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The landscape of electrical installations is evolving, and the standards are moving with it. The Institution of Engineering and Technology (IET) and the British Standards Institution (BSI) have officially signed off on the content for Amendment 4 to the 18th Edition of the IET Wiring Regulations (BS 7671:2018).
Scheduled for publication on 15 April 2026, this amendment introduces critical updates reflecting the industry’s shift toward smarter technology and sustainable energy storage.
Amendment 4 is more than a minor tweak; it addresses the integration of modern digital infrastructure and green energy solutions. The most significant additions include:
Stationary Secondary Batteries: A brand-new chapter dedicated to electrical storage and supply systems, ensuring the safe installation of battery technology for commercial and industrial use.
Power over Ethernet (PoE): New regulations to govern the delivery of power via data cabling, reflecting the rise of smart building tech and connected devices.
ICT Infrastructure: Updated sections on functional earthing and equipotential bonding specifically tailored for Information and Communication Technology systems.
As an EDIS user, staying compliant is central to your operational efficiency. These updates will impact how electrical certificates are generated and how installations are audited. Proactive preparation ensures that your team is ready to implement these changes the moment the amendment becomes active.
Mark Your Calendar: Ensure your technical leads are aware of the 15 April 2026 publication date.
Review Storage Projects: If your business is involved in UPS or renewable energy storage, familiarize yourself with the new chapter on secondary batteries.
Audit Your Data Systems: With PoE and ICT earthing updates, coordination between electrical and IT departments will be more critical than ever.
Keep your compliance seamless. We will continue to update the EDIS platform to reflect these changes, ensuring your digital electrical certification remains accurate and up to date with BS 7671:2018+A4:2026.