolation is not close to a substation, and it is unpractical to drive long
distances to place the Safety Keys in a Fixed Key Safe, a Portable Key safe can be used. In
this case the Authorised Person will keep the Portable Key safe in safe custody for the
duration of the work.
•
The Authorised Person shall place the Safety Keys securing the safety precautions in a Key
Safe
•
The Key Safe shall be Locked by a Key Safe Key.
•
The Key Safe Key shall be removed and handed over to Competent Person
•
The Authorised Person shall further secure the Key Safe by locking using the Control Key
and keep the Key Safe in safe custody.
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Multi Clasp
•
When a Multi-clasp is used to secure selected single Points of Isolation, then a control
padlock will be attached by the Authorised Person
•
An additional Safety Lock will be attached by each Competent Person.
Examples of Examples of Lockout/Tagout Devices can be found in Addendum A.
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APPENDIX 15
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STANDBY GENERATORS PROCEDURE
PURPOSE
This document describes the procedures to be adopted for working on Standby Generator
Sets.
2
DEFINITIONS
Safety Notices being one of the following:Danger Notice
•
An Approved notice reading “Danger” which is attached to Equipment and structures
outside the boundary marking to warn of electrical or mechanical Dangers.
3
EQUIPMENT IDENTIFICATION
Equipment on which work is to be carried out must be readily identifiable. Where necessary
a means of identification must be fixed to it which will remain effective throughout the
course of the work.
4
DANGERS
The main Dangers to personnel arising from work on standby generator sets are:
1. Electrical shock when working on the electrical system of the generator and the drive motor
is inadvertently started.
2. Injuries due to the movement of rotating parts when the drive motor is inadvertently started
5
WORK ON OR NEAR STANDBY GENERATORS
When work is to be done near or on Standby Generators, the Authorised Person must assess
the work and decide if the work must proceed under a Permit to Work or a Limited Access
Permit to achieve Safety from the System.
5.1
If the work does not involve the requirement for Primary Earths, the Authorised Person
must assess the work and decide if the work can proceed by giving clear instructions, or
where Safety of the System cannot be achieved through instructions a Limited Access
Permit must be issued.
SYSTEM SAFETY RULES
IR.GN.01
5.2
Managing Director
If the work involves the application of Primary Earths, Points of Isolation must be
established and a Permit to Work must be issued for the work to proceed. The following
must be considered as Points of Isolation to achieve Safety from the System when working
on Standby Generators:
•
The electrical connections from the generator stator at the switchgear.
•
The electrical connections from the generator rotor (excitation) at the feed panel.
•
The electrical connection from the battery to the starter motor of the diesel engine.
5.3
5.4
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If work involves the testing of the generator, Points of Isolation must be established and a
Sanction for Test must be issued. The following must be considered:
•
No other Permits to Work or Sanctions for Test must be out on the generator set.
•
The Competent Person must ensure that all induced energy is drained after testing is
completed and before work can continue.
The work area must be barricaded to prevent unauthorised people entering the work area and
Safety Signs posted at the boundary of the demarcated area.
SYSTEM SAFETY RULES
IR.GN.01
APPENDIX 16
EQUIPMENT
1
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AUTOMATICALLY AND/OR REMOTELY CONTROLLED
HIGH VOLTAGE SWITCHING OF EQUIPMENT THAT CAN BE OPERATED
REMOTELY - OTHER THAN FOR EMERGENCY PURPOSES
Equipment fitted with the facility should whenever possible, be operated from the remote
location for Operational and Safety Switching.
Remote operation is only allowed on circuit breakers and isolators. Under no circumstances
will earthing devices be operated remotely.
1.1
Before HV Operational and Safety Switching instructions are issued by the appropriate
Control Person, they must be recorded giving the name of the Location(s) at which the
instructions are to be carried out, the circuit name and full identification of the Equipment
that will be switched remotely as well as full identification of the Equipment that will be
switched locally and the effect of the operations.
1.2
The Control Person must give HV Operational and Safety Switching instructions direct to
the Authorized Person who is going to carry out the local operation.
1.3
When Portable Primary Earths are to be applied or removed to achieve Safety from the
System, the instructions must be given directly to an Authorized Person.
1.4
When HV Operational and Safety Switching is to be carried out by a person under training, he
must be under the Supervision of an Authorized Person who has also received the
instructions direct from the Control Person.
1.5
The Control Person must give HV Operational and Safety Switching instructions to the
Authorized Person in two parts as detailed below:

An explanation of the overall objective of the subsequent operations including the identity
and Location of the Equipment involved. It is not necessary to record this part of the
instruction

The formal precise instructions should follow a standard pattern and include

The names of the Control Person giving the instruction and Authorized Person receiving
the instruction

The Location at which the Equipment operates
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the actual operational requirement, including the Equipment that will be switched from a
remote location

the time and date of the instruction
1.6
The Authorized Person recipient of the HV Operational and Safety Switching instructions
must write them down and repeat them back phrase by phrase as received. At the end of the
message the instructions must be read back in full to ensure that they have been accurately
received and understood. The instruction should be recorded in the Log Books at the
substation and Control Center before the instruction is carried out.
1.7
When carrying out HV Operational and Safety Switching instructions the recipient must
observe the following requirements

The Authorized Person must be deliberate, neither rushing nor causing undue delay and
must take nothing for granted

The Authorized Person must take with him the written instruction, consulting it and
checking that he is on the correct Equipment before taking any action

The Authorized Person must then pause and recheck his proposed action before proceeding

After carrying out each operation the Authorized Person must tick off that operation and
check by all means readily available that each step has been satisfactorily completed

After each remote operation of Equipment, the Authorized Person must observe the status
of the equipment and check by all means readily available that the Equipment has operated
satisfactorily.

After a circuit breaker or isolator has been opened remotely, for Safety Switching, the
Authorized Person must switch the Local/Remote selector switch to the Local position.

When a piece of Equipment shows any sign of distress, its condition must be reported
immediately to the appropriate Control Person before continuing with the instructions. All
persons must be warned that a potential hazard exists

Before an overhead line or cable circuit earth switch is closed, any Circuit identification
must be checked and added to the instruction by the Authorized Person.

Equipment that is normally Locked must only be unlocked immediately before being
operated and then relocked immediately after it has been operated
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the recipient must also endorse his instructions with the time of the completion of the
operation or sequence of operations.
1.8 Following HV Operational and Safety Switching the recipient of the instructions must comply
with the following requirements
1.9

record the time of completion of the operations, together with any Circuit Identification

report back to the appropriate Control Person the operations carried out, the time of
completion and any Circuit Identification involved.
The appropriate Control Person must record the completion of the HV Operational and Safety
Switching and any Circuit Identification. He must also give the sender confirmation of the
time of receipt which must be recorded together with the name of the Control Person. He
must also acknowledge, by repeating back to the sender, any relevant additional information
passed to him.
1.10 All recorded Operational and Safety Switching instructions must be written legibly and
indelibly. Records should be retained for a minimum period of one year.
SYSTEM SAFETY RULES
IR.GN.01
APPENDIX 17
PHASE)
1.
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ADD/REMOVE EQUIPMENT FROM THE SYSTEM (COMMISSION
SCOPE
ensure the safety of personnel of the Company involved in the commissioning and connection
of equipment to the System.
2.
DEFINITION
3.
All Equipment on which commissioning tests are to be witnessed/done by personnel of the
company must be readily identifiable. Where necessary an Approved means of temporary
identification must be attached, which will remain effective throughout the duration of the
work.
4.
DANGERS
The main Dangers to personnel involved in commissioning tests are electric shock and burns
when exposed to equipment energized during the commissioning tests.
5.
GENERAL CONDITIONS
During the construction and commissioning period the equipment is still under the control of
the contractors and the Company SSR can not be applied when tests are performed by the
contractor. Only when the Equipment is handed over to ADDC can the SSR be applied.
6.
COMMISSIONING TESTS BY CONTRACTOR
When the contractor performs commissioning tests by applying a source of supply and an
employee of ADDC is required to witness the tests to verify the correct operation of the
Equipment, the following will apply:
The test shall be done by an approved testing and commission engineer
The tests will be performed by the contractor according to an Approved Lockout Tagout
procedure.
The ADDC employee witnessing the tests must be a Competent Person.
The safety precautions implemented by the contractor must be equivalent to the required
safety precautions for the issuing of a SFT under the Company SSR.
The contractor must be in possession of a Safety Document equivalent to a SFT under the
Company SSR. The Safety Document must be issued by the Contract Engineer.
The Competent Person can only witness the correctness of the test and the test results and
cannot operate the test equipment.
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If the Competent Person is not satisfied with the Safety Precautions implemented by the
contractor, the following procedure must be followed:
He must immediately stop the work and withdraw all employees of the Company that may
be in danger if the tests are continued.
He must inform the ADDC Project Engineer/HSEQ Dept. of the unsafe conditions.
The ADDC Project Engineer/HSEQ Dept. must resolve the matter with the Contract
Engineer so that the tests can continue.
COMMISSIONING TESTS BY COMPETENT PERSON (ADDC)
If it is necessary for a Competent Person from ADDC to perform commissioning tests on
existing equipment before the Equipment has been officially handed over for Operation, the
following procedure must be followed:
In case of contractor did the work, The contractor agrees that the tests can be performed by a
Competent Person from ADDC. A contractor staff member must be a member of the
Working Party to witness the tests.
The Commissioning Engineer/Authorized Person and the Competent Person inspect the
Equipment and satisfies themselves that the tests can be performed safely.
The Authorized Person implements the Safety Precautions on the Equipment to ensure the
safety of the Working Party.
The Authorized Person issues a SFT to the Competent Person and endorses the Safety
Document with the following statement: “Equipment under Commissioning”.
On completion of the tests, the Competent Person clears the Safety Document.
The Authorized Person cancels the Safety Document
8.
8.1
HANDOVER OF EQUIPMENT TO ADDC AND ISSUING OF A CLEARANCE
CERTIFICATE
When the contractor completed the work and commissioning tests on the Equipment and it
needs to be handed over to ADDC, the following will apply.

8.2
All Equipment to be handed over to ADDC must be readily identifiable. Where
necessary an Approved means of temporary identification must be attached, which will
remain effective until a means of permanent identification is implemented.
The contractor informs ADDC that the Equipment has been commissioned and is ready
for handover.
Energization clearance Certificate shall be signed by all concerned parties and planning
for energization
If the Commissioning Engineer is not satisfied that all commissioning tests has been
performed, and require ADDC staff to perform additional tests on Equipment, the procedure
as described in paragraph 7 (above) must be followed.
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If the Commissioning Engineer is satisfied that all commissioning tests have been performed
and that the Equipment is ready to be taken over by ADDC and energization clearance
certificate has been approved and equipment has been energized then a Clearance Certificate
or announcement shall be issued to all concerned parties for the Equipment must be
completed.
SYSTEM SAFETY RULES
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APPENDIX 18
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PUBLIC WORK NEAR OHL
PUBLIC SAFETY NEAR OVERHEAD LINES
This Appendix outlines the principles for ensuring the safety of the public when approaching
and/or working near overhead lines. The Appendix is complementary to the Company System
Safety Rules and provides general guidance towards the requirements to make the general
public aware of the dangers and safe distances associated with overhead lines.
2
DEFINITIONS
Overhead Line Towers
• The structures that support the electrical equipment and conductors at a certain height above
ground level.
Terms printed in bold type are as described in the Company System Safety Rules.
3 Access to Overhead Line Towers
3.1 Where an overhead line can be accessed by the general public and where it is likely that work
can take place near the overhead line, warning notices must be attached to the overhead line
towers to inform the public of the following:
• The Safety Clearance and a statement that any approach by the public within this distance is
prohibited.
• Erection of any type of construction or other building under the line is prohibited.
3.2 Where an overhead line is accessible and a road crosses underneath the line, warning notices
must be placed next to the road so that it is clearly visible when approaching the overhead line
while driving on the road and must inform the public of the following:
• The voltage at which the overhead line operates.
• The maximum safe height from ground level of any vehicle or structure to pass underneath
the line.
4
GROUND CLEARANCE
4.1 Guidelines for the vertical distance to ground of overhead conductors at voltages 750 V to 22 kV
are given in IEEE C2-2002 Table 232-1 page 74.
4.2 According to rule 232 C.1.a (page 73) the vertical distance to ground for overhead conductors at
a voltage higher than 22 kV is increased by 10mm/kV in excess of 22 kV.
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4.3 The following table shows the vertical distances from the conductor to ground for overhead
conductors according to IEEE C2-2002 and the Maximum Safe Height from ground for vehicles
crossing underneath the line:
Nature of surface
underneath wires,
conductors, or cables
Open Conductors:
750 V to 22 kV
Open Conductors:
33 kV
Roads, streets, and other
areas subject to truck
traffic
5.6 meter
5.71 meter
Maximum Safe Height
from Ground
3.77
3.88
The Maximum Safe Height is calculated by subtracting the Safety Clearance from the Minimum
Ground Clearance of the conductor.
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APPENDIX 19
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LABORATORY SAFETY RULES
General

The location of eyewash fountains and emergency showers must be known by all laboratory
staff and entrants.

Before beginning a procedure, one must list all hazards involved in order to take all necessary
safety precautions.

Eating, drinking, and smoking must not be permitted in laboratory areas. Break rooms should
be available for that use.

Food products must be stored in separate non-lab refrigerators specifically reserved for that
use.

Unsafe equipment (i.e. defective, uncelebrated) must be identified, removed from service and
reported to Laboratory Manager.

Because unattended equipment and reactions are major causes of fire, floods, and explosions,
utility connections (gas, electricity, water) must be regularly checked by a qualified
engineer/plumber.

Properly label all containers.

Wear approved eye and face protection suitable for the work at hand. Safety glasses or
goggles should be worn at all times while working with chemicals at the counter or laboratory
hood. A face shield should be worn when working with potentially eruptive substances.

Ensure that all visitors and non-lab staff to observe Safety Rules for Visitors.

Wear protective gloves and clothing whenever handling corrosive, toxic, or other hazardous
chemicals. Wear closed-toe shoes at all times in the lab.

Check that guards are provided on moving parts of mechanical apparatus to prevent hazardous
contact.

Maintain lab areas reasonably neat and uncluttered.

Use the fume hood for all operations involving harmful gases or fumes and for flammable or
explosive materials. Check the hood to see that it is operating adequately and has been
inspected within the last year.
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Use a safety shield or barrier to protect against explosion, implosion, and flash fires when
performing reactions with large volume of flammable liquids or unstable material.

Inspect glassware for cracks, sharp edges, and contamination before using. Broken or chipped
glassware should be repaired and polished or discarded.

Always use a lubricant when inserting glass tubing into rubber stoppers or grommets.

Broken glass should be put in impervious containers that are large enough to completely
contain the glass. These containers are to be placed into the building trash dumpsters by
laboratory personnel.

Do not handle radioactive isotopes without oversight from the laboratory manager/supervisor.

Hazardous waste must be handled and disposed as per the company procedure.
2-
Chemical Handling

Transport dangerous or flammable liquids in a safety pail or other adequate secondary
containment. Prevent containers from tipping when transporting on a cart.

Take extra precautions when working with large quantities of reactants.

Use caution when adding anything to a strong acid, caustic, or oxidant.

When adding solids (boiling chips, charcoal, etc.) to a liquid, check that it isn't hot.

Keep the mouth of any vessel being heated pointed away from any person.

When working with biohazardous material, guard against infection by skin contact, inhalation
of aerosols, and contamination of food and beverages.

Known carcinogens, mutagens, and teratogens should not be used or stored in normal
laboratory situations. Such substances require extreme precaution, tight security, limited
access, secondary containers.

Flammable liquids should only be heated with steam, hot water or a grounded heating mantle.
Check the area for possible flames or electrical sparks.

When not in use, laboratory natural gas lines should be shut off at the line valve rather than at
the equipment.

Whenever possible, position energized electrical equipment, or other devices that may emit
sparks or flame, at least six inches above the floor.
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Properly ground electrical equipment.

Laboratory electrical equipment should have a three-conductor cord that connects to a
grounded electrical outlet, unless the equipment is dual-insulated.

Store strong oxidants (e.g., nitrates, chlorates, perchlorates, peroxides) in a dry area apart from
organic materials.

Use a specially designed wash-down laboratory hood for heated perchloric acid digestions.

Chemical Storage
All containers of hazardous chemicals must have a label attached. Labels on manufactured
3-
hazardous chemicals must include: a. The common name of the chemical; b. The name,
address and emergency phone number of the manufacturer; and c. An appropriate hazard
warning. The warning may be a single word "danger", "warning" and "caution" - or may
identify the primary hazard, both physical (i.e., water-reactive, flammable or explosive) and
health (i.e., carcinogen, corrosive, or irritant) hazard.

The laboratory supervisor is responsible for obtaining the MSDSs for the chemicals used in
his/her laboratory.

Whenever possible, store flammable solvents in NFPA-approved flammable liquid storage
cabinets or approved solvent storage rooms.

If storing more than 10 gallons of flammable liquids in a laboratory, a flammable liquid
cabinet MUST be used.

Pay careful attention to peroxide-forming compounds. Organic peroxides may detonate by
shock, friction, or heat. Compounds with dangerous tendencies to form peroxides by reaction
with oxygen have a limited shelf life. They should be dated on opening, and should in no case
be stored for longer than one year.

Keep caustics stored below eye level.

The major classes of corrosive chemicals are strong acids and bases, dehydrating agents, and
oxidizing agents. These chemicals can erode the skin and the respiratory epithelium and are
particularly damaging to the eyes. Store corrosives in cabinets, under the hood or on low
shelves, preferably in impervious trays to separate them physically from other groups of
chemicals. Keep containers that are not in use in storage areas and off bench tops.
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Keep glass containers of chemicals off the floor - unless they are inside protective containers
or pans that are kick-proof.
4
Pressure and Vacuum Systems
Plan and provide for the possibility of explosion prior to conducting experiments that develop
high pressure or vacuum.

Heat reactants only in a system with an approved pressure release.

Wait for pressure to be released before opening a pressurized vessel (autoclave, etc.).

Secure compressed gas cylinders in an upright position at all times to prevent from falling.
Keep protective caps in place when moving or storing gas cylinders.

Keep flammable gas cylinders away from exits and oxygen cylinders.

When moving cylinders with a lift truck or hand truck, make sure there is an approved rack or
securing device.

Never use oxygen as a substitute for compressed air. Do not use oil on gauges or regulators for
oxidizing gases. Oxygen under pressure reacts violently with oil or grease.

Never use compressed gas from a cylinder without a reduction of pressure through a suitable
pressure regulator.

Pressure adjusting screws on regulators shall always be FULLY RELEASED BEFORE the
regulator is attached to a cylinder. Always open the valves on cylinders slowly. Do not stand
in front of pressure regulator gauge faces when opening cylinder valves.

Do not strike valves with tools, or use excessive force in making connections.

Avoid mixtures of acetylene and oxygen or air prior to use except at a standard torch.

Cylinders not provided with fixed hand wheel valves shall have keys or handles provided on
valve stems at all times when cylinders are in use.

Cylinders should not be dropped, bumped violently, skidded or rolled horizontally.
Compressed gas cylinders are high-pressure vessels and should be handled accordingly.

Do not store cylinders in direct sun, or in boiler or furnace rooms.
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Container Handling
Properly label all containers.

Chemical transport containers are not to be used for non-compatible chemicals or for food
products at any time.

All containers should have a lid at all times except during an active experiment.

Refrigeration of flammable materials must be done in spark-proof or explosion-proof
refrigerators.
6
Chemical Spills and Waste Disposal
Devise a plan to deal with small spills before one occurs. POST the plan in the lab and get
appropriate equipment. Quickly and thoroughly clean up any liquid or solid chemical spill in
the laboratory or area of operations.

Dispose of chemical wastes by approved methods only. Unwanted or no-longer-useful
chemicals are chemical wastes. Contact EH & S Department for waste disposal guidelines.

Reagent bottles should be thoroughly cleaned of any hazardous material prior to disposal.
Clean glass reagent bottles can usually be recycled.

Label all waste containers with "Hazardous waste" plus a chemical description, BEFORE
adding waste.

Keep all waste containers closed except when adding waste and keep the waste in the room
where it was generated.
SYSTEM SAFETY RULES
IR.GN.01
Effective Date :
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Microbiology Laboratory Safety Rules
Each Employee working in a microbiology laboratory must follow the rules and Safety procedures
listed below.
General Safety Rules

No food or drinks are permitted in the laboratory at any time.
Only closed-toe shoes are to be worn in the laboratory. Sandals are not permitted.
Keep hands and other objects away from your face, nose, eyes, ears, and mouth. The
Application of cosmetics in the laboratory is prohibited in the laboratory
Work areas/surfaces must be disinfected before and after use.
Laboratory coats must be worn and buttoned while in the laboratory. Laboratory coats
should not be worn outside the laboratory.
Protective eyewear must be worn when performing any exercise or procedure in the
laboratory.
Long hair should be secured behind your head.
Hands must be washed before leaving the laboratory.
All unnecessary books, purses, briefcases, etc., must be kept off the countertops.
Never pipette anything by mouth (including water). Always use pipetting devices.
Label all materials with your name, date, and any other applicable information (e.g., media,
organism, etc.).
Dispose of wastes in their proper containers (see Biohazard Waste Disposal below).
When handling chemicals note the hazard code on the bottle and take the appropriate
precautions indicated.
Do not pour chemicals down the sink.
Return all chemicals, reagents, cultures, and glassware to their appropriate places.
Do not pour biohazard fluids down the sink.
Glassware should be washed with soap and water, and then rinsed with distilled water.
Flame transfer loops, wires, or needles before and immediately after use to transfer
biological material.
Do not walk about the laboratory with transfer loops, wires, needles, or pipettes containing
infectious material.
Be careful around Bunsen burners. Flames cannot always been seen.
Turn off incinerators before leaving the laboratory.
Report any broken equipment.
Immediately, report any broken glass, especially those containing infectious materials.
If you are injured in the laboratory, immediately contact the HSE officer.
Any chemical or biological fluid spills must be immediately reported to the HSE officer.
Follow all instructors given by your Supervisor & HSE Officer for cleaning up any spills or
broken glass.
SYSTEM SAFETY RULES
IR.GN.01

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Familiarize yourself with safety equipment in the laboratory and emergency escape routes.
Always wipe and clean the lenses of your microscope before putting it away. Use the
appropriate tissue paper and cleaning solution for this purpose.
Use appropriate universal precautions with all biological fluids.
Do not remove any materials from the laboratory without the written permission from
your supervisor.
Biohazard Waste Disposal
Dispose of items in the special receptacles as indicated below. If you have a question regarding the
proper disposal of an item, please ask your Supervisor and HSE Officer
(if any).
Material
Agar slants
material
with
biological
Biological liquids (not in test
tubes)
Biological liquids in test tubes
Broken glass (contaminated)
Broken glass (not contaminated)
Cotton Swabs (contaminated)
Needles, glass slides, syringes,
pipettes, Other types of sharps
Petri dishes and contaminated
solids (other than pipettes or swabs
container
Transfer pipettes (contaminated)
Non contaminated paper
Method of Disposal
Place tube upright in indicated test tube rack
but place caps in basket as indicated and
sterilize them
Leave in container with closed cap
Follow specific instructions given by
Supervisor to handle and dispose it.
Place tube upright in indicated test tube rack
with caps left on the tube and sterilize
before disposal.
Broken glass container
Broken glass container
Bench top disinfectant/discard can
Sharps container
Biohazard “orange/red or white bag”
Bench top disinfectant/discard can
Regular trash
In general, non contaminated items that pose no threat as a sharp object capable of causing injury
can be disposed by placing them in the regular trash. All sharps contaminated or not, should be
discarded into the sharps container. All other contaminated materials should sterilized first and
discard them as ADWEA HSE Regulations.
SYSTEM SAFETY RULES
IR.GN.01
APPENDIX 20
LADDERS
1
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MOBILE ELEVATED WORK PLATFORMS (MEWP) AND
SCOPE
This appendix describes the procedures to be adopted for the use of Mobile Elevated Work
Platforms (MEWP) and ladders.
2
DEFINITIONS
3
EQUIPMENT IDENTIFICATION
Equipment on which work is to be carried out must be readily identifiable. Where necessary a
means of identification must be fixed to it which will remain effective throughout the course of
the work.
4
DANGERS
The main Dangers to personnel arising from the use of Mobile Elevated Work Platforms and
ladders are:
•
Fall from heights when adequate means are not taken to prevent falls.
•
Fall from heights when the MEWP and/or ladder is not secure and fall over.
•
Electrocution when work is performed near or on overhead lines.
•
Injuries when the MEWP is struck by a vehicle while parked on a road to do work on street
lights.
5
RISK ASSESSMENT
5.1 The Authorised Person must carry out a specific on site risk assessment to determine the most
appropriate measures to be taken to ensure Safety from the System before a MEWP is used.
5.2 Contractors are responsible for preparing their own risk assessments when using a MEWP. This
may be carried out using their own forms and must achieve an equivalent standard to SSR.
The following guidelines should be taken into account when using Mobile Elevated Work
Platforms:
•
Only trained, Authorised Operators must be allowed to operate a MEWP.
SYSTEM SAFETY RULES
IR.GN.01
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•
The MEWP is a working platform and should not be used as a crane by suspending loads
beneath using slings or any other type of lifting accessory.
•
Never exceed the Safe Working Load (SWL) which is marked on the machine.
•
Safety harnesses/lanyard combinations must only be attached to the anchorage provided by
the manufacturer. Lanyards must never be attached to any other object or a structure outside
the platform.
•
Never interfere with, wedge or override hydraulic, electrical or mechanical safety devices or
controls.
•
Travelling with the platform of a MEWP occupied and raised should not be allowed.
•
When the MEWP is fitted with outriggers, the working platform must only be used when the
outriggers is fully extended and chocked.
•
The MEWP must only be used on firm soil to ensure that it remains stable with the working
platform raised. If the soil is not firm, suitable outrigger pads must be used to ensure the
stability of the MEWP.
6
WORK NEAR HIGH VOLTAGE OVERHEAD LINES
Working near High Voltage Overhead Lines should be avoided but if it cannot be avoided, the
following precautions should be taken:
•
Always maintain a safe distance from the overhead line. The minimum distance, measured
from the furthest point of outreach to the ground level barrier or point directly beneath the
outmost conductor, must be at least 8 meter.
•
A minimum safe distance must always be kept between the overhead lines and the closest
point of the MEWP when fully extended. This distance is 15 meter with overhead lines
mounted on steel towers and 9 meters with lines mounted on poles of wood, concrete or steel.
Theses distances are measured horizontally at ground level from a position vertically below
the outmost conductor at the tower pole position.
If it is required to work inside these limits, the Authorised Person must assess the work to be done,
issue a Limited Access Permit and work can then proceed according to an Approved procedure.
•
On construction sites where the MEWP have to pass under the overhead lines, ground level
barriers must be positioned and ‘goal posts’ or other means of barriers erected at the place
where the machine may pass under the line.
•
If there is no need for the machine to pass under the overhead line, both ground level barriers
and high level markers must be placed to keep the machine at a safe distance.
See Demarcation and Approach - Addendum for Examples
SYSTEM SAFETY RULES
IR.GN.01
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WORKING ON PUBLIC ROADS (STREET LIGHT WORK)
When working on public roads, the following precautions must be followed:
•
Ensure that the operating area is fully cordoned off (demarcated) using cones, warning
notices, flashing yellow beacons or other Approved Equipment.
•
Under no circumstances must any part of the MEWP extend or swing into the line of traffic.
•
If it is required to divert the traffic, it must be undertaken by a trained person.
•
When work are to be carried out during hours of darkness at a location where public have
access, barriers must be in place with yellow flashing beacons.
8
WORKING AT HEIGHTS WITH LADDERS
8.1
When working on ladders the Authorised Person must assess the work to ensure General
Safety at the work area. The following precautions must be followed:
8.2
•
The bottom end of the ladder must be secured to prevent it from slipping. The
Authorised Person must evaluate what type of anti-slipping measures must be used.
•
Persons climbing the ladder must obey the three out of four rule. At least two hands
and one foot or one hand and two feet must be in contact with the ladder when
climbing.
•
The top end of the ladder must be securely fastened to the structure.
•
The ratio of vertical height to horizontal distance from vertical of the bottom of the
ladder must be at least four to one (4:1)
•
Only one person is allowed to climb on a ladder at the same time.
When working on ladders in electrical substations or near overhead lines the following must
apply;
•
Only wooden ladders or ladders manufactured from reinforced fibreglass must be used.
•
Ladders must always be carried in a horizontal position to prevent contact with the overhead
conductors.
•
Workers must not be allowed to work within the prescribed Safety Clearance as applicable to
the operating voltage of the equipment.
•
When it is required from workers to work within the Safety Clearance distance, the
Authorised Person must assess the work and if necessary, the work must be done following
an Approved procedure.
SYSTEM SAFETY RULES
IR.GN.01
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ADDENDUMS
Addendum A - Operational Switching Instructions
Addendum B – Safety Switching Instructions
Addendum C - Abbreviations and Phrases for use in all Switching Log Books
SYSTEM SAFETY RULES
IR.GN.01
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Addendum A
OPERATIONAL SWITCHING INSTRUCTIONS
To ensure all High Voltage Operational Switching instructions are clear and unambiguous, a
standard terminology should be adopted. However, some limited transposition of words is
permitted to achieve clear phraseology.
(+++)
Name of Substation
(¬¬¬)
Name of Circuit
(-----)
Indicates the inclusion of the appropriate terms
*
Delete as appropriate
**
Delete “to Charge/Discharge” when using an isolator
The recommended terms are as follows:INSTRUCTION 1 AT (+++) SUBSTATION ON (¬¬¬) CIRCUIT
CHECK SYNCH. ON CIRCUIT BREAKER (-----)
ACTION
Check all synchronising conditions and report to Control Person.
____________________________________________________________________
INSTRUCTION 2 AT (+++) SUBSTATION ON (¬¬¬) CIRCUIT CHECK SYNCH. AND
CLOSE CIRCUIT BREAKER (-----)
ACTION
Close circuit breaker using synchronising facilities and report action with load
on circuit and current on each phase if possible.
_________________________________________________________________
INSTRUCTION 3 AT (+++) SUBSTATION ON (¬¬¬) CIRCUIT
CLOSE CIRCUIT BREAKER/ISOLATOR*(-----) TO CHARGE
Action
Close circuit breaker/isolator, using synchronising override if necessary and
report back actions, with charging current on each phase if appropriate.
__________________________________________________________________
CHECK LOAD ON (-----)
SYSTEM SAFETY RULES
IR.GN.01
Action
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Check MW, MVAr and AMPS on each phase, if possible, and report back
readings.
CHECK NO LOAD AND OPEN CIRCUIT BREAKER/ISOLATOR*
(-----) TO DISCHARGE**
Action
The operator may have been informed in the opening discussion that some
charging current but no MW’s should be indicated. If conditions are as
expected, the circuit breaker is opened and the action reported back.
____________________________________________________________________
OPEN CIRCUIT BREAKER/ISOLATOR* (-----) TO DISCHARGE**
Action
Open circuit breaker or isolator.
____________________________________________________________________
ON TRANSFORMER (-----) TAP FROM POSITION (-----) TO (---)
Action
Operate tap changer control to move tap position as instructed.
__________________________________________________________________
SYSTEM SAFETY RULES
IR.GN.01
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Addendum B
SAFETY SWITCHING INSTRUCTIONS
To ensure all High Voltage Safety Switching instructions are clear and unambiguous, a standard
terminology should be adopted. Some limited transposition of words is permitted to achieve clear
phraseology. The actions to be taken to establish or remove safety precautions shall be in
accordance with Approved procedures.
(+++)
Name of Substation
(¬¬¬)
Name of Circuit
(-----) Indicates the inclusion of the appropriate terms.
*
Delete as appropriate
The recommended terms are as follows:11
FIXED ISOLATING DEVICES
INSTRUCTION
AT (+++) SUBSTATION ON (¬¬¬) CIRCUIT
OPEN (OR CHECK OPEN), AND RENDER INOPERATIVE ISOLATOR (-----)
ENTRY ON SAFETY DOCUMENT (-----)
RENDER OPERATIVE ISOLATOR (-----)
____________________________________________________________________
12
VOLTAGE TRANSFORMERS (excluding Metal Clad)
INSTRUCTION
INSTRUCTION
ISOLATE AND CAUTION (-----) VT SECONDARY SUPPLIES
ENTRY ON SAFETY DOCUMENT
INSTRUCTION
(-----) TV Secondary Supplies
AT (+++) SUBSTATION ON (¬¬¬) CIRCUIT RESTORE (-----) VT
SECONDARY SUPPLIES
13
EARTHING AND / OR AUXILIARY TRANSFORMERS
(Transformers providing supplies at LV)
SYSTEM SAFETY RULES
IR.GN.01
INSTRUCTION
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ISOLATE AND CAUTION (-----) EARTHING AND/OR AUXILIARY*
TRANSFORMER SECONDARY SUPPLIES
ENTRY ON SAFETY DOCUMENT (-----) Earthing and/or Auxiliary*
Transformer Secondary Supplies
INSTRUCTION
RESTORE (-----) EARTHING AND/OR AUXILIARY* TRANSFORMER
SECONDARY SUPPLIES
____________________________________________________________________
4
METAL CLAD SWITCHGEAR
INSTRUCTION
ISOLATE
(-----)
LOCK
AND
BUSBAR/FEEDER/CABLE/TRANSFORMER/VT/ETC*
SHUTTERS/ISOLATORS ETC*
CAUTION
ENTRY ON SAFETY DOCUMENT (-----) Isolated and Busbar/Feeder/Cable/
Transformer/VT/etc* Shutters/Isolators
INSTRUCTION
RESTORE (-----) TO SERVICE POSITION ON MAIN
BUSBAR/FRONT BUSBAR ETC*
___________________________________________________________________
5 EARTHING VIA METAL CLAD SWITCHGEAR
INSTRUCTION
SELECT
CIRCUIT
BREAKER
(-----)
TO
BUSBAR/FEEDER/CABLE/TRANSFORMER ETC* EARTH POSITION
AND CLOSE TO EARTH
ENTRY ON SAFETY DOCUMENT (-----)
in Busbar/Feeder/Cable/Transformer etc* Earth Position
INSTRUCTION AT (+++) SUBSTATION ON (¬¬¬) CIRCUIT
OPEN
AND
REMOVE
(-----)
FROM
THE
BUSBAR/FEEDER/CABLE/TRANSFORMER ETC* EARTH POSITION
____________________________________________________________________
SYSTEM SAFETY RULES
IR.GN.01
Effective Date :
Issue: 2
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Managing Director
6 EARTHING VIA PORTABLE EARTHING DEVICES
INSTRUCTION
AT (+++) SUBSTATION ON (¬¬¬) CIRCUIT APPLY EARTHS AT
(DESCRIPTION OF POSITION)
ENTRY ON SAFETY DOCUMENT (Description of Position)
INSTRUCTION
REMOVE EARTHS FROM (DESCRIPTION OF POSITION)
__________________________________________________________________
SYSTEM SAFETY RULES
IR.GN.01
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Addendum C
ABBREVIATIONS AND PHRASES FOR USE IN SWITCHING LOG BOOK
ALTERNATING CURRENT ………………………………………………...
AC
AUXILIARY TRANSFORMER ……………………………………………..
AUX Tr
BUSBAR …………………………………………………………………….
BB
CAPACITOR VOLTAGE TRANSFORMER ………………………………... CVT
CARBON DIOXIDE ………………………………………………………...
CO2
CIRCUIT…………………………………………….………………………… CCT
CIRCUIT BREAKER ………………………………………………………… CB
CURRENT TRANSFORMER ……………………………………………....... CT
AUTO RECLOSE ………………………………………………………….
AR
DIRECT CURRENT ……………………………………………………….
DC
EARTH FAULT PROTECTION ……………………………………………
E/F
EARTHING SWITCH ……………………………………………………….
E SW
EARTHING TRANSFORMER ……………………………………………..... ETr
FIXED MAINTENANCE EARTH …………………………………………… FME
GAS CIRCUIT BREAKER …………………………………………………… GCB
HIGH VOLTAGE ……………………………………………………………… HV
ISOLATOR …………………………………………………………………....... ISOL
KILO VOLT …………………………………………………………………
.kV
LOW VOLTAGE ……………………………………………………………
.LV
MINI CIRCUIT BREAKER …………………………………………………
MCB
NEUTRAL EARTHING RESISTOR
NER
NUMBER……………………………………………………………………
No.
OIL CIRCUIT BREAKER …………………………………………………
OCB
OVERCURRENT PROTECTION ……………………………………………
O/C
OVERHEAD LINE …………………………………………………………… OHL
PORTABLE MAINTENANCE EARTHING DEVICE ……………………… PMED
PORTABLE PRIMARY EARTH ………………………………………….
PPE
POUNDS PER SQUARE INCH ……………………………………………
PSI
SEALING END ………………………………………………………………
SE
STANDBY EARTH FAULT ………………………………………………..
SBEF
STATION TRANSFORMER ………………………………………………… STN T
SUBSTATION ………………………………………………………………… S/S
SULPHUR HEXAFLUORIDE …………………………………………….....
SF6
SUPER GRID TRANSFORMER ……………………………………………
SGTr
SWITCHING ISOLATOR ………………………………………………
SW ISOL
SYNCHRONOUS COMPENSATOR ……………………………………..
SYNCH COMP
TRANSFORMER …………………………………………………………..
TR
VOLTAGE TRANSFORMER ………………………………………………
VT
SYSTEM SAFETY RULES
IR.GN.01
CIRCUIT COLOURS BLACK ……………………………...
BLUE ………………………………..
GREEN ……………………………..
RED …………………………………
WHITE ………………………………
YELLOW …………………………..
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Managing Director
BK
B
G
R
W
Y
SYSTEM SAFETY RULES
IR.GN.01
Effective Date :
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Managing Director
Forms List
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Authorization Certificate “Authorized Person”
Authorization Certificate “ Control Person”
Competent Certificate “Competent Person”
Competent Certificate (Contractor)
Authorized Certificate (Contractor)
HSE Staff Certificate (Contractor)
Permit To Work (HV)
Permit to Work (LV)
Permit to Work “Mechanical”
Limited Access Permit
Sanction for Test
Transfer Of Safety Document
Record Of Inter-System Safety Precautions (RISSP) form
Hot work Permit
Confined Space Permit
Excavation Permit
Clearance Certificate
De-Clearance Certificate
SYSTEM SAFETY RULES
IR.GN.01
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DEMARCATION AND APPROACH TO HIGH VOLTAGE EQUIPMENT – ADDENDUM
A
SYSTEM SAFETY RULES
IR.GN.01
Effective Date :
Issue: 2
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Page 144 of 144
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Managing Director
Authorized Person
Abu Dhabi Distribution Company certifies that Mr. XXXXXXXXXX the
XXXXXXXXXX at the XXXXXXXXXX, is an Authorized Person as defined in
the company System Safety Rules to undertake the classes of work detailed
below.
HSEQ Department Manager
Categories of Appointment: xxxxxxx
Operation Authority:-
CLASSES OF WORK
1-
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
2-
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
First Issue
Expiry Date
Certificate Sr. No.
File No.
:
:
:
:
00.00.0000
00.00.0000
00.00.0000
xxxxx
Signature of holder: -----------------------
AP certificate Rev.02/2008
Date: ------------------
FM.HSQ.025
Control Person
Abu Dhabi Distribution Company certifies that Mr. XXXXXXXXXXX the
XXXXXXXXX at the XXXXXXXXXXXXXXXXXX, is a Control Person as
defined in the company System Safety Rules to undertake the classes of work
detailed below.
Categories of Appointment: XXXX
CLASSES OF WORK
1-
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
2-
3-
First Issue
Renewal Date
Expiry Date
Certificate Sr. No.
File No.
:
:
:
:
:
00.00.0000
00.00.0000
00.00.0000
XXX
XXXXX
Signature of holder: ----------------------CN Certificate Rev 02/2008
Date: -----------------FM.HSQ.027
Competent Person
Abu Dhabi Distribution Company certifies that Mr. XXXXXXXX as the
XXXXXXX at the XXXXXXXXXXXXXXXXXXX is a Competent Person as
defined in the company System Safety Rules to undertake the classes of work
detailed below.
Categories of Appointment: XXXXXX
CLASSES OF WORK
1- XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
First Issue
Renewal Date
Expiry Date
Certificate Sr. No.
File No.
: 00.00.0000
: 00.00.0000
: 00.00.0000
: XXX
: XXXXX
Signature of holder: -----------------------
CP Certificate Rev. 02/2008
Date: ------------------
FM.HSQ.026
Abu Dhabi Distribution Company
Ref.:
ِADDC/HSEQ/S/CCC000/00
Date:
00.00.0000
Competency Certificate
TO
: M/s xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
HSEQ Dept. in ADDC has approved:
Mr. xxxxxxxxxxxxx
xxxxxxxxxxxxxxxx
Nominated by your company as a Competent Person capable to protect HSE issues,
receive and clear Safety Documents within the ADDC's premises for the following works
:HV Work Scope of work
LV Work Mechanical Civil LAP Only On behalf of your company, the holder of this certificate shall strictly comply with
ADDC System Safety Rules, HSE procedures & guide lines.
Eng. HANI HOSSNI
HSEQ Dept. Manager
Signature of holder : ---------------Date : ----------------
First Issue :
Renewal Date:
Expiry Date:
00.00.0000
00.00.0000
00.00.0000
Cc:

HSE
xxxxxx
Disclaimer:
Contractor's Competent Person should ensure correct implementation of
ADDC SSR on the workmanship provided. Contractor will bear the consequences of
any violation to the approved procedure, and these violations should be reported to
ADDC HSEQ Dept. immediately, Competent person NOT allowed to open more than
one safety document at time
Contractor’s Staff CP Certificate 00/2008
FM.HSQ.015
Ref.:
ِADDC/HSEQ/S/CAC000/00
Date:
00.00.0000
Authorization Certificate
TO
: M/s xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
HSEQ Dept. in ADDC has approved:
Mr. xxxxxxxxxxxxx
xxxxxxxxxxxxxxxx
Nominated by your company as a Authorized Person capable to operate the below
mentioned equipment (s) in comply with ADDC System Safety Rules :Scope of work he can cover
HV LV On behalf of your company, the holder of this certificate shall strictly comply with
ADDC System Safety Rules, HSE Procedures & Guidelines.
Eng. HANI HOSSNI
HSEQ Dept. Manager
Signature of holder : ---------------Date : ----------------
First Issue :
Renewal Date:
Expiry Date:
00.00.0000
00.00.0000
00.00.0000
Cc:

HSE
xxxxxx
Disclaimer:
Contractor's Competent Person should ensure correct implementation of
ADDC SSR on the workmanship provided. Contractor will bear the consequences of
any violation to the approved procedure, and these violations should be reported to
ADDC HSEQ Dept. immediately.
Contractor’s Staff AP Certificate
This is to certify that
Mr. xxxxxxxxxxxxxxxxxxx
of
M/s xxxxxxxxxxxxxxxxxxx
Interviewed on Day. Month .Year for the following contract:
Project:
Contract No:
He has been found satisfactory and hence approved to work
as a
HSE Officer
HSEQ Manager
Cert. No.
Date of Issue
Date of Expiry
HSE Officer Rev.00/2008
: SO 000
:
: Valid for the above mentioned project Contract period.
FM.HSQ.028
PERMIT TO WORK NO:……………….. Permit valid until: Date: ……………….. Time:………………… To…………………………………………………………………. Dept. / Section/ Company ………………………….. Application No …………………………………………………………………………… Date ………………… ISSUE SECTION LOCATION: ………………………………………………………………………… Identification of Equipment: ……………………………… Circuit Identification: …………………………… ………………………………………………………………………………………………………………………….. Nature and Extent of Work to be Done …………………………………………………………………………………...............................................................................................................
.................................................................................................................................................................................................... SYSTEM SAFETY PRECAUTIONS Points of Isolation at ……………………………………………………………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………………………………………………………. Primary Earths Applied at ……………………………………………………………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………………………………………………….. Actions taken to avoid Danger by Draining, Venting, Purging, Containment or Dissipation of Stored Energy ……………………………………………………………………………………………………………………………………………………………………………. Any Additional Precautions / General Safety to be taken during the course of the work to avoid System derived hazards ……………………………………………………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………………………………………………… Earthing Schedule No: ………………. No of Additional Earths issued/Applied: ………………. Key Safe Key No: ………………………… RISSP No……………………………. Flags……………………….. Wristlets…………………….. The following precautions have been met: Safe working area set Y N N/A General safety Identified and instructions are given Y N N/A Instructed to use PPE Y N N/A Correct tools in place Y N N/A ADDC safety rules obeyed Y N N/A Other PTW issued Y N N/A (if Yes, PTW(s) # ………………………) Name of the Control Person Giving Consent to this document …………………………………………………………………………………………. I hereby declare that it is safe to work on the Equipment detailed above Authorized Person Name: ……………………………………………………. (AP Certificate # …………..) Contact No.: ……………………………………… Signature: ………………………………….. Date: …………………………… Time: …….…………………. RECEIPT SECTION I hereby declare that I have satisfied myself that the Equipment stated above is safe to work on and that I have explained the precautions to achieve Safety from the System as well as General Safety to all members of the working party. I further accept responsibility for carrying out and adequately Supervising the work detailed above. Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Contact No.: ……………………………………… Signature: ………………………………….. Date: …………………………… Time: …….…………………. CLEARENCE I hereby declare that all men have been withdrawn and warned that it is no longer safe to work on the above Equipment and that all tools and gear have been removed, leaving the Equipment ready for return to service. Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Signature: ………………………………….. Date: …………………………… Time: …….…………………. CANCELLATION I have considered the Equipment covered by this clearance and I am satisfied that it is fit for operational service. The name of the Control Person agreeing to the cancellation of this document …………………………………………………………….. THE PERMIT TO WORK IS HEREBY CANCELLED Authorized Person Name: ……………………………………………………. (AP Certificate # …………..) Signature: ………………………………….. Date: …………………………… Time: …….…………………. TRANSFER OF SAFETY DOCUMENT APPROVAL
PTW No: ………….. To………………………………………………………………. Dept./Section / Company …………………………………………………………………… Date ………………… REASON OF TRANSFEER SECTION REASON FOR TRANSFER OF SAFETY DOCUMENT ………………………………………………………………………………………………………… Name of the Control Person Giving Consent to the transfer ………………………………………………………………………………………… I hereby declare that the following Safety Document can be transferred to the Incoming Competent Person DECLARATION BY AUTHORISED PERSON I hereby declare that I have satisfied myself that the Equipment stated above is safe to work on and that I have explained the precautions to achieve Safety from the System as well as General Safety to: Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Who will take over the responsibility of supervising the work as shown in the Safety Document. Authorized Person Name: ……………………………………………………. (AP Certificate # …………..) Signature: ………………………………….. Date: …………………………… DECLARATION BY OUTGOING COMPETENT PERSON Time: …….…………………. I hereby declare that I have explained the work situation to the Authorized Person as well as the Incoming Competent Person and that I have supplied him with all the relevant information to safely carry on with the work. Outgoing Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Signature: ………………………………….. Date: …………………………… DECLARATION BY INCOMING COMPETENT PERSON Time: …….…………………. I have considered the Work and the Equipment covered by the Safety Document and declares that I am taking over the responsibility of Supervising the Working Party. I further declare that all members of the Working Party have been informed of the change. Ingoing Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Contact No.: ………………………………….. Signature: ………………………………….. Date: …………………………… Time: …….…………………. ……………………………………………………………………………………………………………………………………………………………………………………………. Note: Both Incoming and Outgoing Competent Persons MUSE have the same scope of Competency level MECHANICAL WORK PERMIT Permit Number: ……………… Issue to: ……………………………………… Section 1: WORK PREPERATION Location of the work Division ………………… Dept. …………………… Nature of the work to be carried out Duration of work …………………………………………………………………………………………………………………………………………. ………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………………………………. ………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………... From To Date: ………. Time: ……. Date: ………….. Time…..… Competent Person Name: ……………………………………… (CP Certificate # …………..) (Contact No: …………………………………. Signature: ………………………………….. Date: …………………… Time: …….…………………. Precautions/Safety measures (use safety precautions checklist)
Point of isolations: ………………………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………………………………………………………………. Other safety Precautions, checklist in back of this permit MUST be filled to ensure all safety precautions have been taken All the workmen involved in this activity have been adequately briefed about the safety requirements of the job daily. Section 2. ISSUE SECTION I have checked personally that the above precautions have been taken and I hereby declare that it is safe to work on the Equipment detailed above Authorized Person Name: ……………………………………………………. (AP Certificate # …………..) Contact No. ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ Signature: ………………………………….. Date: …………………………… Time: …….…………………. Section 3. RECEIPT SECTION I hereby declare that I have satisfied myself that the Equipment stated above is safe to work on and that I have explained to achieve Safety from the System as well as the precautions General Safety to all members of the working party. I further accept responsibility for carrying out and adequately Supervising the work detailed above. Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Signature: ………………………………….. Date: …………………………… Time: …….…………………. Section 4. CLEARENCE SECTION I hereby declare that all men have been withdrawn and warned that it is no longer safe to work on the above Equipment and that all tools and gear have been removed, leaving the Equipment ready for return to service. Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Signature: ………………………………….. Date: …………………………… Time: …….…………………. Section 5. CLEARENCE SECTION I have considered the Equipment covered by this clearance and I am satisfied that it is fit for operational service. THE PERMIT TO WORK IS HEREBY CANCELLED Authorized Person Name: ……………………………………………………. (AP Certificate # …………..) Signature: ………………………………….. Date: …………………………… Time: …….…………………. Safety Precautions Checklist 1. 2. 3. 4. 5. 6. 7. 8. 9. 10 11 12 13 Before work is commenced on any plant, physical isolation and locking of the plant are ensured The Authorized Person issuing Mechanical Permit to Work has ensured himself that the plant has been correctly isolated For boiler forced draught and fuel gas passages: The boiler is out of service Sufficient venting of gases and fumes has been ensured For work inside vessels (including boilers) The vessel has been depressurized and purged All valves through which dangerous fluids may enter the vessel have been locked in the closed position Any mechanical or electrical equipment within the vessel shall has been isolated by the locking off the starter. All gas cylinders are being kept outside the tanks, vessel, or boiler. One person is on stand by while work is being carried out within the confined space Are confined space permit required? For work inside water ducts tunnels The system has been isolated and drained from all sources of danger Adequate venting and / or forced ventilation have been provided Are confined space permit required? For work on tanks and vessels: No person is permitted entry until an Authorized Person is satisfied by testing that all dangerous vapors or gases have been expelled and the vessel is ventilated. Are confined space permit required? For work on pressure vessels, pressure pipe lines etc. All supply and delivery sources are isolated and locked Any pressure pumps and rotating machines are off service and at rest. For work on power driven machine (including cranes & lifting tackle) No work is done on or near the wheel track of an overhead crane or traveling crane in any place where he would be liable to be struck by the crane Appropriate DANGER NOTICE is placed at places of work and Warning Notice at all point of isolation. Hot work Are the work includes any type of hot work I.e. welding, grinding, cutting etc? If yes, are there is any fire hazard? If Yes then Hot work permit required and fire prevention measure to be taken Are hot work permit required? Excavations Are the work includes Excavation? If yes, and excavation deep more than 1.5 meter then excavation Permit required If Yes and Excavation is less than 1.5 meter then excavation safety checklist required For work inside pumping station Need to close the main delivery and discharge valves.
Any precaution required while work is being carried out within the confined space Need permit to access. SPECIALY IN CASE OF PALACES Are hot work permit required? Additional Precautions/measures Y: YES N: NO N/A: NOT APPLICABLE
Permit # ………………… Y N N/A Y N N/A Y N N/A Y N N/A Y N N/A Y N N/A Y N N/A Y Y Y N N N N/A N/A N/A Y N N/A Y Y N N N/A N/A Y N N/A Y N N/A N/A N/A Y Y N N Y N N/A Y N N/A Y N N/A Y N N/A Y N N/A N/A N/A N/A N/A N/A N/A N/A Y Y Y N N N Y Y Y Y N N N N TRANSFER OF SAFETY DOCUMENT APPROVAL
PTW No: ………….. To………………………………………………………………. Dept./Section / Company …………………………………………………………………… Date ………………… REASON OF TRANSFEER SECTION REASON FOR TRANSFER OF SAFETY DOCUMENT ………………………………………………………………………………………………………… Name of the Control Person Giving Consent to the transfer ………………………………………………………………………………………… I hereby declare that the following Safety Document can be transferred to the Incoming Competent Person DECLARATION BY AUTHORISED PERSON I hereby declare that I have satisfied myself that the Equipment stated above is safe to work on and that I have explained the precautions to achieve Safety from the System as well as General Safety to: Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Who will take over the responsibility of supervising the work as shown in the Safety Document. Authorized Person Name: ……………………………………………………. (AP Certificate # …………..) Signature: ………………………………….. Date: …………………………… DECLARATION BY OUTGOING COMPETENT PERSON Time: …….…………………. I hereby declare that I have explained the work situation to the Authorized Person as well as the Incoming Competent Person and that I have supplied him with all the relevant information to safely carry on with the work. Outgoing Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Signature: ………………………………….. Date: …………………………… DECLARATION BY INCOMING COMPETENT PERSON Time: …….…………………. I have considered the Work and the Equipment covered by the Safety Document and declares that I am taking over the responsibility of Supervising the Working Party. I further declare that all members of the Working Party have been informed of the change. Ingoing Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Signature: ………………………………….. Date: …………………………… Time: …….…………………. Note: Both Incoming and Outgoing Competent Persons MUSE have the same scope of Competency level LIMITED ACCESS PERMIT NO: ……………….. LAP valid until: Date: ……………….. Time: ………………… To Mr. ……………………………………………………………………..… Dept. / Section/ Company …………………………………………………. Application No ………………………….. Date ………………… ISSUE SECTION LOCATION: …………………………………………………………………………………………………………………………………………………………………………. Identification of Equipment: ……………………………………………………………………………………………………………………………………………….. Circuit Identification …………………………………………………………………………………………………………………………………………………………. Working NEAR Equipment Nature of the work Working ON Equipment Nature and Extent of work to be Done ……………………………………………………………………………………………………………………………………………………………………………………………
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…………………………………………………………………………………………………………………………………………………………………………………………. The following precautions have been met: Safe working area set Y N N/A General safety Identified and instructions are given Y N N/A Instructed to use PPE Y N N/A Correct tools in place Y N N/A ADDC safety rules obeyed Y N N/A EQUIPMENT UNER PTW / SFT Y N N/A (if Yes, Do NOT issue LAP) LIMITS OF WORK and/or WORK AREA …………………………………………………………………………………………………………………………………………………………………………………… The following hazards have been identified and control measures assessed ……………………………………………………………………………………………………………………………………………………………………………………………
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……………………………………………………………………………………………………………………………………………………………………………………….. Precautions to be taken for a Safe System of Work and to avoid System derived hazards ……………………………………………………………………………………………………………………………………………………………………………………………
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……………………………………………………………………………………………………………………………………………………………………………………………. Name of the Control Person Giving Consent to this document …………………………………………………………………………………………… I hereby declare that it is safe to work within the limits of work and/or work area detailed above Authorized Person Name: ……………………………………………………. (AP Certificate # …………..) Contact No.: ………………………………… Signature: ………………………………….. Date: …………………………… Time: …….…………………. RECEIPT SECTION I hereby declare that I have satisfied myself that it is safe to work within the limits of work and/or work area described above and that I have explained the precautions to achieve Safety from the System as well as General Safety to all members of the Working Party. I accept responsibility for carrying out and adequately Supervising the work above. Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Contact No.: ………………………………… Signature: ………………………………….. Date: …………………………… Time: …….…………………. CLEARENCE I hereby declare that all men have been withdrawn and warned that it is no longer safe to work within the limits of work and/or work area detailed above and that all tools and gear have been removed. Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Signature: ………………………………….. Date: …………………………… Time: …….…………………. CANCELLATION The name of the Control Person agreeing to the cancellation of this document ……………………………………………………………… THE LIMITED ACCESS PERMIT IS HEREBY CANCELLED Authorized Person Name: ……………………………………………………. (AP Certificate # …………..) Signature: ………………………………….. Date: …………………………… Time: …….…………………. SANCTION FOR TEST NO: ……………….. SFT valid until: Date: ……………….. Time: ………………… To: Mr. …………………………………………………………………….. Dept. / Section/ Company ……………………………………………… Application No ………………………….. Date ………………… ISSUE SECTION LOCATION: …………………………………………………………………………………………………………………………………………………………………………. Identification of Equipment ……………………………………………………………………………………………………………………………………………….. Circuit Identification ………………………………………………………………………………………………………………………………………………………… Nature and Extent of Testing to be Done ……………………………………………………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………………………………………………… SYSTEM SAFETY PRECAUTIONS Points of Isolation at …………………………………………………………………………………………………………………………………………………………………………………………… Primary Earths Applied at ……………………………………………………………………………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………………………………………………………………………… Actions taken to avoid Danger by Draining, Venting, Purging, Containment or Dissipation of Stored Energy ……………………………………………………………………………………………………………………………………………………………………………………………. Any Additional Precautions to be taken during the course of the work to avoid System derived hazards … ……………………………………………………………………………………………………………………………………………………………………………………………
The following precautions have been met: Safe working area set Y N N/A General safety Identified and instructions are given Y N N/A Instructed to use PPE Y N N/A Correct tools in place Y N N/A ADDC safety rules obeyed Y N N/A Other PTW issued Y N N/A (if Yes, Do NOT Issue SFT) Safety Precautions that may be varied by the Competent Person during Testing ………………………………………………………….. Earthing Schedule No ………………. No of Additional Earths issued/Applied ……………….. Key Safe Key No ………. RISSP No……………………………. Flags……………………….. Wristlets……………….. Name of the Control Person Giving Consent to this document ……………………………………………………………………………………….. I hereby declare that it is safe to work on the Equipment detailed above Authorized Person Name: ……………………………………………………. (AP Certificate # …………..) Contact No.: …………………………………….. Signature: ………………………………….. Date: …………………………… Time: …….…………………. RECEIPT SECTION I hereby declare that I have satisfied myself that it is safe to commence testing on the Equipment identified above and that I have explained the precautions to achieve Safety from the System as well as General Safety to all members of the working party. I accept responsibility for carrying out and adequately Supervising the testing as detailed above. Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Contact No.: …………………………………….. Signature: ………………………………….. Date: …………………………… Time: …….…………………. CLEARENCE I hereby declare that all men have been withdrawn and warned that it is no longer safe to continue testing on the above Equipment and that all tools and gear have been removed, leaving the Equipment ready for return to service. Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Signature: ………………………………….. Date: …………………………… Time: …….…………………. CANCELLATION I have inspected the Equipment covered by this clearance and I am satisfied that it is fit for operational service. The name of the Control Person agreeing to the cancellation of this document………………………………… THE SANCTION FOR TEST IS HEREBY CANCELLED Authorized Person Name: ……………………………………………………. (AP Certificate # …………..) Signature: ………………………………….. Date: …………………………… Time: …….…………………. RECORD OF INTER-SYSTEM SAFETY PRECAUTIONS
(RISSP)
No: ……………………… Requesting Party: ………………………………….. Location………………………………………. Contact No.: …………………………… Implementing Party: ……………………………….. Location………………………………………. Contact No.: …………………………… REQUEST Equipment to be Isolated (Attach additional information / drawings as required) ……………………………………………………………………………………………………………………………………………………………………………………
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…………………………………………………………………………………………………………………………………………………………… Period of Isolation requested (Date and Time) From Date: ……………………………… Time: ………………….. To: Date: ……………………………… Time: ………………… Safety Precautions Requested Identification No Description of Apparatus Safety Precautions Requested by Requesting Safety Coordinator (Authorized Person) Name: ……………………………………………………. (AP Certificate # …………..) Signature: ………………………………….. Date: …………………………… IMPLEMENTATION CONFIRMATION Safety Precautions Implemented
Identification No Description of Apparatus Time: …….…………………. Safety Precautions Implementation Confirmed by Implementing Safety Coordinator (Authorized Person) I hereby declare that the requested isolations/ precautions have been implemented in the Equipment detailed above and the isolations / precautions have been tagged and locked and the keys have been secured in the key safe box # …………… and the key safe key handed over with the approved RISSP Name: ……………………………………………………. (AP Certificate # …………..) Signature: ………………………………….. Date: …………………………… Time: …….…………………. CLEARANCE I hereby declare that the Job Completed and Implemented Safety Precautions may be cleared. And Key safe key returned Clearance Authorization by Requesting Safety Coordinator (Authorized Person) Name: ……………………………………………………. (AP Certificate # …………..) Signature: ………………………………….. Date: …………………………… Time: …….…………………. CLEARANCE CONFIRMATION Implemented Safety Precautions have been cleared. Clearance Confirmed by Implementing Safety Coordinator (Authorized Person) Name: ……………………………………………………. (AP Certificate # …………..) Signature: ………………………………….. Date: …………………………… Time: …….…………………. HOT WORK PERMIT Associated PTW # ………………………….. Hot work Permit # …………………………………….. Issue to : …………………………………………………………….. Division ………………………… Dept ……………………………… Section 1: Preparation Location of the work : Reason for excavation : From
____ To ____ On _____ Date___ Other safety Precautions, HOT work checklist in back of this permit MUST be filled by the competent Person to ensure all safety precautions have been taken All the workmen involved in this activity have been adequately briefed about the safety requirements of the job daily. Section 2. ISSUE SECTION Approximate duration of work : I have checked personally that the attached HOT work precautions have been taken. I authorize Mr……………….. to start hot work. Authorized Person Name: ……………………………………………………. (AP Certificate # …………..) Contact No.: ……………………………………………… Signature: ………………………………….. Date: …………………………… Time: …….…………………. Section 3. ENDORSEMENTS: (Endorsements are valid for max. 12 hours) I have re‐examined the work site and agree work may continue under the above condition. (S) Authorized Person (∗) Competent Person Date Time Sign S S S S S S S S ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ Section 4. RECEIPT SECTION I hereby declare that I have satisfied myself that the precautions mentioned above are safe to work on and that I have explained the precautions to achieve General Safety to all members of the working party. I further accept responsibility for carrying out and adequately Supervising the work detailed above. Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Contact No.: …………………………………………………. Signature: ………………………………….. Date: …………………………… Time: …….…………………. Section 4. CLEARENCE SECTION I hereby declare that all hot work has been completed safely and all the safety precautions cleared and no danger of fire Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Signature: ………………………………….. Date: …………………………… Time: …….…………………. Section 5. CLEARENCE SECTION I have considered the Equipment covered by this clearance and I am satisfied that the hot work has been completed and the work site fire hazard has cleared. THE PERMIT TO WORK IS HEREBY CANCELLED Authorized Person Name: ……………………………………………………. (AP Certificate # …………..) Signature: ………………………………….. Date: …………………………… Time: …….…………………. Hot Work Permit Checklist YES NO N/A Precautions/safety measures (Tick relevant ones) 1. Area cleared of loose combustible materials Y N N/A 2. Clear exit route provided Y N N/A 3. Work area and open‐drain covers / spark guards provided Y N N/A 4. Pipes / vessels depressurized, drained and purged by Nitrogen Y N N/A 5. Non‐sparking tools and explosion proof equipments provided Y N N/A 6. Proper protective clothing provided Y N N/A 7. Adequate fire extinguishers provided Y N N/A Others: 14 Other isolations / precautions ……………………………………………………………………………………………………………………………………………………………………………………………………………
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…………………………………………………………………………………………………………………………………………………………………………………………………………… I hereby certify I have inspected the work site and it is free of fire hazards. Danger notices are posted. Fire watch provided YES NO All the workmen involved in this activity have been adequately briefed about the safety requirements of the job Daily. Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Contact No.: ……………………………………… Signature: ………………………………….. Date: …………………………… Time: …….…………………. CONFINED SPACE ENTRY PERMIT CSP No.: ………………………… Associated PTW # …………… Issue to: ……………………………………………………………. Division ………………… Dept. …………………… Section 1: WORK PREPERATION Location of the work Nature of the work to be carried out Duration of work From To Date: ………. Time: ……. Date: ………….. Time:……... Precautions/safety measures (Tick relevant ones) 1. Y N Has the area been fenced/cordoned off? 2. Y N Has proper illumination been arranged? 3. Y N Have traffic diversion signs (flashers at night) been kept? 4. Y N Have all concerned persons been informed? 5. Y N Has gas test been done to check the absence of flammable gases? LEL% ………. 6. Y N Is there enough ventilation? 7. Y N Have low voltage & flameproof lighting been arranged? Max 24 V DC Have necessary safety appliances been provided? (ropes, tripod, pulley, winch, 8. Y N ladders) 9. Y N Will there be a stand‐by person outside the manhole? 10. Is the confined space checked for oxygen level? 19.5 to 23.5 % ‐ O2 level …………… Y N 11. If any toxic gases are anticipated, has it been checked? Level ……………….. Y N 12. Any other precautions taken? Y N N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All the workmen involved in this activity have been adequately briefed about the safety requirements of the job today. Section 2. ISSUE SECTION I have checked personally that the above precautions have been taken. and I hereby declare that it is safe to authorize Mr._____ to send ………… number of workmen inside the confined space. Authorized Person Name: ……………………………………………………. (AP Certificate # …………..) Signature: ………………………………….. Date: …………………………… Time: …….…………………. Section 3. Permit completion The manhole cover/grill has been placed back in position properly at …….. (hrs.) on ………….. Date ………….. after the work was completed and safety arrangements have been removed and the area is cleared. Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Signature: ………………………………….. Date: …………………………… Time: …….…………………. Safety Limits: Concentration of H2S shall be restricted to less than 10PPM Percentage of O2 (19.5 to 23.5%. First copy shall be maintained at the place of work and the second copy with the "approving authority". After the work is completed, the first copy shall be returned to the approving authority". The associated PTW can be canceled if the related works are cleared accordingly Excavation Permit Associated PTW # ………………………….. Excavation Permit # …………………………………….. Issue to : ………………………………………………………… Division ………………………… Dept ……………………………… Section 1: Preparation Location of the work : Reason for excavation : Approximate duration of work : From____ To ____ On _____ Date___ Other safety Precautions, Excavation checklist in back of this permit MUST be filled by the competent Person to ensure all safety precautions have been taken All the workmen involved in this activity have been adequately briefed about the safety requirements of the job daily. Section 2. ISSUE SECTION I have checked personally that the above precautions have been taken. I authorize Mr.____ to send ….… number of workmen inside the confined space. Authorized Person Name: ……………………………………………………. (AP Certificate # …………..) Contact No: ………………………………….. Signature: ………………………………….. Date: …………………………… Time: …….…………………. Section 3. RECEIPT SECTION I hereby declare that I have satisfied myself that the precautions mentioned above are safe to work on and that I have explained the precautions to achieve General Safety to all members of the working party. I further accept responsibility for carrying out and adequately Supervising the work detailed above. Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Contact No.: ……………………………………….. Signature: ………………………………….. Date: …………………………… Time: …….…………………. Section 4. CLEARENCE SECTION I hereby declare that all men have been withdrawn and warned that it is no longer safe to work on the above Equipment and that all tools and gear have been removed, leaving the Equipment ready for return to service. Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Signature: ………………………………….. Date: …………………………… Time: …….…………………. Section 5. CLEARENCE SECTION I have considered the Equipment covered by this clearance and I am satisfied that it is fit for operational service. THE PERMIT TO WORK IS HEREBY CANCELLED Authorized Person Name: ……………………………………………………. (AP Certificate # …………..) Signature: ………………………………….. Date: …………………………… Time: …….…………………. Excavation Permit Checklist YES NO N/A Precautions/safety measures (Tick relevant ones) 1. Has the area been fenced/cordoned Y N N/A 2. Has proper illumination been arranged? Y N N/A 3. Have traffic diversion signs been kept? Y N N/A 4. Have all concerned persons been informed? Y N N/A 5. Has the location of utility installations been located prior to opening the excavation Y N N/A 6. Are underground installations protected, supported or removed to ensure safety? Y N N/A 7. Are support systems (shoring) provided to ensure stability of the structures Y N N/A 8. Have all surface encumbrances been removed Y N N/A 9. Has gas test been done to check the absence of flammable gases? Y N N/A 10. Is there enough ventilation? Y N N/A 11. Has water been removed if deemed necessary? Y N N/A 12. Any other precautions taken? Y N N/A 13. Is there an Excavation Plan for the planned excavation work? Y N N/A Others: 14 Type of soil identified ………………………………………………………………………………………………………………………………………………………………………………………………………….. Type of Cave‐in Control used: ……………………………………………………………………………………………………………………………………………………………………………………………………………
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………………………………………………………………………………………………………………………………………………………………………………………………………….. Shielding structure (trench box) able to support forces ……………………………………………………………………………………………………………………………………………………………………………………………………………
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………………………………………………………………………………………………………………………………………………………………………………………………………….. Shoring system ……………………………………………………………………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………………………………………………………………… All the workmen involved in this activity have been adequately briefed about the safety requirements of the job Daily. Competent Person Name: ……………………………………………………. (CP Certificate # …………..) Contact No.: ………………………………. Signature: ………………………………….. Date: …………………………… Time: …….…………………. Safety Clearance Certificate
On Day: ………………………… Date: …………. 20___, at ………………. hrs In………………………………………………………………………………………………………………………….. (Location) the ……………………………………………………………………………………………………………………. (Equipment) Will become subject to the System Safety Rules of the Abu Dhabi Distribution Company (ADDC) and is to be considered operational with the inherent dangers from the electrical equipment. All contractors’ and ADDC staff are to be withdrawn from the ……………………….. (Location) And work is not to proceed without a written approval on an issued Safety Document by an Authorized Person from the Abu Dhabi Distribution Company (ADDC) Electricity O&M Director Date …………………………. Received: PROJECTS DIRECTORATE, ADWEA (if applicable) Name…………………………. PROJECTS DIVISION MANAGER, ADDC Signed: ………………. Date: ……………. Signed: ………………. Date: ……………. PROJECT CONSULTANT Name…………………………. Signed: ………………. Date: ……………. Signed: ………………. Date: ……………. Asset Management Director – ADDC Signed: ………………. Date: ……………. PROJECT CONTRACTOR Name…………………………. Water O&M Director, ADDC (if applicable) Signed: ………………. Date: ……………. Construction Dept. Manager HSEQ Manager, ADDC Signed: ………………. Date: ……………. Signed: ………………. Date: ……………. Others ……………………………………………………….. ……………………………………………………….. Signed: ………………. Signed: ………………. Date: ……………. Date: ……………. Safety De-clearance Certificate
On Day: ………………………… Date: …………. 20___, at ………………. hrs In………………………………………………………………………………………………………………………….. (Location) the ……………………………………………………………………………………………………………………. (Equipment) Will NOT be subject to the System Safety Rules of the Abu Dhabi Distribution Company (ADDC) and is to be considered disconnected and removed from the system. Electricity O&M Director Date …………………………. Received: Asset Management Director – ADDC Signed: ………………. Date: ……………. Water O&M Director, ADDC (if applicable) Signed: ………………. Date: ……………. Construction Dept. Manager PROJECTS DIVISION MANAGER, ADDC HSEQ Manager, ADDC Others ……………………………………………………….. ……………………………………………………….. Signed: ………………. Date: ……………. Signed: ………………. Date: ……………. Signed: ………………. Date: ……………. Signed: ………………. Signed: ………………. Date: ……………. Date: …………….