Low Voltage Electrical Installations on MOD Property

Practitioner Guide 03/09 Estate Management

Document Aim: The aim of this Practitioner Guide (PG) is principally to provide supplementary guidance on BS 7671:2008 the 17th Edition of the IEE Wiring Regulations to those involved in the planning, design, installation and maintenance of fixed low voltage (LV) electrical installations on the Ministry of Defence (MOD) property by expounding on specific requirements of the Regulations in the context of MOD compliance. Document Synopsis:

This PG provides supplementary guidance for those engaged in the planning, design, installation and maintenance of fixed LV electrical installations. BS 7671:2008 introduces several major changes. Those changes that may affect the types of installations found within the MOD boundary are highlighted in this guidance with the appropriate Regulation (or Regulation Group) number for ease of reference. The "Practitioners" to whom this Guide relates are Defence Estates (DE) personnel and other individuals or organisations who, on behalf of DE, have responsibility for planning, designing, installing or maintaining LV electrical installations on the MOD estate. Throughout the document it is emphasised that the electrical installation shall comply with all relevant statutory and MOD mandatory regulations. This is not to be construed as implying that existing installations shall be retrospectively made to comply with the latest regulations. As long as existing installations continue to give satisfactory service they do not need to be brought up to current standards until major refurbishment is planned, when it will be prudent to do so. This PG will be will be of limited use for those DE managed overseas estates where local regulations will continue to be applied. It is hoped that this PG will help to ensure consistency of approach in the planning, design and the installation of LV electrical equipment on the MOD estate where UK regulations prevail.

Property Directorate

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Document Information

Property Directorate Sponsor: Simon Adamson

Date of Issue: 24 Sep 09

Contact if different from above Sponsor: Hom Limbu Senior Electrical Engineer Construction Support Team, Defence Estates, Kingston Road, Sutton Coldfield B75 7RL 94421 3221 / 0121 311 3221

Who should read this: Property Managers, Establishment Works Consultants, Works Services Managers, Private Finance Initiative Contractors, Regional Prime Contractors, Stand Alone Prime Contractors, Specialist Principal Support Providers, DE Specialist Term Consultants and Site Estates Authority Teams

When it takes effect: Immediately When it is due to expire: 24 Sep 10

Equality And Diversity Impact Assessment This policy has been Equality and Diversity Impact Assessed in accordance with the Department’s Equality and Diversity Impact Assessment Tool against: Part 1 Assessment Only (no diversity impact found).

Document Control Distribution Document Name: Version No: Version Date: Author: Reviewed By: Review Date: Version Control Date Issued Version Author Reason for Change Related Documents JSP 375 MOD H&S Handbook Volume 3 DE Specification 034 Electrical Installations JSP 482 MOD Explosive Regulations PG 04/09 Inspection & Testing ESTC Standard No 6 Part 1 - Electrical

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CONTENTS

ParagraphDocument Aim Document Synopsis Document Information Document Control Abbreviations Introduction 1.0 Aim 1.1 Scope 1.2 Existing Installations 1.3

Standards and Compliance 2.0 General 2.1 Statutory Regulations 2.2 Status of BS 7671 2.3 Safety Requirements 3.0 MOD Safety Rules and Procedures 3.1 Safety Procedures where MOD SRPs Do Not Apply 3.2 Tools and equipment 3.3 Application of the Guide Elsewhere 4.0 USVF Bases 4.1 Overseas Estates 4.2 Deployed Operating Bases 4.3 Competence of Electricians and Contractors in the UK 5.0 Electricians 5.1 Contractors 5.2 Approved Self-Certification Bodies 5.3 MOD Policy 5.4 Planning and Design 6.0 Fundamental Requirements 6.1 Addition, Modification or Alteration to an Existing Installation 6.2 Circuit Arrangements 6.3 Selection of Switchgear and Protective Devices 6.4 Cascading Protection 6.5 Design of Circuits for Socket-outlets 7.0 Supervision of Installations 7.1 Skilled person 7.2 Instructed Person 7.3 Ordinary Person 7.4 Additional Protection of Cables Concealed in a Wall or Partition 7.5 Additional Protection of Socket-outlets 7.6 Design of Socket-outlet Circuits 7.7 Socket-outlets for Domestic Installations 7.8 Socket-outlets for Non-Domestic Installations 7.9 Energy Efficiency 8.0 Motors 8.1 Lighting 8.2 Hazardous Areas 9.0

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Applicable Standards 9.1 Explosive Storage and Processing Facilities 9.2 Fuel Storage and dispensing Facilities 9.3

• Aviation Bulk Fuel Installations (BFI) 9.3.1 • Mechanical Transport Fuel Installations (MTFI) 9.3.2 • Other BFIs 9.3.3

Liquefied Petroleum Gas Installations 9.4 Paint Spray Facilities 9.5 Dangerous Goods Stores 9.6 Paint Stores 9.7 Other Hazardous Installations 9.8 Hazardous Zones 9.9 Competency of Skilled Person for Hazardous Areas Working 9.10 Earthing 10.0 Earthing in Petroleum Installations 10.1 Existing Petroleum Installations 10.2 References 10.3 Earth Electrodes (Regulation Group 542.2) 10.4 Earth fault Loop Impedance (Regulation Group 612.9) 10.5 Bonding 11.0 Equipotential Bonding 11.1 Conducting Locations with Restricted Movement 11.2 Bonding of Metallic Scaffolding 11.3 Lightning Protection 12.0 Communications Information Systems (CIS) Installations 13.0 JSP 480 13.1 Further References 13.2 Demarcation of Maintenance Responsibility 13.3 Earthing Requirements for Socket Out Final Circuits Supplying High Earth Leakage Equipment

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“Clean Earth” Installations 13.5 Aeronautical Ground Lighting (AGL) 14.0 Publications 14.1 Technical Authority 14.2 Luminaires and Lighting Installations (Section 559) 15.0 Special Locations 16.0 Exhibitions, Shows and Stands (Section 711) 16.1 Mobile or Transportable Units (Section 717) 16.2 Fairgrounds, Amusement Parks and Circuses (Section 740) 16.3 Maintainablility 17.0 Documentation 18.0 Requirement 18.1 Certification 18.2 Handover Documents 18.3 Annexes Annex A – Definition of Statutory and Mandatory Compliance A1 Annex B – Definitions B1 Annex C – Further References C1

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Abbreviations A Amperes ADS Automatic Disconnection of Supply AE Authorising Engineer AGL Aeronautical Ground Lighting AP Air Publication AP(E) Authorised Person (Electrical) APEA Association for Petroleum and Explosives Administration BFI Bulk Fuel Installation BRE Building Research Establishment BS EN British Standards European Norm BS 7671 BS7671:2008 Requirements for Electrical Installations (IEE Wiring Regulations) CIBSE Chartered Institute of Building Services Engineers CCP Common Core Platform CDM Construction (Design and Management) Regulations 2007 CEstOs Customer Estate Organisations CIS Communications Information Systems CO Commanding Officer CP Competent Person DE Defence Estates DEPM Defence Estates Project Manager DII Defence Information Infrastructure DNO Distribution Network Operator EAWR Electricity at Work Regulations 1989 ELV Extra-low Voltage ESC Electricity Safety Council ESTC Explosives Storage and Transport Committee ESQCR Electricity Safety, Quality and Continuity Regulations 2002 GLS General Lighting Scheme GN Guidance Note HoE Head of Establishment HSE Health and Safety Executive HVAC Heating Ventilation and Air-conditioning IEC International Electrotechnical Commission JIB Joint Industry Board JSP Joint Service Publication IP Institute of Petroleum LEMP Lightning Electromagnetic Impulse LPS Lightning Protection System mA Milli-amperes MET Main Earthing Terminal MMO Maintenance Management Organisation MOD Ministry of Defence

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MTFI Motor Transport Fuelling Installation NVQ National Vocational Qualification PELV Protective Extra-low Voltage PG Practitioner Guide PM Project Manager PME Protective Multiple Earthing RCD Residual Current Device SELV Safety Extra-low Voltage SKP Skilled Person SMPS Switched-mode Power Supplies SON Statement of Need SOR Statement of Requirement SRP MOD Safety Rules and Procedures (JSP 375 Volume 3) SVQ Scottish Vocational Qualification V Volts W Watts

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1.0 INTRODUCTION

1.1 Aim The aim of this PG is to provide supplementary guidance on the Regulations (BS 7671:2008 the 17th Edition of the IEE Wiring Regulations) to those involved in the planning, design, installation and maintenance of fixed LV electrical installations on the MOD property by expounding on specific requirements of the Regulations in the context of MOD compliance. The guide highlights issues that need to be considered when planning new installations or during major refurbishment works. Additionally, it highlights some of the important changes made in BS 7671:2008 which should act as useful reminders for designers of electrical installations. 1.2 Scope The scope of this PG is restricted to those aspects of fixed LV electrical installations commonly found on the MOD estate. Specialised installations, such as Aeronautical Ground Lighting (AGL) and Lightning Protection Systems (LPS), are mentioned but not discussed in detail. For such topics appropriate advice should be obtained from specialists in the relevant fields. For electrical installations in hazardous locations attention is primarily drawn to the standards which need to be referred to by the designer of the installation. This PG is to be regarded as supplementary to the current edition of BS 7671 and the latter shall always take precedence if information given herein conflicts with the requirements of the latest edition of the Regulations and its associated guidance notes. 1.3 Existing Installations Throughout the document it is emphasised that the electrical installation shall comply with all relevant statutory and MOD mandatory regulations. This is not to be construed as implying that existing installations shall be retrospectively made to comply with the latest regulations. As long as existing installations continue to give satisfactory service they do not need to be brought up to current standards until major refurbishment is planned, when it will be prudent to do so. 2.0 STANDARDS AND COMPLIANCE 2.1 General Due to the diverse nature of MOD’s business activities a wide range of LV electrical installations will be found throughout its sites. Every installation will not only need to be carefully planned, designed and installed in compliance with the relevant regulations but it must also fully support the operational needs of the end-user. For this reason, as well as meeting the requirements of the extant edition of BS 7671 the design of the installation must also take into account the mandatory requirements of MOD Regulations, such as the relevant Joint Services Publications (JSP) and Defence Information Notices (DIN) etc, as well as user specific requirements. DE accepted definitions of Statutory and Mandatory compliance is at Annex A.

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2.2 Statutory Regulations The following statutory regulations apply to electrical work:

• Health and Safety at Work Act etc 1974. • The Electricity at Work Regulations 1989 (EAWR) as amended. • The Electricity Safety, Quality and Continuity Regulations 2002 (ESQCR) as

amended. • The Building Regulations. • The Construction (Design and Management) Regulations 2007 (CDM).

2.3 Status of BS 7671 Although BS 7671 itself is non-statutory, under the ESQCR failure to comply with the regulations places the Distribution Network Operator (DNO) in the position of not being compelled to supply, or continue to supply, electrical energy to the installation1. Moreover, Regulation 21 of the ESQCR states that compliance with BS 7671 is mandatory for all consumers’ installations operating a switched alternative supply to a distributor’s network at LV, such as; photovoltaic’s, generators and uninterrupted power supplies etc. Compliance with BS 7671 will also make it more likely that the design elements of CDM will be complied with and compliance with the regulations may be used in the court of law as evidence of compliance with a statutory requirement. For instance; installations which conform to the standards laid down in BS7671 are regarded by the Health and Safety Executive (HSE) as likely to achieve conformity with the relevant parts of the EAWR. “Regulations” and BS 7671 are used interchangeably throughout this PG. Unless otherwise stated, where reference is made in this document to a Chapter [number], Section [number] or Regulation [number] these refer to the same in BS 7671:2008, Requirements for Electrical Installations, IEE Wiring Regulations 17th Edition issued in January 2008. 3.0 SAFETY REQUIREMENTS

3.1 MOD Safety Rules and Procedures All electrical work undertaken on MOD premises must be carried out in a manner that will ensure the safety of both the person(s) carrying out the work and that of others. Generally, live working cannot be justified on the MOD estate and should not normally be permitted. For further guidance on live and dead working see HSR252.

All visiting workers and contractors on MOD sites are to comply with the site-wide 4Cs3 arrangements as detailed in JSP 375 Volume 2 Leaflet 34. Contractors’ risk assessments and method statements are to be approved by the Maintenance Management Organisation (MMO)4 prior to work starting. Except where specifically excluded by contract the MOD Safety Rules and Procedures (SRPs) as detailed in JSP 375, Volume 3, shall be complied with.

1 Regulation 25 of the ESQCR 2002 2 EAWR Memorandum of Guidance on the Electricity at Work Regulations 1989. 3 4C stands for Co-ordination, Cooperation, Communication and Control. See MOD Health and Safety handbook JSP 375, Volume 2, Leaflet 34 – The Management of Visiting Workers and Contractors. 4 The generic term MMO has been used to represent the contractor providing maintenance services under all delivery methods, e.g. PPP / PFI / RPC / MAC etc.

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3.2 Safety Procedures where MOD SRPs Do Not Apply Where contractual arrangements are such that MOD SRPs do not apply and there are no contractual safety rules and procedures in place the following should be apply:

• At LV5 the safe isolation procedures for low voltage installations given in the Electrical Safety Council (ESC) Best Practice Guide6 should be followed as a minimum. The guide can be downloaded via the link below:

http://www.esc.org.uk/pdfs//business-and-community/electrical-industry/BPG2_08.pdf

• At High Voltage7 no operation of plant or equipment or work or test on such plant

or equipment shall be undertaken until such time as a safe system of work is in place that sets a standard of safety at least equivalent to JSP 375, Volume 3, Chapter 3.

3.3 Tools and Equipment Test procedures, equipment and connections shall comply with the requirements of HSE Guidance note GS388. Tools shall be suitable for the task in hand and the user must check them for serviceability before, during and after use. The MOD cannot stipulate acceptable standards for these tools, which should be selected, used and maintained by individual operatives in accordance with their employers’ standard operating/working procedures. Where specialist tools are provided by the MOD the user should assure themselves of the serviceability of those tools with the issuing authority before use. 4.0 APPLICATION OF THE GUIDE ELSEWHERE

4.1 USVF Bases The guidelines given in this PG is applicable to the full range of LV electrical installations found on MOD Establishments occupied by the United States Visiting Forces (USVF). Both in terms of quality and safety the standard of electrical work undertaken on USVF sites should not be, in any respect, inferior to those executed on the UK MOD sites. 4.2 Overseas Estates On the DE managed overseas estates design of the electrical installations, selection of contractors and the appointment of skilled persons should comply with local regulations unless specifically required by the Secretary of State for Defence to comply with UK regulations. UK standards are normally enforced on overseas estates only when local regulations are not at least as stringent as UK standards, for example on the remote overseas estates. Where JSP 375 Volume 3 applies the skilled person is appointed accordingly. 5 Exceeding 50 V a.c. or 120 V ripple-free d.c., whether between conductors or to Earth but not exceeding 1000 V a.c. or 1500 V d.c. between conductors, or 600 V a.c. or 900 V between conductors and Earth. 6 ESC Best Practice Guide Number 2. 7 Normally exceeding low voltage. 8 HSE GS38 (revised) Electrical test equipment for use by electricians.

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The estates occupied by British Forces (Germany) (BF(G)) apply their own local (German) regulations. The competency of the contractor is established prior to contract let and local procedures apply to the selection and appointment of the competent person. For this reason, while the general principles mentioned in this PG may be applicable, the document will be of limited use to BF(G) staff. 4.3 Deployed Operating Bases Where operational conditions permit the application of peacetime regulations the guidance given in this PG is to be followed on semi-permanent and permanent deployed operating bases so far as reasonably practicable. The guide is not applicable for installations designed and executed by the Royal Engineers in an operational theatre designated as a Military Works Area9. 5.0 COMPETENCE OF ELECTRICIANS AND CONTRACTORS IN THE UK 5.1 Electricians The industry recognised qualification for operatives carrying out electrical installation work is the NVQ level 3 in Electrotechnical Services (Installations – Building and Structures) with suitable underpinning knowledge, the Practical Performance Assessment test (Achievement Measurement 2 or AM2) may also have been taken. These qualifications meet the requirements for the issue of an Electrotechnical Certification Scheme (ECS) card issued by the Joint Industry Board (JIB). The ECS card provides evidence of an operatives qualifications, demonstration of their Health and Safety awareness, allows access to major construction sites and is a photo identification of the card holder. If the operative is to carry out inspection and testing of electrical installations then they are expected to hold a testing qualification (either City & Guilds 2391 – Inspection, Testing and Certification or the EMTA Awards Limited (EAL) – Diploma in Inspection and Testing Electrotechnical Systems and Equipment). It is also strongly recommended that the operative has an up to date qualification on BS 7671:2008 (from either the awarding bodies City & Guilds or EAL). 5.2 Contractors The following organisations register electrical contractors within the UK. The Electrical Contractors’ Association (ECA), for England, Wales and Northern Ireland, and SELECT, for Scotland, are the industry trade associations owned and run by their members. Members have met the requirements of the industry recognised technical assessment, have proved themselves as businesses of good standing and have their work covered by a warrantee. The NICEIC is a certification body. Electrical contractors on their roll have met the requirements of the industry recognised technical assessment. In England, Wales and Northern Ireland there are a number of government approved Part P competent persons schemes that register businesses that carry out work in dwellings in scope to the Building Regulations. Contractors who are on a competent scheme register have been assessed by the scheme to have met minimum technical competences and are

9 Infrastructure Management on Joint Operations: Joint Warfare Publication 4-05.

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authorised to self-certify to building control that their work meets the requirements of Part P of the Building Regulations. The government approved competent persons schemes in England and Wales are:

• ELECSA • The NICEIC • NAPIT • BSI • BRE

5.3 Approved Self-Certification Registration Bodies Table 1, which is not exhaustive, lists the electrotechnical organisations mentioned above.

Business

Contact Website

British Standards Institution (BSI) Phone: 01442 278 577 www.kitemarktoday.com ELECSA Ltd Phone: 0870 749 0080 www.elecsa.org.uk Electrical Contractors’ Association (ECA) Phone: 0207 3123 4800 www.eca.co.uk Joint Industry Board (JIB) Phone: 020 8302 0031 www.jib.org.uk NICEIC Group Ltd Phone: 0870 013 0382 www.niceic.com NAPIT Registration Ltd Phone: 0870 444 1392 www.napit.org.uk SELECT Phone: 0131 445 5577 www.select.org.uk

Table 1: Approved Self-Certification Registration Bodies. 5.4 MOD Policy Within the MOD boundary there is no requirement for an individual or business to be registered with one of these schemes to undertake any electrical work. There is also no requirement to comply with Part P of the Building Regulations for electrical work to MOD dwellings within the boundary of an MOD establishment. Outside the boundary of MOD establishment, where the work is commissioned by or on behalf of the MOD, the requirements of Part P will apply to MOD dwellings. However, in any situation the competent person must be approved by the MMO as having the necessary experience and competence to undertake such work. Where JSP 375 is applicable the MMO is required to appoint him/her as a Skilled Person10 in accordance with JSP 375 Volume 3 Chapter 3. Where JSP 375 does not apply local procedures are to be applied. It is recommended that the persons carrying out electrical installation work hold an appropriate ECS card issued by the JIB in the UK or an equivalent qualification elsewhere. 6.0 PLANNING AND DESIGN

6.1 Fundamental Requirements In terms of safety and quality all new electrical installations should comply with the requirements of the current edition of BS 7671. However, for operational/functional requirements the end-user should provide the detail in the form a Statement of Requirement/Need, which should then be developed by the designer in consultation with the end-user to arrive at the most cost-effective solution while still meeting the minimum military

10 Here the definition if the Skilled Person has different meaning from that given in BS 7671.

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requirement. For Prime Contracting the operational/functional requirements are often detailed in the Strategic Brief. The MOD requires both statutory and mandatory11 requirements to be satisfied. Mandatory documents are normally mentioned in the Strategic Brief/User Requirements Document/Statement of Requirement (or Need) and the contract specifications and the designer should obtain them through the designated MOD Authority representative or DE Project Manager (DE PM) as appropriate. A clear understanding of the end-user requirements by the designer is crucial and references should also be made to the appropriate MOD Regulations very early on. The proposed solution should be discussed and agreed with the relevant stakeholders throughout until the design is finalised, so that the end product is fit for purpose first time round, without costly modifications having to be made to the installation at a later date. 6.2 Addition, Modification or Alteration to an Existing Installation Prior to any addition, modification or alteration to an existing installation whether temporary or permanent the requirements of BS 7671 Regulation 131.8 shall be met. Designers must as a minimum:

• Confirm that the existing infrastructure is suitable for any increased load. • That the level of protection and protection grading will not be compromised. • That the existing infrastructure is suitable for any increase in fault level that may

arise. This confirmation must take place as part of the design process and not after installation. This will necessitate the review of protection settings and fault levels. Without the above verification it is not possible to establish as a minimum compliance with the EAWR, Regulation 5; Strength and capability of electrical equipment which states: “No electrical equipment shall be put into use where its strength and capability may be exceeded in such a way as may give rise to danger”. 6.3 Circuit Arrangements The requirements of Regulations 521.8.1 and 521.8.2 are reproduced in Table 2 for ease of reference for designers and installers of electrical installations.

Requirement

Regulation Remark

Each part of a circuit shall be arranged such that the conductors are not distributed over different multicore cables, conduits, ducting systems, trunking systems or tray or ladder systems. This requirement need not be met where a number of multicore cables forming one circuit are installed in parallel.

521.8.1 The conductors of a circuit must not be distributed over different multicore cables, conduits, ducting, trunking or ladder systems. However, where multicore cables are run in parallel, forming one circuit, this requirement need not be met. If multicore cables are installed in parallel, then each cable must contain one conductor of each line

The line and neutral conductors of each final 521.8.2 This is to prevent the indirect 11 For definitions of Statutory and Mandatory Compliance refer to D/DE/DGOps/6.1.3/4/1/1 EC OOC 12/08 (Final dated 24 Oct 08 – Coherency Study Implementation – Customer Statement of Requirement and Prioritisation (A paper by DG Ops) – See Annex C.

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circuit shall be electrically separate from those of every other final circuit.

energising of a final circuit intended to be isolated (see Regulation Group 314)

Table 2: Requirements for Circuit Arrangements.

6.4 Selection of Switchgear and Protective Devices When LV switchgear, distribution boards and overcurrent protective devices are being selected installation designers should be cognisant of the requirements of MOD Safety Rules and Procedures detailed in JSP 375 Volume 3 Chapter 3 and HSE guidance. Individual items should be lockable in the off position for isolation purpose. Existing equipment that is not lockable in the off position should be planned for replacement whenever the opportunity arises. The use of lockable equipment will permit safe working practices without undue operational limitations being imposed on unaffected circuits whilst working on adjacent circuits. 6.5 Cascading Protection Cascading (or back-up) protection is the coordination of two or more protective devices to disconnect a fault. The principle of cascading permits designers and installers to use a device with a lower prospective fault current capability which may prove to be more cost effective. BS 7671:2008 recognises this and states in Regulation 434.5.1: A lower breaking capacity is permitted if another protective device or devices having the necessary rated short-circuit breaking capacity is installed on the supply side. In this situation, the characteristics of the devices shall be co-ordinated so that the energy let-through of these devices does not exceed that which can be withstood, without damage, by the device(s) on the load side. It is necessary to check that the supply side (upstream) device has the current limiting capabilities to protect the load side (downstream) device. The energy let through by the first device must be less than the withstand capability of the downstream (backed up) device. Manufacturers determine these levels of back-up by testing and they should always be consulted or the discrimination curves supplied by them used to ensure that proper cascading is achieved. 7.0 DESIGN OF CIRCUITS FOR SOCKET-OUTLETS 7.1 Supervision of Installations BS 7671:2008 introduces the concept of Skilled Person, Instructed Person and Ordinary Person in connection with access to and use of electrical installations. When a new installation is being planned problems may arise in determining which one of these individuals will supervise the installation once it has been commissioned. This information is crucial because installations under the supervision of an ordinary or non-instructed person need to be designed with this in mind. Similarly, socket-outlets accessible to ordinary or non-instructed persons, and not under the supervision of skilled or instructed person, require to be protected by a 30 mA Residual Current Device (RCD).

Domestic installations are clear cut - they always fall under ordinary person - but certain facilities/buildings in technical or commercial settings are not so easily defined.

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The intent of the remainder of this section is to assist in this decision making process by expanding on the definitions of skilled, instructed and ordinary persons as given in BS 7671:2008. Examples are provided for further aid understanding. 7.2 Skilled Person. A person with technical knowledge or sufficient experience to enable them to avoid dangers which electricity may create. A skilled person may be defined for a particular item of electrical equipment or an electrical systems and the definition does not imply that such a person is able to work on every type of equipment or system. The person must be competent by way of training and qualifications and/or experience to recognise different electrical hazards and know their own limitations and seek advice when necessary. A skilled person could be an experienced electrician who is familiar with the particular electrical equipment or electrical systems that he is expected to work on or an Authorised Person (Electrical) appointed for the particular system. 7.3 Instructed Person. A person adequately advised or supervised by a skilled person to enable them to avoid dangers which electricity may create. An instructed person can be anyone who has had suitable instruction or has a skilled person to supervise him/her when working on or near electrical equipment or electrical systems, in order to avoid the dangers associated with electricity. The definition is not limited to a trainee or apprentice but can extend to an experienced electrician who is undergoing training on an unfamiliar piece of electrical equipment or electrical systems. The degree of supervision required is dependent on the degree of risk associated with the task. For a low risk task simple verbal instructions may be adequate whereas for a high risk complex task written procedures and more overt oversight may be necessary to prevent danger or injury12. An Instructed Person could be a facilities manager, a Dutyholder or office manager who has been given sufficient instructions to avoid dangers from electricity in relation to a particular installation. Another example is a person formally appointed by the Head of Establishment (HoE), or his appointed representative, to report normal wear and tear of the electrical installation from within the user group, who has been given the responsibility of ensuring that the installation is not abused, and only regularly inspected and tested portable electrical appliance is used on the premises. 7.4 Ordinary Person. A person who is neither a skilled person nor an instructed person. An ordinary person is an individual who has neither the technical knowledge nor experience to necessarily avoid the dangers associated with electricity. An ordinary person would be a member of the general public. It should be noted that the installation in a dwelling is not deemed to be under the supervision of a skilled person or instructed person even if the current inhabitant is one of these because it cannot be guaranteed that in the future the occupant will not be replaced by an ordinary person. Electrical installations in Service Family Accommodations (SFAs) and Single Living Accommodations (SLAs) are always deemed to be for the use of an ordinary person. 7.5 Additional Protection of Cables Concealed in a Wall or Partition Regulations 522.6.6 – 522.6.8 require that where the installation is not intended to be under the supervision of a Skilled or Instructed Person:

• Cables concealed in a wall or partition at a depth of less than 50 mm from the surface from a wall or partition must be protected by a 30 mA RCD13 where other

12 Regulation 16 of the Electricity at Work Regulations 1989. 13 The RCD must have a rated residual operating current of 30 mA and an operating time not exceeding 40 ms at a residual current of 5In.

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methods of protection, including the use of an earthed metallic covering, earthed conduit/trunking or mechanical protection, cannot be employed.

• Irrespective of depth, a cable in a partition where the construction includes metallic parts other than the fixings shall be protected by a 30 mA RCD.

7.6 Additional Protection of Socket-outlets Regulation 411.3.3 requires, in ac systems, additional protection by means of a 30mA RCD to be provided for:

• Socket-outlets with a rated current not exceeding 20A that are for use by ordinary persons and that are included for general use.

• Socket-outlets for mobile equipment with a current rating not exceeding 32A for use outdoors.

An exception is permitted for:

• Socket-outlet is provided for a particular item of equipment, and is suitably labelled or otherwise identified, or

• Its use is under the supervision of Skilled or Instructed Person. It is deemed that the Client or its authorised representative, such as DE Project Manager (DEPM)/MOD Site Estate Authority Team (SEAT)/M&E Infrastructure/Utility Manager or M&E Estate Strategy Team/Facilities Manager etc, is best placed to advise the designer on the likely use of the Socket-outlets in consultation with end-users. The designer is to design the circuit based on this advice and the information on which the final decision is based on whether to include RCD protection or otherwise is to be inserted in the Building/Asset file. When future change of use of the facility is proposed this information is to be reviewed. As a general principle, it may be considered that socket-outlets in the following circumstances would require additional protection by means of a 30 mA RCD:

• All socket-outlets in a dwelling - both domestic and single living accommodations. • Socket-outlets in Mess accommodation and common/public rooms. • Socket-outlets at airport lounges for use by a member of the public. • Socket-outlets in a non-domestic environment for use by cleaners. • Socket-outlets in self-catering areas. • Socket-outlets in kitchens, utility areas, wash rooms and similar areas.

7.7 Design of Socket-outlet Circuits The design of radial and ring circuits is to make provision of socket-outlets in sufficient numbers to negate the use of multiple adaptors and extension leads. The number of socket-outlets indicated in JSP 31514 will often be found to be inadequate to cater for the upsurge of electronic/information technology equipment that play such vital role in our business and leisure activities in today’s world. 7.8 Socket-outlets for Domestic Installations With the exception of Scotland; for domestic installations in the UK there are no statutory requirements regarding minimum number of socket-outlets to be provided. In Scotland the Technical Standards for compliance with Building Standards (Scotland) Regulations 1990 Part Q requires the following minimum number of sockets-outlets: 14 Services Accommodation Code Volume 1.

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• Kitchen - 6 • Each apartment - 4 • Elsewhere - 4

For the rest of the UK, the Electrical Safety Council (ESC) recommends the following minimum number of twin socket-outlets in a dwelling:

• Lounge - 6 to 10 • Dining Room - 3 • Kitchen - 6 to 10 • Double Bedroom - 4 to 6 • Single Bedroom - 4 to 6 • Bed-sit - 4 • Hall - 2 • Stairs/landing - 1 • Loft - 1 • Study/Home office - 6 • Garage - 2 • Utility - 2

7.9 Socket-outlets for Non-Domestic Installations Sufficient numbers of socket-outlets are to be provided, which may well exceed the quantity given in JSP 315. This is to be agreed in advance with relevant stakeholders before the design is undertaken. It is recommended that, where practicable, no more than one radial/ring circuit should be installed in a room. Where technical or cost constraints prevent such practice being adopted the distribution board and the individual socket-outlet(s) must be clearly labelled to indicate where the isolation points are located for those sockets. It is normally acceptable to have each socket-outlet indelibly marked with the fuse/MCB way and its unique serial number. For added safety it may be prudent to confine each circuit to a particular section of the wall in a facility having a large floor area. These measures will design out the possibility of isolation points being misunderstood by operatives during future maintenance work. 8.0 ENERGY EFFICIENCY

8.1 Motors

On the 11th March 2009 the EU voted in a new directive in relation to the energy efficiency of ac electric motors covering - single speed 3 phase 50/60 Hz squirrel cage motors with rated voltages < 1000v within the power range 0.75kW to 375kW with 2 / 4 / 6 poles and rated for continuous duty operation, with the effect that: • From 16thJune 2011 all motors shall meet efficiency level IE2 (minimum). • From 1stJanuary 2015 all motors rated 7.5kW to 375kW shall either meet efficiency level

IE3 or be supplied as IE2 and be equipped with variable speed drive. • From 1stJanuary 2017 all motors rated 0.75kW to 375kW shall either meet efficiency

level IE3 or meet IE2 and be equipped with variable speed drive.

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8.2 Lighting Electrical installation design shall comply with requirements of Building Regulations Part L – Conservation of Fuel and Power. In the UK, it is estimated that lighting consumes 20% of the generated electrical energy. Luminaires and lighting system and associated controls should be selected with energy efficiency in mind. The planned timetable of voluntary phasing out of inefficient light bulbs in the UK15 is shown in Table 3 and should be noted when selecting luminaires as they may become unsuitable for use with energy efficient lamps that they will be replaced with in the future.

Year

Action Applicable to

2008 Cease replacing stock of all inefficient GLS A-shaped incandescent lamps of energy rating higher than 100W

Predominantly 150W lamps

2008- 2009

Cease selling all inefficient GLS A-shaped lamps of energy rating higher than 60W

Predominantly 150W lamps, 100W lamps, plus some 75W lamps

2010 Cease selling all GLS A-shaped lamps of efficacy of energy rating higher than 40W

Predominantly 60W lamps

2010 Cease selling all remaining inefficient GLS A-shaped lamps and 60W "candle" and "golf ball" lamps

Predominantly 40W and 25W A-shaped GLS bulbs, and 60W candles and golf ball lamps

Table 3: Planned UK Voluntary Phasing Out of Inefficient Light Bulbs.

The EU time table for phasing out inefficient lamps, luminaires and ballasts as of October 2008 is given in Table 4, 5 and 6.

Table 4: Lighting Minimum Efficacy EU Schedule.

15 Energy Saving Trust: Indicative Sustainable Product Performance Standards for: A guide to the Phase out of Inefficient Light Bulbs.

EU Regulation DIM 1: Minimum efficacy requirement/banning Non-clear NDLS Clear NDLS

Date

Energy class Requirement GLS HAL CFL LED

Energy class Requirement ≥100W ≥75W ≥60W ≥7W F&G

HAL LED

01/09/09 A C for ≥950lm E for rest

01/09/10 A C for ≥725lm E for rest

01/09/11 A C for ≥450lm E for rest

01/09/12 A C for ≥60lm E for rest

01/09/13 Increased performance and quality requirements 01/09/14 Review 01/09/16 A B1 Incandescent lamps with S14, S15 or S19 caps shall be exempted from the efficacy requirements of Stages 1 to 4 but not from Stages 5 and 6. Starting 01.09.2009 following information required for sales of special purpose lamps (on packaging and in all product information accompanying the lamp when it is placed on the market and to be included in technical documentation file drawn up for conformity assessment): their intended purpose; that they are not suitable for household room illumination. ¹ except for clear lamps with G9 or R7s cap : EEL C NDLS: non directional light source. HAL: halogen CFL: compact fluorescent lamp. GLS: tungsten filament incandescent lamp. LED: light emitting diode. F&G: Flame and Globe. Colour code; red banned, amber not most energy efficient but not banned at time of writing or until indicated, green most energy efficient.

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EU regulation: Measures: overview Lamps Minimum efficacy requirements for CE mark → banning less efficient lamps Lamps Due Date Halophosphate fluorescent lamps → banned 2010 T12 fluorescent lamps * 2012 High Pressure Sodium- HPS/Metal Halide MH lamps (screw base only) → low quality MH E27/E40 banned (no HQL/HCL affected) → HPS standard/low quality E27/E40 banned (NAV Standard E27/E40)

2012

regulation review by the EU commission 2014 High Pressure mercury lamps HPM (HQL) → banned 2015 High pressure Sodium-Plug-in/retrofit → banned** (HPM replacement) 2015 H lamps (E27/E40 only) with bad performance → banned 2017

Table 5: Lamps EU Schedule.

EU regulation: Measures: Ballasts and Luminaires Efficacy and design requirements for CE mark → ballasts and luminaires Ballasts and Luminaires Due Date Ballasts for FL: minimum efficacy → class A1-B1 permitted 2010 Ballasts for FL: energy label/stand-by power maximum 1W 2010 FL-und HID-luminaires: product performance information has to be available 2011 Ballasts for FL: Stand-by power maximum 0.5W 2012 Ballasts for HID lamps: energy label required 2012 FL and HID luminaires* compatible for ECG class A1 and A2 2012 Regulation review by the EU commission 2014 Only ECG** class A1 and A2 permitted (conventional CG banned) 2017 * Exception for IP4X luminaires. ECG** Electronic Control Gear * Banning by minimum efficacy ** Plug in lamps have to fulfil Super/HPS level → nearly all plug in lamps are banned

Table 6: Ballasts and Luminaires EU Schedule.

Above tables courtesy of Siemens Automation and Drives and OSRAM limited 8.3 Energy Efficient Lamp and Luminaire Selection The Building Regulations Part L mandates the use of mostly high-efficacy lamps and appropriate lighting controls. However, since there is limited value in fitting an efficient lamp in an inefficient luminaire, the latter should be selected with a high light output ratio (ie > 0.5) unless the light distribution required dictates otherwise. Where discharge lamps are used modern electronic control gear that operate at high frequency (and efficiency) are to be selected. Old inefficient lamps, luminaires and control gear should be replaced with their modern efficient equivalents whenever major refurbishment schemes are planned or at the end of their useful life. 8.4 Lighting Controls The Building Research Establishment (BRE) estimates that effective lighting controls can save 30-40% of the building’s lighting energy use. Guidance on meeting the requirements for lighting controls in new and existing buildings other than dwellings is given in BRE Digest 498. 8.5 Further Information Further guidance and information can be obtained from the following organisations/publications:

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• Energy Saving Trust (website: www.est.org.uk) CE61 Energy Efficient Lighting – Guidance for Installers and Specifiers (2006 Edition).

• CIBSE Guidance Note (GN) 4 - Lighting Requirements of Building Regulations Part L.

• Department of the Environment Transport and Regions Good Practice Guide 272. Lighting for People, Energy Efficiency and Architecture – an overview of lighting requirements and design.

• BRE Digest 498: Selecting Lighting Controls, BRE, 2006 9.0 HAZARDOUS LOCATIONS 9.1 Applicable Standards Whilst electrical installations in hazardous locations are in scope of BS 7671 the Regulations are supplemented by the requirements or recommendations of other British Standards, MOD Regulations or by the person ordering the work. Installation work in hazardous areas shall only be undertaken by suitably qualified and experienced personnel. The electrical installation shall be designed and installed in accordance with the requirements detailed in the following standards as appropriate: 9.2 Explosive Storage and Processing Facilities

• Joint Services Publication 482 MOD Explosive Regulations Volume 1 and 2 (as amended).

• ESTC Standard No. 6 (as amended) Requirements for the Commissioning, Inspection

• Testing and Maintenance of Works for Explosive Facilities Part 1 – Electrical. • Policy Instruction 61/2004 Explosives Storage and Processing Facilities –

Compliance with Mandated MOD Policy and UK Legislation. • The Manufacture and Storage of Explosive Regulations (MSER) 2005 &

Approved Code of Practice (ACOP) 139. • BS EN 60079-10 Classification of Hazardous Area for Combustible Gases. • BS EN 60079-17:2003 Part 17: Inspection and Maintenance of Electrical

Installations in Hazardous Areas (other than mines). • BS EN 61241-10 Classification of Hazardous Area for Combustible Dust. • In addition to the above requirements DOSG approval is required for appliances

and equipment proposed to be installed in explosive facilities. 9.3 Fuel Storage and Dispensing Facilities

9.3.1 Aviation Bulk Fuel Installations (BFI):

• JSP 317 Storage & Handling of Fuels & Lubricants (4th Edition). • DE Functional Standard 07 FS07 Inspection, Maintenance & Testing of

Equipment Installed at Petroleum Installations. • BS EN 60079-14:2003 Electrical Apparatus for Explosive Gas Atmospheres –

Part 14: Electrical Installations in Hazardous Areas (other than mines). • BS EN 60079-17:2003 Part 17: Inspection and Maintenance of Electrical

Installations in Hazardous Areas (other than mines). • Dangerous Substances and Explosive Atmospheres Regulations (DSEAR)2002 &

ACOP 133, 134, 135, 136, 137 & 138. • Association for Petroleum and Explosives Administration (APEA)/Institute of

Petroleum (IP) 1540.

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9.3.2 Mechanical Transport Fuel Installations (MTFI):

• JSP 317. • Petroleum (Consolidation) Act 1928. • DSEAR 2002 & ACOP 133, 134, 135, 136, 137 & 138. • BS EN 60079-10. • BS EN 60079-17. • APEA/IP Design, Construction, Modification, Maintenance and decommissioning

of Filling Stations 2nd Edition, March 2005 ((which replaced HS(G) 41)).

9.3.3 Other BFIs:

• JSP 317. • DE Functional Standard 07. • DSEAR 2002 & ACOP 134, 135, 136, 137 & 138. • BS EN 60079-10. • BS EN 60079-17.

9.4 Liquefied Petroleum Gas Installations

• JSP 319 Storage & Handling of Liquefied Petroleum Gas (LPG). • DSEAR 2002 & ACOP 134, 135, 136, 137 & 138. • BS EN 60079-10. • BS EN 60079-17.

9.5 Paint Spray Facilities

• DSEAR 2002 & ACOP 134, 135, 136, 137 & 138. • BS EN 60079-10. • BS EN 60079-17. • BS EN 61241-10.

9.6 Dangerous Goods Stores

• JSP 317. • DSEAR 2002 & ACOP 134, 135, 136, 137 & 138. • BS EN 60079-10. • BS EN 60079-17. • BS EN 61241-10. • BS EN 61241-17.

9.7 Paint Stores

• JSP 317. • Design & Maintenance Guide 03 Storage of Dangerous Substance. • DSEAR 2002 & ACOP 134, 135, 136, 137 & 138. • BS EN 60079-10. • BS EN 60079-17. • BS EN 61241-10. • BS EN 61241-17.

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9.8 Other Hazardous Installations Additionally, there will other hazardous areas found on MOD estates, such as Motor Transport (MT) servicing pits, MT Fuel Bowser servicing areas, GRP repair facilities, Rotor Blade repair facilities, battery charging facilities etc. The design, installation and maintenance of electrical installations in these areas are required to comply with the relevant MOD and DSEAR Regulations as well as the appropriate parts of BS EN 60079 and BS EN 61241. 9.9 Hazardous Zones Electrical equipment must be suitable for use in the appropriate hazardous area as determined through zonal classification. Selection and erection of electrical equipment must comply with BS EN 60079-14. 9.10 Competency of Skilled Person for Hazardous Areas Working The skilled person must be suitably qualified in accordance with the requirements of BS EN 60079 and BS EN 61421. The selection process must take into consideration the training received by the skilled person who must be able to demonstrate that the individual is conversant with the type of installation he/she will be working on. Formal evidence of relevant experience held and training received by the skilled person is required. This is no different to the requirements of JSP 375 Volume 3 Chapter 3. 10.0 EARTHING 10.1 Earthing in Petroleum Installations As diverted neutral currents passing through metalwork located in potentially hazardous areas may pose an increased risk of fire and explosion Protective Multiple Earthing (PME) system is not to be used to supply MTFI and BF). This should apply even when the MOD is deemed to be the DNO under the ESQCR. Instead earthing should be derived using one of the following methods:

• A TT system with earthing arrangements exclusive to the MTFI/BFI. • A dedicated TN-S system where earthing arrangements are exclusive to the MTFI/BFI. • Through a transformer exclusive to the MTFI / BFI, providing a local TN-S system

with its own earth electrode arrangement, independent of the supply network earthing.

• Use of an isolation transformer to derive a separated neutral and earth system from a public supply.

10.2 Existing Petroleum Installations Where a PME system is already in use there is no requirement to retrospectively comply with this section. However, in such instances annual inspection and testing together with close monitoring of the value of the diverted neutral current will be necessary. 10.3 References Further information is provided in the following standards:

• APEA/IP Design, Construction, Modification, Maintenance and decommissioning of Filling Stations 2nd Edition, March 2005 ((which replaced HS(G) 41)).

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• JSP 317 Joint Service Safety Regulations for the Storage and handling of Fuels and Lubricants.

• BS 7430:1998 Code of Practice for Earthing. • Institute of Petroleum Electrical Safety Code Model Code of Safe Practice Part 1.

10.4 Earth Electrodes (Regulation Group 542.2) Regulation Group 542.2 details the type of earth electrodes that may be used. It is worth noting that Regulation 542.2.4 prohibits the use of metallic pipe for gases or flammable liquids to be used as an earth electrode. The metallic pipe of a water utility shall also not be used as earth electrode because of the use of non-conducting materials by Water Supply Undertakings for new installations and for replacement purposes. Other metallic water supply pipe-work can be used provided that the Dutyholder for the electrical installation can ensure that the integrity of the earthing is maintained (see also BS 7430).

10.5 Earth Fault Loop Impedance (Regulation 612.9) In BS 7671:2008, the maximum earth loop impedance values (Zs) have been adjusted for U0 = 230 V, whereas in the 16th Edition Zs values were based on U0 = 240 V. The result of this change is that Zs values in the 17th Edition are correspondingly less than those in the previous edition. Tables 41.2 – 41.5 give maximum values of Zs as follows:

• 41.2: Fuses, for 0.4 second • 41.3: Circuit-breakers • 41.4: Fuse, for 5 seconds • 41.5: RCDs

If the supply voltage is reduced, say through the introduction of an energy limiter into the circuit for voltage optimisation, then Zs must be recalculated for the new nominal voltage (U0) and the new limits compared to the values measured for the installation to ensure that over-current protective devices and RCDs operate within specified time limits.

Note that without the above verification it is not possible to establish compliance with the EAWR, regulation 5; Strength and capability of electrical equipment which states; No electrical equipment shall be put into use where its strength and capability may be exceeded in such a way as may give rise to danger. 11.0 BONDING 11.1 Equipotential Bonding Free standing metal tables/workbenches found in commercial type kitchens do not introduce a potential (normally earth potential) into the equipotential zone from outside, and as such are not regarded as extraneous-conductive-parts. These items therefore do not require supplementary bonding. Similarly, metal cages which are not supported by building structural metal-work and to which no electrical services are connected and/or where electrical equipment is not likely to be used within arms reach do not require bonding. It should also be noted that there is no requirement to install supplementary bonding in kitchens. 11.2 Conducting Locations with Restricted Movement Conducting Locations with Restricted Movement are locations comprised mainly of metallic or other conductive parts against which the body comes into contact with due to physical

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constraints of the location, for example interior of a large boiler, a metal storage tank or large diameter metal pipe. For such locations:

• Regulation 706.410.3.5, Item (iii)(a) requires where the protective measure is automatic disconnection of supply16 the supply to fixed equipment shall incorporate supplementary equipotential bonding to connect exposed-conductive parts of fixed equipment and the conductive parts of the location.

• Regulation 706.410.3.5, Item (iii)(e) requires that where the protective measure is PELV17, equipotential bonding is provided between all exposed-conductive-parts, all extraneous-conductive-parts inside the conducting location, and the connection of the PELV system to Earth.

11.3 Bonding of Metallic Scaffolding Situations where bonding is NOT required:

• No electrical services are present or no electrical equipment is used. • Battery powered equipment (not connected to wiring system) only is used. • Equipment protected against electric shock by a reduced low voltage system

only is used. • Equipment protected against electric shock by double (Class II) or reinforced

insulation only is used. • Equipment protected against electric shock by Separated Extra-low voltage.

Bonding is required where equipment having fault protection by the protective measure Automatic Disconnection of Supply (ADS) is used. This applies regardless of whether the scaffolding is inside or outside a building. The bonding is to be main protective bonding connected to the main earthing terminal (MET) of the installation supplying the ADS protected equipment used on or near the scaffolding except where the building is supplied via a PME system (TN-C-S). The following additional requirements should be noted:

• Where the building is supplied via a PME system; any scaffolding on a construction site or otherwise external to a building, shall be earthed via a suitable earth electrode and all earthing requirements of BS7671 shall be met and it shall also be connected to the building LPS earth where applicable. .

• Bonding should be carried out using insulated copper conductor, selected in

accordance with Chapter 54 and routed to avoid damage.

• Where extensive scaffolding structures are to be bonded, connections should be made at points no more than 20 m apart horizontally18.

• Bonding to the LPS is required if the adjacent structure has an external LPS.

In addition, if the adjacent structure does not have an LPS, a risk assessment shall be carried out to assess the risk of the scaffolding being struck by lightning and in event of such a risk being identified then the scaffolding shall be provided with a LPS commensurate with the risk identified. It is recommended that expert advice is obtained with regard to the conductor and

16 For requirements under other forms of protective measures refer to Section 706 of BS 7671:2008. 17 Protective extra-low voltage – an extra-low voltage system which is not electrically separated from Earth, but which otherwise satisfies all the safety requirements for safety extra-low voltage. 18 BS 7430:1998 Code of Practice for Earthing.

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connections due to the complexity of the requirements of BS EN 62305-3 (see section on LPS below).

12.0 LIGHTNING PROTECTION BS 7671 does not apply to LPS for buildings and structures covered by BS EN 62305. In August 2008, BS 6651:1999 Code of Practice for protection of structures against lightning was withdrawn and replaced by the BS EN 62305 series of Standards on Protection Against Lightning. This new series of standards treat lightning protection in a much more in-depth and detailed manner and consists of four distinct parts:

• Part 1: General Principles BS EN 62305-1 – introduces other parts of the standard and describes how to design a LPS in compliance with the standard.

• Part 2: Risk Management BS EN 62305-2 – risk management approach to

risk of loss of human life, loss of service to public, loss of cultural heritage and economic loss.

• Part 3: Physical Damage to Structures and Life Hazard BS EN 62305-3 –

relates directly to the major part of BS 6651 but this new part has four Classes of protection levels of LPS as opposed to two levels (ordinary and high risk) levels in BS 6651.

• Part 4: Electrical and Electronic Systems within Structures – covers the

protection of electrical and electronic systems housed within structures. This part embodies the principles outlined in Annex C of BS 6651 but introduces a new zonal approach referred to as Lightning Protection Zones and provides further information for the design, installation, maintenance and testing of a Lightning Electromagnetic Impulse (LEMP) protection system for electrical/electronic systems within a structure.

It is expected that, with the exception of the simplest installation, LPS design and installation will be carried out by experts in the field whose advice should be sought at the planning stage. 13.0 COMMUNICATIONS INFORMATION SYSTEMS (CIS) INSTALLATIONS 13.1 JSP 480 When CIS installation is being planned JSP 48019 is to be consulted. The JSP details the procedures for obtaining design approval from the Site Coordinating Installation Design Authority (SCIDA) who must also approve the contractor nominated to undertake the installation work. 13.2 Further References The following standards are relevant to the design of cabling systems for information technology equipment:

• EN 50098 series for customer premises cabling for information technology (IT)

19 Defence Coordinating Installation Authority Manual of Regulations for the Installation of Communications Information Systems.

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• BS EN 50173 series for generic cabling for IT • EN 50174 series for cabling installations for IT • EN 50310 for application of equipotential bonding and earthing for IT • EN 50346 for testing of installed cabling for IT

13.3 Demarcation of Maintenance Responsibility Where CIS installations are required to be maintained by more than one organisation clear demarcation of responsibilities for the installation should be established so that safe electrical isolation can be assured across the boundaries of responsibility. This might become necessary, for example, in a Common Core Platform (CCP) or Defence Information Infrastructure (DII) installations where the MMO may be responsible for lighting, small power and air-conditioning plant but not the UPS and cabinets/racks holding the CIS equipment. Where JSP 375 Volume 3 is being applied by the site MMO the AE Electrical for the facility must be consulted for the establishment of the points of demarcation. 13.4 Earthing Requirements for Socket-outlet Final Circuits Supplying High Earth

Leakage Equipment Modern communication and information systems equipment has by design current flowing in the protective conductor during normal use as a result of their switched-mode power supplies (SMPS). Ring and radial socket-outlet final circuits supplying two or more items of equipment with cumulative protective conductor current exceeding 10 mA during normal service must be provided with high integrity protective conductor connections complying with the requirements of Regulations 543.7.2.1. All new installations intended for such use are to be designed and installed accordingly. In light of the fact that electronic equipment incorporating SMPS are widely found in the modern home consideration should also be given to installing high integrity earthing to socket-outlet final circuits found in SFAs or SLAs. Where two or more items of equipment with cumulative protective conductor current exceeding 10 mA are required to be used within an existing facility with “conventional” ring or radial circuit, the circuit should be modified where possible rather than replaced. The existing circuit can be modified by installing 13 Amp socket-outlet face plates with dual earth terminals complying with Regulation 543.7.1.4 and at the distribution board, separating the protective conductor ring and terminating the ends in separate terminals so that each conductor is securely held. Radials circuits are to comply with Regulation 543.7.2.1. However, while some electronic equipment will have significant earth leakage others will have negligible amounts, so it is important to establish if high integrity earthing is required in the first instance. For socket-outlet final circuits supplying multiple equipment with combined protective conductor current of less than 10 mA, high integrity earthing is not required. 13.5 “Clean Earth” Installations A “clean earth” may be defined as a low impedance earth point with little or no possibility of conducted noise, either already present or likely to be created, when bonded to a circuit. This usually requires a separate earthing system which is totally isolated from the power earthing and lightning protection system, although separate earthing network with a common earth electrode system (MET) may also be used. It should be noted that BS IEC 61000-5-2:199720 does not recommend that a separate clean earth system is used unless it has been found satisfactory for specific installations when correctly applied and the topology maintained by competent specialists. This is because in case of power system faults or

20 BS IEC 61000-5-2:1997 Electromagnetic Compatibility (EMC) – Part 5: Installation and Mitigation Guidelines Section 2: Earthing and cabling.

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lightning strikes dangerous transient voltages may occur between this isolated earthing system and other parts of the installation, exposing personnel to dangers of electric shock and electric and electronic apparatus to electromagnetic interference. Because of these risks the preferred solution where a clean earth is required is a separate earthing network with a common earth electrode system (MET) Where this recommendation conflicts with the end-user requirement the designer of the separate earthing network with separate earth electrode will have to prove that the network does not give rise to the risks outlined above. 14.0 AERONAUTICAL GROUND LIGHTING (AGL) 14.1 Publications The following references should be consulted during the planning, design, installation and maintenance of AGL systems:

• Practitioner’s Guide PG 01/2008 – Management of Visual Aids at Military Aerodromes.

• JSP 554 – Military Aviation Aerodrome Standards and Criteria. • Policy Instructions PI 29/2005 – Installation, Commissioning and Maintenance of

Aeronautical Ground Lighting Cable Circuits. 14.2 Technical Authority The DE Technical Authority on AGL is:

Mr Andrew Dunn Head Safety Systems Construction Support Team Sutton Coldfield, B75 7RL T: 0121 311 3622; Mil: 94421 3622; Direct Dialling: 0121 311 3622 e-mail: andrew.dunn@de.mod.uk

15.0 LUMINAIRES AND LIGHTING INSTALLATIONS (Section 559) Section 559 is completely new section for BS 7671:2008 and applies to the selection and erection of luminaires and lighting installations, covering the following areas:

• Fixed installations. • Highway power supplies. • Street furniture.

Particular requirements are given for:

• Fixed outdoor lighting installations, which include: • Lighting installations for roads, car parks, parks, gardens, sporting areas, places

open to the public, illumination of monuments and floodlighting.

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• Lighting arrangements in telephone kiosk, bus shelters, advertising panels, and town plans.

• Road signs and traffic signal systems. • Extra-low voltage (ELV) lighting installations. • Lighting for display stands.

The requirements do not apply to:

• High voltage signs. • Luminous discharge tube installations. • High voltage signs supplied at low voltage. • Outdoor lighting installations exclude temporary festoon lighting and DNOs’

equipment. Table 7 summarises only those regulations that are not common to other installations:

Requirement

Regulation Remark

Track lighting shall comply with BS EN 60570 559.4.4 Heat from lamps on surrounding materials shall be considered

559.5.1 Including materials in the path of spotlight beams

Maximum lighting circuit size of 16 A for ES and BC lamp holders

559.6.1.6 B15, B22,E14, E27 & E40 lamp holders

Outer screw of ES lamp holder must connect to neutral (except for E14 & E27 to BS 60238)

559.6.1.8 Also applicable to track mounted system

Through wiring only permitted if luminaire designed for it

559.6.2.1

For luminaire with temperature rating marked, cable suitable for the marked temperature shall be used

559.6.2.2

3-phase lighting circuits with common neutral shall have linked circuit breaker

559.6.2.3

Stroboscopic effects to be considered in areas with rotating machinery

559.9 Distribute lighting load over all three phases or use suitable lamp control gear e.g. high frequency control gear

Non-conducting location and earth-free equipotential bonding not to be used

559.10.2

SELV transformers to be to BS EN 61558-2-6 559.11.3.1 Only required where SELV is used as Protective Measure

ELV electronic convertor to be to BS EN 61347-2-2

559.11.3.2 Only required where SELV is used as Protective Measure

SELV bare live conductor systems shall comply with BS EN 60598-2-23 or be protected by a fail-safe device which shall monitor and disconnect within 0.3 seconds

559.11.4.1 & 559.11.4.2

ELV flexes minimum 1.0 mm2 max length 3 m 559.11.5.2 ELV flexes minimum 4.0 mm2 for luminaires suspended by the flex

559.11.5.2

Lighting installations in places such as telephone kiosks, bus shelters, town plans etc should be additionally protected by a 30 mA RCD

559.10.3.2 Recommendation

Highway street furniture access door to be accessible only with key or tool or be 2.5 m above ground level

559.10.3.1

Highway street furniture adjacent metal do not require bonding

559.10.3.1

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Requirement

Regulation Remark

Highway street furniture may use fuse carrier as isolator

559.10.6.1 For use by instructed persons only

Highway street furniture disconnection time is 5 seconds

559.10.3.3

Table 7: Requirements for Lighting and Luminaires.

16.0 SPECIAL LOCATIONS

16.1 Exhibitions, Shows and Stands (Section 711) Section 711 provides information relating to the additional requirements in relation to temporary electrical installations in exhibitions, shows and stands. On the MOD estates these types of installations are not dissimilar in nature to those found in temporary structures put up for Mess functions and public Open Days. Typical of the types of installations covered by Section 711 are:

• Exhibitions • Trade fairs • Outdoor shows • Temporary entertainment venues • Kiosks • Outdoor fast food outlets

The requirements do not apply to:

• Fixed building electrical installations • Electrical systems defined in BS 7909 used in structures, sets, mobile units etc • Exhibits for which requirements are given in the relevant standards, unless

specifically stated The risks associated with these installations are increased risk of electric shock and fire due to:

• Temporary nature of the installation • Lack of permanent structures • Sever mechanical stresses • Access to the general public

Because of the risks outlined above such installations are specified as Special Installations or Locations and additional measures are required. The main requirements are summarised in Table 8.

Requirement

Regulation Remark

Protective measures against electric shock:

• Supply cable to be protected at its origin by an RCD with maximum residual operating current 300 mA

711.410.3.4 RCD with time delay to discriminate with final circuit RCDs

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Requirement

Regulation Remark

• All accessible metallic structural parts are to be main bonded

711.411.3.1.2

• Additional protection is required for all final circuits and socket-outlets up to 32A by 30 mA RCD

711.411.3.3 Other than emergency lighting circuits

• TN-C-S shall not be used 711.411.4 Protection against thermal effects:

• Particular attention should be given to the choice of lighting equipment and locations for installation. The construction material of showcases and signs should have adequate heat resistance, mechanical strength and electrical insulation. Because of the concentration of heat that may be present adequate ventilation will also be required.

711.422.4.2 Regulation Group 711.559 provides more specific information relating to luminaires and lighting installations

Selection and erection of equipment:

• Switchgear and control gear shall not be accessible to the general public and must be enclosed in lockable cabinets or similar.

711.51

• Every separate temporary structure intended to be occupied by one specific user and each distribution circuit supplying outdoor installations must be provided with its own readily accessible and identifiable means of isolation.

711.537.2.3

• Adequate number of socket-outlets and plugs to be installed. Floor mounted socket-outlets to be suitable for the environment and withstand traffic load.

711.55.7

Inspection and testing: • Temporary installation shall be inspected

and tested after each assembly on site 711.6 In accordance with

Chapter 61

Table 8: Requirements for Exhibitions, Shows and Stands. 16.2 Mobile or Transportable Units (Section 717) This is a new Section for BS 7671:2008 falling under Part 7 Special Installations or Locations, which was not included in the 16th Edition of the IEE wiring Regulations, although GN 7 Special Locations did provide some information. In Section 717 the term “unit” is intended to mean a vehicle and/or mobile or transportable structure in which all or part of an electrical installation is contained, which is provided with a temporary supply by means of a plug and socket. As far as the MOD is concerned this section would apply to portable cabins used for office and domestic accommodation as well as other service equipment housed in portable containers. This section would equally apply to containers modified to be used as accommodation on deployed operations. These units will be typically of two types:

• Mobile (vehicles, self-propelled or towed) • Transportable (containers or cabins)

Examples of such units include:

• Outside broadcast units used by the broadcast industry

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• Medical services such as blood donor or mobile breast screening units • Advertising trucks and “road show” vehicles • Fire fighting appliances • Mobile workshops • Modular office buildings • Construction site huts • Transportable catering units • Fast food vans

The following are not in scope:

• Transportable generating sets • Marinas • Pleasure craft • Mobile machinery • Caravans and other leisure accommodation

Risks associated with mobile or transportable units are:

• The temporary nature of the installation • Repeated connection of the units and possible effect on connections and cables • Different connection facilities and earthing arrangements nationwide and with

local DNOs • Difficulties establishing an equipotential zone external to the unit • Open-circuit faults of the PEN conductor of PME supplies • Vibration problems due to trailer or vehicular movement

The main requirements are summarised In Table 9.

Requirement

Regulation Remark

Automatic disconnection shall be by an RCD 717.411.1 Socket-outlets to be 30 mA protected 717.415 Unless they are SELV,

PELV or by electrical separation

Accessible metal parts like chassis shall be main bonded, using finely stranded conductors

717.411.3.1.2 Cable types H05V-K & H07V-K to BS 6004

TN-C-S (PME) shall not be used 717.411.4 Permitted if installation under continuous supervision of skilled or instructed person

Unit supply cables to be flexible to BS 7919 or equivalent, minimum 2.5 mm2 and shall enter the unit via an insulating sleeve or enclosure

717.52.1

Unit supply connector to be BS EN 60309-2, protected to IP44

717.55.1 Plug part to be situated on the unit

Electrical equipment not to be run in gas storage area except ELV equipment for gas-supply control

717.528.3.5

Unit to have an electrical rating plate, indicating earthing arrangement, voltage, phases and maximum power

717.514 Fixed to unit adjacent to inlet connector

Obstacles and Out of Reach protective measures are not permitted

717.417

Non-conducting location is not permitted and earth free local equipotential bonding is not recommended

717.418

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Requirement

Regulation Remark

Alternatively, an IT supply can be used, with insulation monitoring, and RCD to disconnect if the isolating transformer fails

717.411.6.2

Table 9: Requirements for Mobile or Transportable Units. 16.3 Fairgrounds, Amusement Parks and Circuses (Section 740) This is a new Section for BS 7671:2008 falling under Part 7 Special Installations or Locations, which was not included in the previous edition of the IEE Wiring Regulations. On the MOD estate funfairs are either supplied with power through stand alone mobile generators or through provision of mains supply via temporary connections. Whatever means of supply is used this section of BS 7671 is applicable to all temporary electrical installations. All temporary electrical installations for structures, amusement devices and booths at fairgrounds, amusement parks and circuses are in scope of this section. The requirements of Section 740 do not apply to:

• Internal electrical wiring of machines • Permanent electrical installations

Risks associated with temporary electrical installations for structures, amusement devices and booths at fairgrounds, amusement parks and circuses are:

• Temporary nature of the installation • Frequently installed, dismantled, moved to a new location, reinstalled and

operated • Repeated connection of the units and possible effect on connections and cables • Different connection facilities at different sites • Difficulties establishing an equipotential zone • Effect of vibration and movement of structures during operation • Exposed to the elements • Open to the general public • House animals and livestock • Operated as place of work

Regulation Group 740.5 details the requirements relating to selection and erection of equipment that are too numerous to outline here. The following table lists some of the general requirements or categories that need to be considered are in Table 10.

Requirement

Regulation Remark

Supply voltage shall not exceed 230/400 V ac or 440 V dc

740.313.1.1

Automatic disconnection shall be by a 300 mA max RCD

740.410.3 RCD with time delay to discriminate with final circuit RCDs

Protective measure of Obstacles is not permitted, placing out of reach is permitted for electric dodgems

740.410.3

Non-conducting location and earth free local equipotential bonding are not permitted

740.410.3.6

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Requirement

Regulation Remark

All final circuits for lighting, socket-outlets up to 32 A and mobile equipment up to 32 A to be 30 mA protected

717.415 Unless they are SELV, PELV or by electrical separation or lighting circuits placed out of arm’s reach and not supplied by non-industrial socket-outlets

In addition to RCD protection, supplementary equipotential bonding is required for locations intended for livestock

740.415.2.1

Automatically or remotely controlled motors which are not continuously supervised must be fitted with a manually reset protective device against excessive temperature

740.422.3.7

The electrical installation, between its origin and any equipment is required to be inspected, tested and certified, in line with Part 6, after each assembly on site

740.6 Internal electrical wiring of roller coasters, electric dodgems and similar equipment are excluded

Selection and Erection of Equipment Switchgear and control gear placed in lockable cabinet

740.51

Electrical equipment shall be at least IP44 protected 740.512.2 Where cables are buried in the ground, the route should be marked at suitable intervals and be protected against mechanical damage

740.521.1

Luminaires and decorative lighting chains: • shall use H05RN-F (BS 7919) cable or

equivalent, and • if mounted less than 2.5 m (arm’s reach)

above floor level or otherwise accessible to accidental contact should be firmly fixed and so sited or guarded to prevent risk of injury to persons or ignition of materials.

740.55.1.1

• Luminaires and floodlights are to be fixed so that they do not cause ignition of any material

740.55.1.5

Socket-outlet and plugs are to be: • of the industrial type to BS EN 60309-1 or

BS EN 60309-2 if used outdoor, and • placed out of arm’s reach and labelled

according to their purpose if for lighting circuits

740.55.7

Every electrical installation (booth, stand etc) to have its own isolation and isolation devices must isolate all live conductors

740.537.1 & 740.537.2.2

Each amusement device connection point must be marked to indicate rated voltage, rated current and rated frequency

717.514

Table 10: Requirements for Fairgrounds, Amusement Parks and Circuses.

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17.0 MAINTAINABILITY The subject of maintenance and maintainability appear in a number of statutory and non-statutory publications: The CDM imposes responsibilities on the Designer to assess the likely future requirements for future maintenance in the early stages of the electrical installation design, and taken account into the design. It is important that the installation can be maintained without undue difficulty and kept in safe condition throughout its life.

The EAWR imposes responsibilities on Dutyholders21 to maintain their installations in a safe condition at all times to prevent the risk of electrical injury (Regulation 4(2) refers). It follows that the electrical installation designer has an obligation to assess foreseeable maintenance requirements and to incorporate adequate provision(s) for them in the overall design. Regulation 341.1 requires that an assessment is made of the frequency and quality of maintenance that an electrical installation can be reasonably expected to receive during its intended life. HSR25 Memorandum of guidance on the EAWR, in the guidance to Regulation 4(2), indicates that the quality and frequency of maintenance should be sufficient so far as is reasonably practicable. Installation designers should note Regulation 341.1 which requires that the person or body responsible for the operation and/or maintenance of the installation shall be consulted. On the MOD estates, where applicable, this implies that the Authorising Engineer (AE), through the MMO, is consulted on the design, installation and maintenance issues at an early stage. Timely consultation can prevent a host of design and maintenance issues, which frequently require expensive and time consuming remedial work. It is therefore imperative that maintenance staff and organisations are consulted during the design process, so that installations are designed with future maintenance requirements in mind. Section 9 of the Regulations deals with the selection and erection of electrical equipment in relation to maintainability of an electrical installation, including cleaning of such equipment, and requires, amongst other things, that provisions are made for the safe and adequate access to all parts of the wiring system which may require maintenance. For example, luminaires should preferably be fitted with a suitable luminaire supporting coupler or a suitable plug and socket arrangement to provide for a safer method of working during lamp replacement and cleaning. 18.0 DOCUMENTATION 18.1 Requirement Under UK law compliance with statutory regulation is required regardless of contractual terms and conditions and therefore the requirements for health and safety documentation such as required for CDM compliance should not need to be specifically identified. The provision of such documents is a legal requirement and it is not possible to manage electrical infrastructure in accordance with the law without them. Therefore contractors are to be specifically tasked with their provision and no electrical infrastructure, no matter how small, should be accepted for handover without appropriate supporting documentation.

21 A person who has overall responsibility for the maintenance, safety and quality of the electrical installation and electrical equipment.

34

18.2 Certification On the completion of the electrical installation work inspection and testing is to be carried out and certification is to be provided as shown in Table 4, together with the Schedule of Inspections and Schedule of Test Results. The appropriate certificate/report is to be handed to the person ordering the work to retain for the whole working life of the installation.

Type of Work Completed

Type of Form Required

New Installation or change to existing installation

Electrical Installation Certificate

New installation work that does not include the provision of new circuit

Electrical Installation Certificate or Minor Electrical Installation Work Certificate

Alterations or additions Electrical Installation Certificate Alterations or additions that does not include the provision of a new circuit

Electrical Installation Certificate or Minor Electrical setting up Work Certificate

Table 10: Type of Work and Certification Form.

18.3 Handover Documents Prior to the transfer of maintenance responsibility the Principal Contractor is to hand over to the MMO the Operation and Maintenance Manual for the electrical installation through the CDM Coordinator (where appointed). The manual shall contain the following minimum information on the electrical element of the work:

• The installation design specification. • As installed drawings. • Electrical Installation Certificates/Minor New Works Certificate. • Cable route plans. • Single line diagrams. • Protection and grading report, where applicable. Fairgrounds, Amusement Parks and

Circuses • Equipment schedules. • Circuit label schedules. • Feeder pillar schedules. • The recommended periodic inspection and test intervals for the installation

(including where necessary, different parts of installations). • A maintenance schedule for all installed electrical equipment (including the

necessary personnel competency requirements). • Manufacturers’ technical specifications, including recommended maintenance

procedures and intervals. • Safe systems of work and isolation procedures specific to the installation or

equipment. • All special instructions for the operation and maintenance of equipment, such as

access arrangements, safe isolation, powering-down and start-up procedures.

A-1 -

Annex A – Definition of Statutory and Mandatory Compliance ___________________________________________________

STATUTORY COMPLIANCE 1. Statutory Compliance is understood and agreed to be:

a. Compliance with any act or regulation applicable to the infrastructure and the estate. b. The meeting of prescribed standards and compliance with all testing and inspection regimes applicable to the infrastructure and the estate, as demanded by the regulations. c. Support/input to Occupational compliance where the infrastructure and estate is a relevant factor, e.g. Fire Risk Assessments. d. Related to the delivery of works and associated management activities undertaken by Defence Estates and its contractors including the provision of maintenance for equipment and facilities to ensure establishment activity is maintained.

2. Statutory Compliance must cover the DE-managed Estate and not just that within extant funded contracts. MANDATORY COMPLIANCE 3. Mandatory Compliance is defined as:

a. The compliance with any Departmental mandated regulation22 applicable to the infrastructure and the estate.

b. The meeting of prescribed standards and the compliance with all testing and inspection regimes required in accordance with regulations. c. Related to the delivery of works and associated management activities undertaken by Defence Estates and its contractors including the provision of maintenance for equipment and facilities to ensure establishment activity is maintained.

4. Mandatory Compliance must cover the DE-managed Estate and not just that within extant contracts.

22 A mandate is an MoD-wide (including where led by a single service) standard or requirement issued by the relevant governing body, who holds regulatory control and has the authority to prevent the functional output from continuing due to the condition of the estate.

B-1 -

Annex B – Definitions ___________________________________________________ Competent Person A person who possesses sufficient technical knowledge and experience for the

nature of the electrical work undertaken, and is able at all times to prevent danger, and where appropriate injury, to themselves and others. (A Dutyholder may or may not be a competent person).

Danger Risk of injury to persons (and livestock where expected to be present) from fire, electric shock, burns, arcing and explosion arising from use of electrical energy, and mechanical movement

Dutyholder Every person who has, by virtue of a contract or tenancy, an obligation of any extent in relation to the maintenance or repair of non-domestic premises, or any means of access or egress to or from. This includes the CO/HoE, DE DD EM and any Maintenance Management Organisation (MMO). In this guidance the ‘Dutyholder’ refers to the CO/HoE unless it is clearly shown that someone else is carrying out the duties on their behalf e.g. ‘the DE DDEM as Dutyholder’ or the MMO as Dutyholder’

Electrical Appliance An item of current-using equipment other than a luminaire or an independent motor

Electrical Equipment Any item for such purposes as generation, conversion, transmission, distribution or utilisation of electrical energy, such as machines, transformers, apparatus, measuring instruments, protective devices, wiring systems, accessories, appliances and luminaires

Fixed Equipment Equipment designed to be fastened to a support or otherwise secured in a specific location

Hazardous Area Area in which an explosive gas atmosphere is present, or may be expected to be present, in quantities such as to require special precautions for the construction, installation and use of apparatus

High Voltage Normally exceeding Low Voltage Injury In the context of the guidance: Death or injury caused by electrical means or

from fire or explosion initiated by electrical energy Instructed Person A person adequately advised or supervised by a skilled person to enable them

to avoid dangers which electricity may create. Low Voltage Exceeding 50 V a.c. or 120 V ripple-free d.c., whether between conductors or

to Earth but not exceeding 1000 V a.c. or 1500 V d.c. between conductors, or 600 V a.c. or 900 V between conductors and Earth

Maintenance Management Organisation (MMO)

The generic term MMO has been used to represent the contractor providing maintenance services under all delivery methods, e.g. PPP / PFI / RPC / MAC etc

Ordinary Person A person who is neither a skilled person nor an instructed person. Portable Equipment Electrical equipment that is moved while in operation or which can be easily

moved from one place to another while connected to the supply Single Living Accommodation

Accommodation provided for the use of single (unaccompanied) service personnel for his / her exclusive use. These can be accommodation in messes as well as those accommodation blocks provided under SLAM

Skilled Person A person with technical knowledge or sufficient experience to enable them to avoid dangers which electricity may create.

System An electrical system in which all the electrical equipment is, or may be electrically connected to a common source of electrical energy and includes such source and such equipment

• PME System An earthing arrangement, found in TN-C-S systems, in which the supply neutral conductor is used to connect the earthing conductor of an installation with Earth, in accordance with ESQCR 2002

• TN-S System A system having separate neutral and protective conductors throughout the system

• TN-C-S System A system in which neutral and protective functions are combined in a single conductor in part of the system

• TT System A system having one point of the source of energy directly earthed, the exposed-conductive parts of the installation being connected to earth electrodes electrically independent of the earth electrodes of the source

C-1

Annex C – Further References ___________________________________________________

BRE Digest 498: Selecting Lighting Controls, BRE, 2006

BS 5485:1977 (1993) Specification for Safety Requirements for Indication and Recording Electrical Measuring Instruments and Accessories (BS withdrawn but useful for older instruments) BS 7430:1998 Code of Practice for Earthing

BS 7671:2008 Requirement for Electrical Installations IEE Wiring Regulations Seventeenth Edition

BS EN 60079-17:2007 Electrical Apparatus for Explosive Gas Atmosphere – Part 17: Inspection and Maintenance of Electrical Installations in Hazardous Areas (other than mines) BS IEC 61000-5-2:1997 Electromagnetic Compatibility (EMC) – Part 5: Installation and Mitigation Guidelines Section 2: Earthing and Cabling BS EN 61010 Safety Requirements for Electrical Equipment for Measurement, Control, and laboratory Use Construction (Design and Management) Regulations 2007

Electricity at Work Regulations 1989

Electricity Safety Council Best Practice Guide Number 2: Guidance on safe isolation procedures for low voltage installations Energy Saving Trust: A guide to the phase out of Inefficient Light Bulbs

ESTC Standard No. 6 Requirements for the Commissioning, Inspection, Testing and Maintenance of Works for Explosive Facilities 2006 Part 1 – Electrical Guidance Note 3 to BS 7671:2008 Inspection and Testing

Guide to the Wiring Regulations 17th Edition IEE Wiring Regulations (BS 7671:2008) Electrical Contractors’ Association Reprinted February 2008 HSR25: Memorandum of Guidance on the Electricity at Work Regulations 1989

HSE GS38 (revised) Electrical test equipment for use by electricians

IET Code of Practice for the In-service Inspection and Testing of Electrical Equipment

17th Edition IEE Wiring Regulations: Inspection, Testing and Certification Sixth Edition (2008) by Brian Scaddan JSP 315: Services Accommodation Code Volume 1

JSP 375 Volume 2 Leaflet 34: 4C System Management of Visiting Workers and Contractors

JSP 375 Volume 3 Chapter 3: Electricity Safety Rules and Procedures

JSP 480: Defence Coordinating Installation Authority Manual of Regulations for the Installation of Communications Information Systems JSP 482: MOD Explosive Regulations.

JWP 4-05: Infrastructure Management on Joint Operations

The Construction (Design & Management) Regulations 2007

The Electricity Safety Council Technical Manual – the definitive interactive guide to electrical installation standards The Electricity Safety, Quality and Continuity Regulations 2002, Statutory Instrument 2002 No. 2665 The IEE Code of Practice for In-service Inspection and Testing of Electrical Equipment 3rd Edition