The On-Site Guide is an essential guide to BS 7671. It incorporates the extensive changes in BS 7671:2018, 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.
The 18th Edition of the IET Wiring Regulations published in July 2018 and came into effect in January 2019. Changes from the previous edition include requirements concerning Surge Protection Devices, Arc Fault Detection Devices and the installation of electric vehicle charging equipment as well as many other areas.
Section 1: Introduction
Section 2: The electrical supply
Section 3: Protection
Section 4: Earthing and bonding
Section 5: Isolation and switching
Section 6: Labelling
Section 7: Final circuits
Section 8: Locations containing a bath or shower
Section 9: Inspection and testing
Section 10: Guidance on initial testing of installations
Section 11: Operation of 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 aluminium conductors
Appendix J: Selection of devices for isolation and switching
Appendix K: Identification of conductors
Appendix L: Degrees of protection provided by enclosure (IP code)
