bsp-02-standard-1630 - general electrical safety (mod 13, rev. 4.0)

Brunei Shell Petroleum Company Sendirian Berhad

BSP-02 -Standard-1630

H S E S T A N D A R D

M O D U L E 1 3 G E N E R A L E L E C T R I C A L

S A F E T Y

T H I S D O C U M E N T C O N T A I N S O N E

M O D U L E I N A S E T C O M P R I S I N G H S E S T A N D A R D S F O R T H E B R U N E I S H E L L

J O I N T V E N T U R E C O M P A N I E S

Revision 4.0

Owner:

Author:

SFE/4

SFE/43

BSP – General Electrical Safety Module 13

General Electrical Safety – Rev 4.0 of 29

Document Control DOCUMENT TYPE DOCUMENT OWNER SECURITY CLASSIFICATION Standard SFE/4 Unclasified DOCUMENT REFERENCE AUTHOR APPROVED BY TMS 1630 SFE/43 HSE KEY WORDS electrical, electrical safety, electrical tools

Revision Record

REV REVISION DESCRIPTION DATE 1.0 1st Issue Oct 1996 2.0 2nd Issue Dec 1999 3.0 3rd Issue incorporating, amendment to section 3.2 and 3.8, conversion from

Pagemaker to MS-Word Nov 2002

4.0 Revised to include “Section 4.8 Certified Equipment for Hazardous Area” (May 2004 Corporate HSE MS Audit Action Point).

Aug 2004

Distribution Control

Distribution of this document is controlled by the Document Owner. This document is available on the BSP Intranet> Homepage> Corporate>HSE>HSE Documentation.

Notice and Warning

Copyright 2001, Brunei Shell Petroleum Company Sendirian Berhad

This document is the property of Brunei Shell Petroleum Sendirian Berhad (BSP), KB3534, Negara Brunei Darussalam. Circulation is restricted to BSP and its designated associates, contractors and consultants. It must not be copied or used for any other purpose other than which it is supplied, without the expressed written authority of BSP.

Except where provided for purposes of contractual requirements, BSP disclaims any responsibility or liability for any use or misuse of the document by any person and makes no warranty as to the accuracy or suitability of the information to any third party. Any misuse of the document is repressible by BSP.



C O N T E N T S

1 INTRODUCTION................................................................................................................. 4 2 PERSONNEL AND PROCEDURES................................................................................... 5

2.1 Personnel 5 2.2 Personnel Records 5 2.3 Safety Procedures 5 2.4 Incident and Accident Reporting 6

3 TOOLS, APPLIANCES AND MOBILE EQUIPMENT ......................................................... 7 3.1 General Requirements 7 3.2 Plugs and Socket Outlets 7 3.3 Leads and Extension Cords 7 3.4 Power Tools 7 3.5 Appliances 8 3.6 Mobile Generator Sets 8 3.7 Electric Welding Machines 10 3.8 Inspection and Testing of Tools and Mobile Equipment 10

4 ELECTRICAL INSTALLATIONS....................................................................................... 12 4.1 Regulations and Standards for Electrical Installations 12 4.2 Work on Electrical Installations 12 4.3 Inspection and Testing of Electrical Installations 12 4.4 Power Supply Voltages 12 4.5 Earthing in Electrical Installations 12 4.6 Temporary Electrical Installations (General Requirements) 13 4.7 Temporary Electrical Installations (Construction Sites) 14 4.8 Certified Equipment for Hazardous Area 15

5 EARTHING AND BONDING OF NON-ELECTRICAL EQUIPMENT................................ 16 5.1 General 16 5.2 Lightning Protection 16 5.3 Static Electricity 16

6 WORKING NEAR OVERHEAD LINES............................................................................. 17 6.1 General 17 6.2 Construction Near Overhead Lines (No Passage) 17 6.3 Construction Near Overhead Lines (With Passage) 17 6.4 Construction Under Overhead Lines 17

7 BIBLIOGRAPHY ............................................................................................................... 18 8 GLOSSARY OF TERMS................................................................................................... 19 9 APPENDICES ................................................................................................................... 21

9.1 Appendix 1 - Boundry Conditions 21 9.2 Appendix 2 - Power Supplies and Applications 22 9.3 Appendix 3 - Inspection and Test Identification System for Tools and Equipment 23 9.4 Appendix 4 - Inspection and Testing of Electrical Installations 25 9.5 Appendix 5 - Minimum Values of Insulation Resistance 26 9.6 Appendix 6 - Treatment Of Electric Shock 27



1 I N T R O D U C T I O N This document is for the use of the staff of Brunei Shell Joint Venture Companies (BSJVC) and their Contractors.

HSE Standard Module 13 - General Electrical Safety, in conjunction with the Module 10 - Electrical Safety Rules (ESR), forms the basis of the electrical safety requirements of BSJVC. The objective of Module 13 - General Electrical Safety is to ensure that work not covered by the provisions of the ESR is conducted in a safe manner.

Module 13 - General Electrical Safety applies to all electrical work within BSJVC facilities where the ESR do not apply, and all BSJVC related work within Contractor facilities where required by the Contract.

Within BSJVC facilities General Electrical Safety applies to:

• Electrical tools and appliances.

• Mobile electrical equipment.

• Single phase Low Voltage electrical equipment in domestic accommodation (onshore and offshore), office buildings, commercial and semi-industrial premises.

• Temporary Electrical Installations



2 P E R S O N N E L A N D P R O C E D U R E S

2.1 Personnel

Only Qualified Electrical Persons are permitted to perform work on electrical equipment or systems. This includes all work on electrical equipment and installations, and all testing and fault finding.

For BSP staff the minimum job level for a person to be considered a Qualified Electrical Person is TAS 10 (Electrical).

Contractor’s personnel shall be competent and able to carry out the duties of an electrical person. The level of Qualified Electrical Person shall include technician, foreman and worksite supervisor. The contractor is to ensure that their qualification, training and experience are fulfilled in line with the requirements of the respective contract document.

2.2 Personnel Records

Personnel records must be kept for all Qualified Electrical Persons working within BSJVC

facilities or on BSJVC related projects.

For BSJVC employees these records are kept by BSJVC.

Contractors to BSJVC shall ensure that records are maintained for all Qualified Electrical Persons employed by the Contractor whether directly, or indirectly via subcontract. The Contractor’s personnel records shall include:

• Full name of employee.

• Date of birth.

• Record of electrical training and qualifications including copies of relevant certificates.

• Work history.

• Authorisation Certificate issued under the ESR (for Worksite Supervisors).

2.3 Safety Procedures

All work on electrical equipment or systems which is live or is capable of being made live shall be controlled by a documented Safety Procedure. The Safety Procedure shall describe how switching, testing, fault finding, isolation, and de-isolation is controlled in order to ensure safety. The Safety Procedure shall clearly define the responsibilities and authorities of personnel in relation to the electrical work.

For work on HV systems and permanent three phase systems within BSJVC facilities, the applicable safety procedure is HSE Standard Module 10 - Electrical Safety Rules, augmented as required by Electrical Safety Procedures (ESP) and Electrical Safety Operational Procedures (ESOP) (refer to Table 2 for further definition of the area for the application of the ESR).

In those areas where the ESR do not apply, the BSJVC Department or Contractor undertaking the work shall provide the required Safety Procedure. The Safety Procedure shall be approved in writing by appropriate BSJVC electrical personnel prior to commencement of the work. The appropriate BSJVC electrical personnel are the division RPE or Head Electrical Engineering (SFE/4). The Safety Procedure may be generic, covering all work undertaken by the Department or Contractor, or may be specific to the task, as appropriate. The Safety Procedure shall, in addition to the requirements of this Standard, include:



• A title reflecting the associated activity.

• A statement of scope.

• A statement of objective.

• A statement of responsibilities

• A description of the work, equipment or system covered by the procedure.

• A detailed description of the safety procedure

Table 2 - Application of Electrical Safety Procedures

System Location / Equipment Safety Procedure

High Voltage All locations ESR applies

Three phase low Permanent electrical installations ESR applies

Voltage Temporary electrical installations ESR applies

Single phase low voltage

Single phase distribution feeders within permanent three phase distribution equipment

ESR applies

Single phase final circuits and consumer units

Procedure developed by Contractor or Department

High energy storage batteries

All locations Procedure developed by Contractor or Department

2.4 Incident and Accident Reporting

All incidents or accidents of an electrical nature shall be reported to the supervisor of the work who shall ensure that it is investigated and reported in accordance with HSE Standard Module 30 - Incident Reporting and Investigation Procedures.

All potentially dangerous situations or conditions involving electricity, and all cases of electrical equipment suspected of being in an unsafe condition, must be reported immediately to the Worksite Supervisor or to the Responsible Person Electrical (RPE).

In all cases, any equipment which gives rise to a dangerous or potentially dangerous situation shall be removed from service, isolated, and tagged “Do Not Use”. The equipment shall remain out of service until it has been investigated and deemed safe by a Qualified Electrical Person at least equivalent to an Electrical Foreman, or in the case of equipment owned by BSP, by an Authorised Electrical Person.



3 T O O L S , A P P L I A N C E S A N D M O B I L E E Q U I P M E N T

3.1 General Requirements

All electrical tools, appliances and mobile equipment shall be constructed to a recognised national standard by a reputable manufacturer. They shall be designed for the supply voltage and frequency with which they are to be used. The rated voltage and frequency shall be clearly identified on the body of the equipment.

The inspection, testing and use of electrical tools and mobile equipment shall be in accordance with HSE Standard Module 12 - Machinery and Tools.

3.2 Plugs and Socket Outlets

Plugs and socket outlets used outdoors or in industrial or semi-industrial environments shall be to IEC 309 or BS EN 60309.

Plugs and socket outlets used indoors in domestic, office or commercial environments shall be to BS 1363 or BS EN 60307, shall have a minimum current rating of 13 A, and shall be individually, manually switched. The plugs shall be impact resistant.

Plug and socket pin configurations shall be such as to prevent inadvertent use of the tools, appliances or equipment with the wrong supply voltage.

Multi-socket outlet boxes may be used to provide additional socket outlets when required, but shall be provided with no more than four socket outlets in each box. The use of socket outlet adaptors is prohibited.

Two pin plugs without fuse shall be replaced with three pin plugs with suitable fuse protection.

3.3 Leads and Extension Cords

Leads and extension cords used outdoors or in industrial or semi-industrial environments shall be rubber insulated and sheathed with heavy duty neoprene.

Leads and extension cords used in domestic, office or commercial environments shall be PVC or rubber insulated and sheathed with heavy duty PVC.

Conductors used in leads and extension cords shall have a cross-sectional area providing a current rating no less than the rating of the circuit protection device, but shall in any case not be less than 1.5mm2.

Extension cords shall not be more than 50m long. They shall not be used to extend more than one level above or below the worksite and as far as is practical shall be protected or kept clear of the floor or ground.

Extension cord may serve more than one socket outlet if they are mounted on a common outlet box, “daisy-chained” socket outlets from a single extension cord is not permitted.

3.4 Power Tools

The term power tools covers the following electrically operated equipment:

• hand lamps

• hand held power tools such as drills and grinders

• fixed power tools such as drill presses

• bench saws and large moving tools such as plate grinders and polishers

• battery power tools



Power tools are classified in accordance with IEC Standards as follows:

Class I: Tools having basic insulation and which include a means of connection of exposed metal parts to a protective conductor.

Class II: Tools which are double insulated or which have reinforced insulation, and which are not intended to be earthed.

Class III: Tools which receive supply at Safety Extra Low Voltage (SELV).

The use of Class II or Class III power tools is always preferred, and is mandatory for hand lamps and hand held power tools.

Fixed power tools such as drill presses, and bench saws, and large moving power tools such as plate grinders and polishers, may be Class I type if no suitable Class II or Class III power tool is available.

Class I power tools shall only be used with a power supply connected via either a 30mA Residual Current Device, or an isolating transformer. The earth connection to the Class I power tool shall preferably be located externally and be easily visible for inspection.

The permissible voltage ratings for power tools for use in various locations are shown in Appendix 2.

3.5 Appliances

The term appliances covers items such as urns, kettles, vacuum cleaners and other such domestic or commercial equipment. The use of Class II appliances is preferred where ever possible. Class I appliances may be used where Class II appliances are not available. Class I appliances shall only be used with a power supply connected via either a 30mA Residual Current Device, or an isolating transformer. Care should be taken to ensure that the earth connection is in sound condition and that the appliance lead is not damaged.

3.6 Mobile Generator Sets

Mobile generator sets may be required when no suitable permanent mains supply is available.

The frame and neutral of mobile generator sets shall be connected to earth. Typical earthing arrangements for three phase and single phase mobile generator sets are shown in figure 1 on the following page. The maximum acceptable resistance to earth is 4 ohms.

Mobile generator sets shall be provided with over-current devices to protect the distribution switchboard and connecting cables. In addition, mobile generator sets shall be equipped with suitable earth fault protection devices if the over-curren devices could not detect/clear an earth fault. For large mobile generator sets the protection devices may be located in the distribution switchboard; for small units they shall be located on the generator skid. Where the protection devices are located at the distribution switchboard, the cables from the generator to the switchboard shall be mechanically protected and shall be as short as possible.

Mobile generators sets shall be provided with a means of isolating the generator supply from the distribution system. The means of isolation may be installed either at the generator, or at the point where the incoming generator supply connects to the distribution switchboard.

Mobile generator sets shall be diesel engine driven.



Figure 1(a) Typical Earthing Arrangement for Three Phase Mobile Generator

Figure 1(b) Typical Earthing Arrangement for Single Phase Mobile Generator



Figure 1(c) - Typical Arrangement of Earth Connections

3.7 Electric Welding Machines

Electric welding machines shall be the DC type. AC welding machines may only be used if approved, in writing, by the Contract Holder.

A return cable shall always be connected between the work piece and the welding machine, with the connection to the workpiece being as close as possible to the point of work. The return cable shall be an integral part of the machine. Steel structures and pipelines shall not be used as return paths.

Diesel engine driven welding machines which provide auxiliary power supplies shall be earthed in accordance with the requirements for mobile generator sets.

GTAW (TIG) welding machines shall be provided with a remote control switch which controls the gas flow and DC output of the machine. The switch shall be a non-latching type which, when released, cuts off the DC and HF output. GTAW welding machines shall be provided with weather protection enclosures.

When using the HF starters of GTAW welding machines in operational areas, care must be taken to minimise potential interference with instrumentation and communication equipment. The following precautions are recommended:

• The welding machine should be installed as close as possible to the work piece.

• The welding machine casing earth terminal should be connected to the local earth.

• The welding machine frequency generator should not be operated within 15m of communication and/or instrument circuits. Where this is not possible, the operator of the facility should be advised of the potential for interference within the circuits and shall agree to the placement of the equipment.

3.8 Inspection and Testing of Tools and Mobile Equipment

All electrical tools and mobile equipment shall be inspected and tested prior to first use and at intervals not exceeding six months thereafter. In addition, all mobile electrical equipment shall be inspected each time the equipment is relocated. On successful completion of testing and inspection, an inspection tag shall be fixed to the tool or item of equipment. Sample inspection tags are shown in Appendix 3.

It is the responsibility of the owners of tools and equipment to ensure that testing and inspection is carried out correctly and in a timely manner. Each owner of tools and equipment shall maintain an Inspection Register. The Inspection Register shall include the serial number, type of equipment, last inspection date, and next scheduled inspection date for every tool and item of equipment owned.

Tools and equipment owned by BSJVC shall be inspected and tested by an Authorised Electrical Person. Tools and equipment owned by Contractors shall be inspected and tested by a Qualified Third Party Inspector approved by BSP.



Electrical tools and mobile equipment for which the due inspection date has passed shall not be used until re-inspected. Where the due inspection date has passed without re-inspection, a “Do Not Use” tag shall be attached to the tool or equipment.

The inspection and testing of electrical tools and mobile equipment shall include:

• A visual check of the external condition for physical damage or deterioration.

• Inspection of power and earth connections.

• Inspection of the supply cable or lead.

• Insulation resistance test of equipment and leads. (Minimum acceptable values are given in Appendix 5)

• Checking the polarity of plug and socket connections.

• Checking the operation of protection devices including shutoff switches, Residual Current Devices and protection relays.

• Testing and inspecting of metering and instruments

In addition to the formal inspection and testing conducted in accordance with the above requirements, it is the responsibility of all users of tools and equipment to ensure that the tool and/or equipment is in sound condition prior to each use.



4 E L E C T R I C A L I N S T A L L A T I O N S

4.1 Regulations and Standards for Electrical Installations

Electrical installations shall comply with the requirements of the latest edition of the IEE Wiring Regulations (BS 7671) and the Negara Brunei Darussalam Electrical Enactment 1972 and amendments thereto. All electrical equipment within an installation shall be in accordance with IEC and/or BSI standards.

4.2 Work on Electrical Installations

Work on equipment within a live electrical installation shall be conducted in accordance with a Safety Procedure as described in Section 2.3.

Work on any portion of an electrical installation shall only be performed once the relevant circuit has been isolated and proved dead. The isolation shall be performed in accordance with the relevant Safety Procedure but as a minimum shall involve switching off the circuit breaker or removing the fuse supplying the circuit and placing a caution tag at the point of isolation.

4.3 Inspection and Testing of Electrical Installations

All electrical installations within BSJVC facilities, whether permanent or temporary, including installations on construction sites, shall be inspected and tested by a Qualified Electrical Person prior to first energisation.

The inspection and testing of an electrical installation shall be conducted according to the particular procedures and specifications applicable to the installation or project. Minimum requirements for inspection and testing are given in Appendix 4. The results of all inspections and tests shall be recorded and records maintained for the duration of the installation.

4.4 Power Supply Voltages

Supply voltages applied for various applications within BSJVC facilities, including both permanent and temporary installations, are shown in Appendix 2.

4.5 Earthing in Electrical Installations

The metallic enclosure of all electrical equipment forming part of an electrical installation shall be effectively connected to earth prior to energisation of the equipment. The resistance to earth shall not exceed 4 ohms.

Earth cables shall have copper conductors with a minimum cross sectional area of 16mm2, and a green/yellow striped PVC sheath.

For stand-alone electrical installations (such as installations powered from a dedicated generator or distribution transformer), the preferred system of earthing is TN-S in accordance with the IEE Wiring Regulations and as illustrated in Figure 2. The use of alternative systems shall be approved in writing by SFE/4.



Figure 2 - TN-S Earthing System

4.6 Temporary Electrical Installations (General Requirements)

4.6.1 General

A temporary electrical installation is any interconnection of generators, switchboards or distribution boards installed for a limited duration, e.g. for undertaking construction or maintenance activities onshore or offshore. The temporary electrical installation includes all associated interconnecting cables and earthing systems.

Temporary Electrical Installations shall be designed and installed according to the requirements of the IEE Wiring Regulations.

4.6.2 Switchboards and Distribution Boards

Switchboards and distribution boards used for temporary power distribution shall be in accordance with the requirements of BS EN 60439-4 “Low Voltage Switchgear and Control gear Assemblies”. Temporary distribution boards shall be located as close as practical to the work being performed.

4.6.3 Underground Cables

Burial depth for temporary underground cables shall be sufficient to avoid damage from construction activities. The minimum acceptable depth of burial is 600mm.

Underground temporary cables shall be marked ‘Temporary Cable: Project No. xxxxx’. The text shall be indelibly imprinted in non-corroding strips sufficiently long to be wrapped twice around the cable.

Route markers shall be provided on the surface above the temporary underground cable, at every change of direction and at crossings.

Continuous red marker tape shall be buried within 150mm of the surface, above the route of the buried cable. Cable tiles, preferably yellow, shall be installed above the cables.

A site plan showing the locations of all underground cables shall be developed and kept up to date at all times. This plan shall be readily available on site.



Excavation activities shall be carried out in accordance with HSE Standard Module 05 - Excavation.

4.6.4 Above Ground Cables

Above ground temporary cables shall be fixed in such a manner that they are clear of the work. Where possible they shall be installed clear of passageways, walkways and stairs.

Temporary overhead cables shall be PVC sheathed and shall incorporate galvanised steel wire armour or braid. The armour or braid shall be continuous and shall be earthed at the distribution board.

Temporary overhead cables crossing roads or access ways shall be installed at a minimum height of 3.0 metres above ground level. Flagged catenary wires, goal posts or similar shall be erected on either side of the cable at a height 500mm less than the cable, as a warning to persons driving mobile equipment. The clearance height shall be clearly indicated. The cables shall be properly supported by cable ladder, catenary wire or similar means.

Where temporary overhead cables cross passages, they shall be bound with yellow and black coloured tapes. Alternatively, flags may be attached to the cable.

All temporary overhead cables shall be installed at least 150mm clear of piped services such as steam, gas and water.

No apparatus or accessories other than lamp holders shall be suspended from temporary overhead cables.

4.6.5 Inspection and Testing of Temporary Installations

Temporary installations shall be Inspected and Tested prior to first energisation in accordance with Section 4.3. In addition Temporary installations shall be re-inspected at intervals not exceeding six months. The results of the re-inspection shall be recorded.

All equipment forming part of a temporary installation shall be inspected and tagged with an equipment inspection tag in accordance with Section 3.8 and Appendix 3.

4.7 Temporary Electrical Installations (Construction Sites)

Temporary electrical installations on construction sites shall be in accordance with the requirements of Section 4.6, and in addition shall comply with Section 604 of the IEE Wiring Regulations “Construction Site Installations”.

Switchboards and distribution boards used for temporary power distribution on construction sites shall be in accordance with BS 4363 “Distribution Assemblies for Electricity Supplies for Construction and Building Sites” and BS EN 60439-4 “Low Voltage Switchgear and Control gear Assemblies - Particular Requirements for Assemblies for Construction Sites”.

Electrical hook-up between the work boat/drilling tender and platform shall be carried out in accordance with the approval electrical installation drawings.

A typical distribution scheme in accordance with the requirements of BS 4363 is illustrated in Figure 3.



Figure 3 - Typical distribution Scheme for Temporary Power Supplies on Construction Sites

4.8 Certified Equipment for Hazardous Area

Selection of certified equipment for permanent or temporary installation in hazardous area shall be in accordance with the relevant BSP.12 documentation and DEPs.

Verification of the certified equipment installed in hazardous area zones shall be carried out against the latest Hazardous Area Certification (HAC) drawings to ensure conformance and HSE compliance. Any discrepancies found during the exercise shall be brought to the attention of the asset holder for rectification.

Non-certified equipment shall be removed from the hazardous area unless it is cover under the hot work permit procedure.



5 E A R T H I N G A N D B O N D I N G O F N O N -E L E C T R I C A L E Q U I P M E N T

5.1 General

Non-Electrical equipment may need to be connected to earth in order to ensure protection from lightning strike or to provide protection against dangerous discharges of static electricity.

5.2 Lightning Protection

A lightning strike to a steel object will act to raise the potential of the object to a level which may be dangerous to personnel. To avoid danger to personnel all large and prominent masses of steelwork shall be connected to earth.

Permanent installations such as buildings, vessels, and tanks will generally be protected against lightning strike as part of their design. Temporary or movable items such as scaffolding, mobile cranes and land drilling rigs should be connected to earth on each occasion they are installed or erected in a location vulnerable to lightning strike.

The earth connection should be achieved by bonding the object to earth with cable(s) clamped to the structure and having a minimum cross sectional area of 70 sqmm. The resistance to earth should be a maximum of 10 ohms and preferably less than 4 ohms. Scaffolding having direct contact with an earthed steel structure (eg clamped to the structure of an offshore platform) does not require any additional earth connection.

Earth electrodes used in lightning protection systems should be located away from areas likely to be occupied by personnel during lightning activity (eg entrances, exits, sheltered areas).

5.3 Static Electricity

Static electricity presents the danger of possible ignition of flammable gases by static discharge. The process involves three stages namely: generation of charge, accumulation of charge and discharge in the presence of a flammable mixture.

The generation and accumulation of static charge can result from a number of mechanisms including:

• Circulating liquids.

• Filling tanks.

• Passing liquid through an insulated metal pipe.

• Passing liquid through a non-conducting pipe.

• A person wearing insulating footware or standing on an insulating surface.

• A person wearing insulating clothing such as polyester.

A number of design features and operating procedures are generally provided to prevent either the generation or accumulation of static charge, or both. Typical features include; earthing of pipework and tanks, use of semi-conducting hoses for tanker loading, providing semi-conductive footware and avoiding the use of inappropriate clothing (eg polyester) within hazardous areas.

It is beyond the scope of this module to describe all the design and procedural requirements associated with ensuring that static charge does not present a danger within BSJVC facilities, however care should be taken to ensure that all connections bonding non-electrical equipment are in sound condition. It is imperative that all procedures for earthing of equipment, tanks, hoses, etc. are followed, and that requirements limiting clothing and footware types are strictly followed.



6 W O R K I N G N E A R O V E R H E A D L I N E S

6.1 General

Where work is to be carried out within 6m (horizontal distance) of an overhead line, the RPE shall be notified to determine whether the ESR should be applied.

6.2 Construction Near Overhead Lines (No Passage)

On construction sites where there will be no work or passage of plant under the overhead lines, ground level barriers shall be erected parallel to the overhead line and at least 6m away.

Where practicable, the minimum distance of the ground level barriers from the overhead lines shall be increased to one jib length plus 6 m.

6.3 Construction Near Overhead Lines (With Passage)

On construction sites where plant will pass under but not work under overhead lines,

Section 6.2 shall apply and defined passageways approximately 10m wide must be made in the barriers. Each passageway shall be fenced to define its route. The surface of the passageway must be level to minimise bouncing of crane jibs.

‘Goal posts’ constructed from rigid insulating material and distinctively marked shall be erected at each end of the passageway at a height no greater than 3 metres below the lowest point of the overhead line. The crossbar height will be reviewed and approved by the RPE prior to the commencement of work. Warning notices stating the crossbar clearance height shall be placed on both goal posts.

6.4 Construction Under Overhead Lines

On construction sites where work will be conducted beneath overhead lines, the following precautions must be taken in addition to those of sections 6.2 and 6.3.

Where the work is only at ground level (e.g., pipe laying), the safe clearance required beneath the overhead lines shall be advised by the RPE.

Equipment that could reach beyond the safe clearance limit shall not be taken under the line. Plant such as cranes and excavators shall be restricted, either by the addition of physical restraints so that it cannot reach beyond the safety clearance limit or by the erection of barriers. Such restraining arrangements shall be fully tested and inspected by a BSJVC Appointed Person before any modified plant is taken under the overhead line.



7 B I B L I O G R A P H Y The following legislation and standards apply to work conducted by and on behalf of BSJVC:

Legislation

Negara Brunei Darussalam Electrical Enactment 1972.

International Standards

BS 7671 Requirements for Electrical Installations (IEE Wiring Regulations)

BS EN 60309 Plugs, Socket Outlets and Couplers for Industrial Purposes

BS 3535 / EN 60742 Isolating Transformers and Safety Transformers

Part 1 : General Requirements

Part 2: Specification for transformers for reduced system voltage

BS 4363 - 1998 Distribution Assemblies for Reduced Low Voltage Electricity Supplies for Construction and Building Sites.

BS EN 60439 Low Voltage Switchgear and Control gear Assemblies

IEC 60745 Safety of Hand Held Motor Operated Electric Tools

BSP HSE Standard Modules

02 - Personal Protective Equipment

05 - Excavation

06 - Scaffolding and Access

07 - Confined Spaces

10 - Electrical Safety Rules

12 - Machinery and Tools

14 - Materials Handling

BSP-12 Documentation

BSP-12.S.401 Local Standard Practice for Electrical Engineering

BSP-12.S.402 Electrical Standard Drawings

BSP-12.S.403 Electrical Installation Practice

BSP-72 Documentation

BSP-72-PR-010-25 Procedures for the Repair And Overhaul of Electrical Equipment

Shell Group

HSE 006 Welding and Cutting

HSE 027 Electrical Safety

HSE 046 Static Electricity Technical and Safety Aspects

EP - 950000 SIEP HSE Manual

DEP 33.64.10.10 Electrical Engineering Guidelines



8 G L O S S A R Y O F T E R M S Approved Of a type or method authorised in writing by BSJVC.

Appointed Person An appointed Person is either a Competent Electrical Person, Authorised Electrical Person or a Senior Authorised Person permitted to carry out duties under the authority of the ESR.

Authorised Electrical Person An Authorised Electrical Person is an Appointed Person over 21 years of age and shall have clearly demonstrated that he has sufficient electrical technical knowledge, training and experience to carry out duties under the authority of the ESR.

BSJVC Brunei Shell Joint Venture Companies

BSP Brunei Shell Petroleum Company Sendirian Berhad

Class I Tool An electric tool in which protection against electric shock does not rely on basis insulation only, but which includes an additional safety precaution in such a way that means are provided for the connection of accessible conductive parts to the protective (earthing) conductor in the fixed wiring of the installation in such a way that accessible conductive parts cannot become live in the event of failure of the basic insulation. (Refer IEC 60745-1)

Class II Tool A tool in which protection against electric shock does not rely on basic insulation only, but in which additional safety precautions, such as double insulation or reinforced insulation, are provided, there being no provision for protective earthing or reliance upon installation conditions. (Refer IEC 60745-1)

Class III Tool A tool in which protection against electric shock relies on supply at safety extra low voltage (SELV) and in which voltages higher than those of SELV are not generated. (Refer IEC 960745-1)

Competent Electrical Person A Competent Electrical Person is an Appointed Person who has clearly demonstrated that he has sufficient knowledge, training and experience to avoid danger from live electrical equipment and to carry out duties under the authority of the ESR.

Contract Holder The Head of the Section within BSJVC which holds an agreement with a Contractor Company to perform work on behalf of BSJVC.

Contractor / Contractor Company

A company which holds a contract with BSJVC to perform work on behalf of BSJVC.

Electrical Equipment Inspection Plan

A Contractor Company’s plan for performing six-monthly inspections and tests on electrical equipment as required by BSJVC.

Electrical Safety Operational Procedure

A Procedure for controlling work on electrical equipment and systems with the objective of ensuring personal safety.

Electrical Safety Procedure A Procedure, instruction or requirement prepared to assist the implementation of the ESR.

ESR HSE Standard Module 10 - Electrical Safety Rules.

Extra Low Voltage A voltage normally not exceeding 50 Vac or 120 Vdc ripple free, whether between conductors or to earth.

High Voltage A voltage exceeding 1000 Vac or 1500 Vdc.

IEC International Electrotechnical Commission.

Low Voltage A voltage normally exceeding Extra Low Voltage but not exceeding 1000 Vac or 1500 Vdc between conductors, or 600 Vac or 900 Vdc between conductors and earth.

Qualified Electrical Person A person qualified to work on electrical systems and equipment. Refer to Section 2.1.

Responsible Person Electrical The Responsible Person Electrical is a Senior Authorised Electrical Person, or Authorised Electrical Person who is responsible for the electrical safety and the control of work and testing/fault finding within a defined or specified geographical area or facility. Refer also to the ESR.

Restrictive Conductive Location

A location comprised mainly of metallic or conductive surrounding parts, within which it is likely that a person will come into contact through a substantial portion of his body with the conductive surrounding parts, and where the possibility of preventing this contact is limited. Inside a steel storage tank or vessel is considered to be a Restrictive Conductive Location.



Safety Extra Low Voltage (SELV)

An Extra-Low Voltage system which is electrically separated from earth and from other systems in such a way that a single fault cannot give rise to the risk of electric shock.

Temporary Electrical Installation

A temporary electrical installation is any interconnection of generators, switchboards, or distribution boards, installed for duration of maximum one year.

Worksite Supervisor An appointed Person who is in charge of a working party.



9 A P P E N D I C E S

9.1 Appendix 1 - Boundry Conditions



9.2 Appendix 2 - Power Supplies and Applications

Location

Item

Class

Voltage

Phase

Special Provisions Domestic Office Commercial Industrial

Construction Site

Restrictive Conductive Location

Hand lamp III 25V 1 Safety isolating transformer Yes Yes Yes

III 50V 1 Safety isolating transformer Yes Yes Yes

II 110V 1 Safety isolating transformer Yes Yes No

I 240(254)V 1 30 mA RCB protection Yes Note 1 No

Hand held power tool



II 110V 1 Double wound transformer; secondary centre point earthed

Yes Yes Yes

II 240(254)V 1 30 mA RCB protection Yes Note 1 No

Fixed power tool II or I 110V 1 Double wound transformer; secondary centre point earthed

Yes Yes Yes

II or I 240(254)V 1 30 mA RCB protection Yes Note 1 No

moving power tool II or I 110V 1 Double wound transformer; secondary centre point earthed

Yes Yes Yes

II or I 240(254)V 1 30 mA RCB protection Yes Note 1 No

Mobile lighting 110V 1 Double wound transformer; secondary centre point earthed

Yes Yes Yes

240(254)V 1 30 mA RCB protection Yes Note 1 No

Fixed lighting 110V 1 Double wound transformer; secondary centre point earthed

Yes Yes Yes

240(254)V 1 30 mA RCB protection Yes Yes No

Small mobile equipment up to 3.75 kW

110V 3 Double wound transformer; secondary centre point earthed

Yes Yes No


Small fix equipment up to 3.75 kW

110V 3 Double wound transformer; secondary centre point earthed

Yes Yes No


Mobile equipment > 3.75 kW 415(440)V 3 100 mA RCB protection Yes Yes No

Fixed equipment > 3.75 kW 415(440)V 3 100 mA RCB protection Yes Yes No

Battery powered tools

Yes Yes Yes

Note that operational controls may need to be in place before the introduction of any electrically operated equipment into an area where flammable substances may be present.

Note 1: Acceptable when connected to a permanent electrical distribution system.



9.3 Appendix 3 - Inspection and Test Identification System for Tools and Equipment

The system to be applied for the identification of tools and equipment following inspection and testing, and to be used in the event of tools or equipment being found to be defective or past due date for inspection, is described below. The system is equivalent to the system described in Appendix 1 of HSE Standard Module 12 - Machinery and Tools.

Portable Electrical Tools

Portable electrical tools which have been inspected and tested and are safe to use shall be identified with a silver adhesive label, a sample of which is shown below.

INSPECTION DATE LAST: NEXT:

The label will be stuck to the portable electrical tool in a prominent position such as the main body without obscuring the manufacturer’s plate or blocking ventilation/exhaust air slots.

Portable electrical tools which are found to be defective or fail their tests and cannot quickly be repaired will be identified with an adhesive label, a sample of which is shown below.

The “DEFECTIVE - DO NOT USE” label will be stuck on top of the silver inspection label so that only the red and white prohibition label is visible.

Mobile Electrical Equipment

The “Multitag” system shall be used to give immediate visual indication of the condition of mobile plant.

The system components are shown on the following page and comprise:

A holder which is attached to the item of equipment by wire or tie wrap and displays a red and white prohibitory message.

An insert for the holder, one side of which is green and yellow with boxes in which to enter the tag reference number, date of inspection and initials of inspector, the other side yellow and black and carrying a warning message.

Equipment which has been inspected and tested and is safe to use will show the green and yellow side of the insert and will contain the reference/date/initials information.

DEFECTIVE DO NOT USE



Equipment which is found to be defective or unsafe, either during periodic inspection or during worksite operation, will have its “Multitag” insert removed to display the prohibition of use message. Note, although a tag may be removed by anyone at the worksite discovering defective equipment, a worker would normally report the defect to a Worksite Supervisor who would pull the tag.

After repair, the suitably updated insert may be replaced only by an Authorised Electrical Person or by a Qualified Electrical Person at least equivalent to an Electrical Foreman.



9.4 Appendix 4 - Inspection and Testing of Electrical Installations

The following list of inspection and test requirements is based on the IEE Wiring Regulations (BS 7671) and represents the minimum requirements for inspection and testing of electrical installations. This list is provided for guidance only and in no way supersedes any Company procedures or check lists such as may be provided for specific installations or projects. For clarification of the inspection and test requirements refer to the IEE Wiring Regulations.

A INSPECTION

1 Check that all equipment within the installation is in accordance with the required standards and have been properly installed and inspected

2 Check for visible signs of damage to equipment and cables

3 Check all connections of conductors

4 Check that all conductors are properly identified

5 Check routing and mechanical protection of conductors

6 Confirm current carrying capacity of conductors

7 Check correct installation for single pole switches (active conductor)

8 Check correct connection of socket outlets and lampholders

9 Check that live components are protected against direct contact

10 Check that all equipment is properly earthed

11 Check that appropriate isolating and switching devices are provided

12 Check that undervoltage protective devices are provided (where appropriate)

13 Check that protection devices are provided and properly set

14 Check that circuits, fuses, switches, and terminals are properly labelled

15 Check that adequate access to equipment is provided

16 Check that danger notices are provided where appropriate

17 Check that circuit diagrams are provided where appropriate

B TESTING

1 Check the continuity of protective (earth) conductors

2 Check the continuity of final circuit conductors

3 Check insulation resistance

4 Check polarity and/or phase rotation

5 Check earth fault loop impedance (only when required to ensure correct operation of rotective devices)

6 Check earth electrode resistance

7 Check operation of circuit protection devices including Residual Current Devices



9.5 Appendix 5 - Minimum Values of Insulation Resistance

The following recommended minimum values for Insulation Resistance are according to the IEE Wiring Regulations (BS 7671).

Nominal Voltage Test Voltage Minimum Insulation Resistance

Extra Low Voltage Circuits supplied from a Safety Isolating Transformer

250 Vdc 0.25 megohms

0 - 500 V (accept as above) 500 Vdc 0.5 megohms

500 - 1000 V 1000 Vdc 1.0 megohms

Between SELV and associated LV circuits 500 Vdc 5.0 megohms



9.6 Appendix 6 - Treatment Of Electric Shock

IMMEDIATE AND SPEEDY ACTION IS VITAL

9.6.1 Free From Contact

1 Switch off the current immediately or send someone to do so.

2 Do not attempt to remove a person from contact with high voltage conductors unless suitable tools, insulated for the system voltage, are used.

3 When attempting to free a person from contact with low voltage conductors use electric rubber gloves, rubber boots, rubber mat, or insulated stick, but if these are not available use a loop of rope, cap or coat to drag the person free. Whatever is used must be dry and non-conducting.

4 After release, do not waste time. If possible, lay casualty on a firm dry surface. If there is no sign of breathing, immediately begin resuscitation as follows.

9.6.2 Mouth-to-Mouth/Mouth-to Nose Ventilation

1 Remove and debris from the mouth which may cause obstruction of the airway by opening the mouth, hooking tow fingers and sweeping around the mouth cavity.

2 Open the airway by placing two fingers under the point of the casualty’s chin and lifting the jaw. At the same time, place the other hand on the casualty’s forehead, and tilt the head well back. If you suspect head or neck injuries, handle the head carefully, tilting into only just far enough to open the airway. (See Diagram 1)

3 Look for breathing. Put your face close to the casualty’s mouth and look, listen and feel for breathing. Look for chest movements, listen for sounds of breathing and feel for breath on your cheek. Look, listen, and feel for 5 seconds before deciding that breathing is absent. (See Diagram 2)

4 Give mouth to mouth ventilation. Close the casualty’s nose by pinching it with your index finger and thumb. Take a full breath and place your lips around his mouth, making a good sea. Blowing the casualty’s mouth until you see the chest rise. Take about two seconds for full inflation. (See Diagram 3)

5 Check the carotid pulse. Feel for the Adam’s apple with two fingers. Slide your fingers back towards you into the gap between the Adam’s apple and the strap muscle, and feel for the carotid pulse. Feel for five seconds.

6 If a pulse is present, continue giving mouth-to mouth ventilation at a rate of approximately 10 times a minute, until breathing recommences.

7 If you cannot make a seal around the casualty’s mouth, use the mouth-to-nose method. Close the casualty’s mouth with the thumb of your hand, holding the lower jaw. Take a deep breath, seal your limps around the casualty’s nose, and blow.

9.6.3 Cardio Pulmonary Resuscitation (CPR)

If pulse is absent, perform Cardio Pulmonary Resuscitation (CPR) as follows. (See Diagram 5)

1 Strike the chest once, smartly, with the edge of the hand, on the center of the breastbone.

2 Find one of the casualty’s lowest ribs using your index and middle fingers. Slide your fingers upwards to the point in the middle where the rib margins meet at the breastbone.

3 Place the heel of your other hand on the breastbone, and slide it down until it reaches your index finger. This is the point where you will apply pressure.

4 Place the heel of your first hand on top of the other hand, and interlock the fingers.

5 Leaning well over the casualty, with your arms straight, press down vertically on the breastbone to depress it approximately 4-5cm (1 - 2 inc.). Then release the pressure without removing your hands. Repeat the compression, aiming for a rate of approximately 80 compressions per minute.

6 Every 15 compressions, give 2 inflations. Stop to check for the return of the pulse and breathing after every 4 cycles, after approximately one minute. continue giving CPR if pulse and breathing are absent.



7 Where there are two persons present, one should undertake 5 chest compressions at a rate of 80 times per minute while the other undertakes 1 lung inflation. Stop to check for the return of a pulse and breathing after every 12 cycles, after approximately one minute. Continue giving CPR if pulse and breathing are absent.

8 Call an ambulance.

9.6.4 Control Bleeding

1 Apply firm pressure directly to the wound.

2 Cover the wound with a clean dressing. Bandage the dressing firmly in place.

3 If bleeding continues, add further dressings on top of the first and increase the pressure by bandaging firmly in place.

4 If possible, elevate the bleeding point (e.g. arm or leg).

9.6.5 Treatment of Burns

1 Burns should be cooled with cold water, if available, for 10 minutes or more then covered with a dressing. Ideally, dressings should be clean and sterile, non-fluffy, and wet.



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bsp-02-standard-1630 - general electrical safety (mod 13, rev. 4.0)

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