18th Edition Book Bundle (Wiring Regulations, Guidance Note 3 and On-Site Guide)+A4:2026
£190.00
IET Wiring Regulations, 18th Edition, BS 7671:2018+A4:2026
The IET Wiring Regulations is the national standard for electrical installations in domestic, commercial and industrial settings. It is the essential standard for all those concerned with the design, installation, certification and maintenance of electrical installations. Amendment 4:2026 is a major update to BS 7671:2018, The IET Wiring Regulations, Eighteenth Edition.
BS 7671:2018+A4:2026 is a consolidated publication which incorporates all previous amendments to the standard. New inclusions within BS 7671:2018+A4:2026 are: Stationary Secondary Batteries where the purpose is for electrical storage and supply of electrical installations; Functional earthing and functional equipotential bonding for information and communication technology (ICT) equipment and systems; a new section on Power over Ethernet (PoE) and a major revision of Section 710 Medical Locations and the inclusion of a schedule of test results for recording the resistance of supplementary protective equipotential bonding conductors.
From 15th April 2026 you will need to have a copy of BS 7671:2018+A4:2026, known as 'the orange book'.
Guidance Note 3: Inspection & Testing, 10th Edition
Guidance Note 3: Inspection & Testing is a fundamental guidance book for all those involved with the testing and inspection of electrical installations. It also contains essential guidance for those studying for inspection and testing qualifications and has been fully updated to BS 7671:2018+A4:2026, including identification of conductors, Stationary Secondary Batteries, Prosumers Electrical Installations, Recommended initial frequencies of inspection of electrical installations and Maximum permissible measured earth fault loop impedance (EFLI).
The On-Site Guide is an essential guide to BS 7671. It incorporates the extensive changes to BS 7671, making this a vital guide for keeping up to date. It enables the competent installer to deal with installations (up to 100 A, 3-phase) providing essential information in a convenient, easy-to-use format. This publication has been further updated to include all four amendments to the 18th Edition and aligns with BS 7671:2018+A4:2026 The IET Wiring Regulations.
BS 7671:2018+A4:2026 incorporates changes from all four amendments to BS 7671:2018 and the On-Site Guide includes new topics, such as bidirectional and unidirectional protective devices; Stationary Secondary Batteries; amended rational for maximum Zs values for protective devices; guidance on selection of RCDs and guidance on prospective fault current for protective devices.