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On-Site Guide IET Wiring Regulations 18th Edition BS 7671-2018 (PDF)

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Pages: 219 pages
Size: 186 MB
Publisher: IET
Author (s): IET
Language: English
Date of Publication:  2018

The On-Site Guide is an essential guide for quick reference of information on BS 7671 (The IET Wiring Regulations) the national standard to which all domestic and industrial wiring must conform.

This book incorporates the extensive changes in BS7671 18th Edition, making this a vital guide for keeping up to date. It enables the competent electrician to deal with installations (up to 100 A, 3-phase) providing essential information in a convenient, easy-to-use format, excellent for taking out on-site.

The 18th Edition IET Wiring Regulations publishes in July 2018 and comes into effect on 1st January 2019. All new installations from this point must comply with BS 7671:2018.


Cooperating organisations
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 protective devices (SPDs)
3.8 Arc Fault Detection Devices (AFDD)
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
5.5 Emergency switching
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 switchgear and controlgear
6.3 Unexpected presence of nominal voltage exceeding 230 V
6.4 Earthing and bonding connections
6.5 Purpose of switchgear and controlgear
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
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 systems
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
11.3 General-purpose RCCBs to BS EN 61008 or RCBOs to BS EN 61009 and BS EN 62423 RCD protected socket-outiets to BS 7288
11.4 Additional protection
11.5 Integral test device
11.6 Multipole RCDs
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 aluminum conductors
Appendix J Selection of devices for isolation and switching
Appendix K Identification of conductors
Appendix L Degrees of protection provided by enclosures

Tags: on site guide 2018, 18th edition guide, iet on-site guide, 18th ed on-site guide, on-site guide, wiring reg on site guide

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Reviews (1)
Excellent edition. Suitable for self-study. Thank you!