IET have provided more information on the impact of Amendment 4:2026 on the 18th Edition of the IET Wiring Regulations and the reasoning behind why another amendment is to be issued.
Proposals are for the amendment to include
- Section 545, Functional earthing and functional-equipotential- bonding for information communication technology equipment and systems (ICT), such as broadcast, communication technology and computer network systems.
- Chapter 57, Stationary secondary battery installations.
- Section 716, Distribution of ELV DC power using balanced, information technology cables and accessories primarily designed for data transmission. Detailed requirements on low voltage generating sets.
In addition, there are updates throughout BS 7671, including changes to Requirements for medical locations; Requirements for firefighter’s switches; Chapter 65 concerning periodic inspection and testing, etc.
For more information on this subject, see the article on the IET website: The impact of Amendment 4:2026 on the 18th Edition of the IET Wiring Regulations.