SELECT encourages tradespeople to get up to speed with Amendment 4 updates

​​​​​​​Amendment 4 can be implemented immediately upon publication on 15 April, with the previous version to be withdrawn on 15 October

SELECT has welcomed the latest amendment to the IET Wiring Regulations, and is urging the trade to familiarise themselves with the updates to ensure the ongoing safety of contractors and customers.

The Institution of Engineering and Technology (IET) and British Standards Institution (BSI) have announced the completion of work on Amendment 4 (2026) to BS 7671:2018, AKA the 18th Edition.

Set for release in April, significant changes in BS 7671:2018+A4:2026 include:

• A new chapter on stationary secondary batteries for electrical storage and supply of electrical installations
• A new section on functional earthing and functional equipotential bonding for information and communication technology (ICT) equipment and systems
• A new section on Power over Ethernet (PoE)
• 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.

Amendment 4 can be implemented immediately upon publication on 15 April, with the previous version, BS 7671:2018+A2:2022+A3:2024, to be withdrawn on 15 October.

Other changes include incorporating Amendment 3:2024 into the main document and further adopting CENELEC Harmonised Documents and IEC standards, as the UK continues to include standards for new and emerging technologies.