On Site Guide to BS 7671:2018+A2:2022, 8th Edition 2022 (PDF)

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About:

Edition: 8th Edition 2022

Pages: 245

Publisher: IET

Author: IET

Language: English;

Size: 107 Mb;

Updated to BS 7671:2018+A2:2022 IET Wiring Regulations.

This publication has been further updated to include two subsequent amendments to the IET Wiring Regulations as BS 7671:2018+A2:2022.

Content:

Cooperating organizations

Acknowledgements

Preface

Section 1 Introduction

1.1 Scope

1.2 Building Regulations

1.3 Basic information required

1.4 Intended departures from BS 7671

Section 2 The electrical supply

2.1 General layout of equipment

2.2 Function of components

2.3 Separation of gas installation pipework from the electrical installation

2.4 Portable generators

Section 3 Protection

3.1 Types of protective device

3.2 Protection against overload current

3.3 Protection against short-circuit current and earth fault current

3.4 Protection against electric shock

3.5 Automatic disconnection

3.6 Residual current devices (RCDs)

3.7 Surge protection devices (SPDs)

3.8 Arc fault detection devices (AFDDs)

Section 4 Earthing and bonding

4.1 Protective earthing

4.2 Legal requirements

4.3 Main protective bonding

4.4 Earthing conductor and main protective bonding conductor cross-sectional areas

4.5 Main protective bonding of plastic services

4.6 Supplementary bonding

4.7 Additional protection - supplementary equipotential bonding

4.8 Supplementary bonding of plastic pipe installations

4.9 Earth electrode

4.10 Types of earth electrode

4.11 Typical earthing arrangements for various types of earthing system

Section 5 Isolation and switching

5.1 Isolation

5.2 Switching off for mechanical maintenance

5.3 Emergency switching off

5.4 Functional switching

5.5 Firefighter's switch

Section 6 Labelling

6.1 Retention of a dangerous electrical charge

6.2 Where the operator cannot observe the operation of switch gear and control gear

6.3 Unexpected presence of nominal voltage exceeding 230 V

6.4 Earthing and bonding connections

6.5 Purpose of switch gear and control gear

6.6 Identification of protective devices

6.7 Identification of isolators

6.8 Isolation requiring more than one device

6.9 Periodic inspection and testing

6.10 Diagrams

6.11 Residual current devices (RCDs)

6.12 Warning notice: non-standard colours

6.13 Warning notice - alternative supplies

6.14 Warning notice - high protective conductor current

6.15 Warning notice - photovoltaic (PV) systems

6.16 Warning and user instruction labels

Section 7 Final circuits

7.1 Final circuits

7.2 Standard final circuits

7.3 Installation considerations

7.4 Proximity to electrical and other services

7.5 Earthing requirements for the installation of equipment having high protective conductor current

7.6 Electrical supplies to furniture

7.7 Trunking installations

7.8 Additions and alterations

7.9 Installation and use of non-standard cables

7.10 EMC Directive and compatibility

7.11 Wiring systems in escape routes

Section 8 Locations containing a bath or shower

8.1 Summary of requirements

8.2 Shower cubicle in a room used for other purposes

8.3 Underfloor heating systems

Section 9 Inspection and testing

9.1 Inspection and testing

9.2 Inspection

9.3 Testing

Section 10 Guidance on initial testing of installations

10.1 Safety and equipment

10.2 Sequence of tests

10.3 Test procedures

Section 11 Operation of RCDs

11.1 General test procedure

11.2 General-purpose RCCBs to BS 4293 and RCD protected socket-outlets and fused connection units to editions of BS 7288 earlier than 2018

11.3 General-purpose RCCBs to BS EN 61008 or RCBOs to BS EN 61009 and BS EN 62423

11.4 RCD protected socket-outlets and fused connection units (ECU) to BS 7288:2016

11.5 Additional protection

11.6 Integral test device

11.7 Multipole RCDs

Section 12 Prosumer's electrical installations

12.1 Prosumer's installations

12.2 Types of prosumer's electrical installation

12.3 Operating modes

Appendix A Maximum demand and diversity

Appendix B Maximum permissible measured earth fault loop impedance

Appendix C Selection of types of cable for particular uses and external influences

Appendix D Methods of support for cables, conductors and wiring systems

Appendix E Cable capacities of conduit and trunking

Appendix F Current-carrying capacities and voltage drop for copper conductors

Appendix G Certification and reporting

Appendix H Standard circuit arrangements for household and similar installations

Appendix I Resistance of copper and aluminium conductors

Appendix J Selection of devices for isolation and switching

Appendix K Identification of conductors

Appendix L Degrees of protection provided by enclosures (IP code)

Index

Tags: on site guide 2022-8th edition, on site guide bs 7671, on site guide A2:2022, A2:2022 on site guide bs 7671, A2:2022 on site guide edition 2022