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.

On-Site Guide contains clear, concise guidance to the technical information contained in the Regulations.
It enables the competent electrical installer to deal with installations up to 100 A, three-phase, providing essential information in a convenient easy-to-use form.

BS 7671:2018+A2:2022 incorporates changes from the first amendment, published in 2020, regarding Electric Vehicle Charging Installations to provide greater guidance on embracing changing technology within this sector.

Additional changes within the second amendment include protection against thermal effects and fire caused by electrical equipment, protection against voltage disturbances and electromagnetic disturbances, and a new chapter on prosumer's low-voltage electrical installations covering energy efficiency measures, the interface with the smart grid, the management of electricity consumption, the management of renewable sources of electricity, and energy storage.

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 RCCBsto 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

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