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United Kingdom · Wiring Regulations exam

Amendment 4: the latest BS7671 amendment

The current version is BS 7671:2018+A4:2026, and the IET calls it the current edition of the national standard for electrical installations in the UK. The IET's shop says you need a copy from 15 April 2026. As the BS7671 latest amendment, it's also what City & Guilds' 2382‑26 exam tests.

Get the Amendment 4 book

Updated October 2026 · Written from official sources, listed at the bottom of this page

What changed in the BS7671 latest amendment?

  • A new chapter on stationary secondary batteries used to store electricity and supply installations.
  • A new section on functional earthing and functional equipotential bonding for information and communication technology (ICT) equipment and systems.
  • A new Section 716 on Power over Ethernet (PoE).
  • A major revision of Section 710, Medical locations.
  • A schedule of test results for recording the resistance of supplementary protective equipotential bonding conductors.

The outline of the IET's Amendment 4 course also lists changes to Parts 1 to 5, a new Chapter 57, and changes to special locations and the appendices.

The new bonding schedule and other model forms →Special locations, including Section 710 →

When Amendment 4 applies

The IET's shop gives 15 April 2026 as the date from which you need a copy, and City & Guilds made centres switch to 2382‑26 from 16 April 2026. The older Amendment 2 and Amendment 3 books had a transition period, and it's now over.

When Amendments 2 and 3 ended →

Getting the Amendment 4 book

Amendment 4 isn't a free download. It comes as a new printed book, the IET's Orange Book, or inside an IET digital subscription. The IET has published free A4 model forms, and a 9th edition of the On-Site Guide to match.

Book, digital and PDF options →

Amendment 4 and the 18th Edition exam

If you passed 2382‑22, you studied Amendment 2. Updating to 2382‑26 is what the one-day bridging and update courses are for. Whether you have to update depends on your employer or scheme, not on BS7671 itself. City & Guilds runs 2382‑26 in Scotland as well as England, Wales and Northern Ireland.

The 2382-26 qualification →BS7671 and the Wiring Regulations →
Sources: IET · IET Shop · City & Guilds and 4 more. Checked October 2026.

Rules and fees can change, so check the official site before your test.

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