A focused study guide for the City & Guilds 2382-26 (or equivalent) 18th Edition Amendment 4:2026 exam. Covers what changed from A3, where to focus revision, exam format, and the five chapters that dominate the question paper. This guide is for qualified electricians taking or re-taking the 18th Edition (C&G 2382-26) exam.
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Written and reviewed by Andrew Moore, founder of Elec-Mate, against BS 7671:2018+A4:2026, IET Guidance Note 3 and the IET On-Site Guide.
The short answer
The City & Guilds 2382-26 tests BS 7671:2018+A4:2026. It is open book and multiple choice, lasting 2 hours, so you have about 2 minutes a question. A4 was issued on 15 April 2026, and the previous edition was withdrawn on 15 October 2026.
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01 · Exam Prep
Amendment 4:2026 was published 15 April 2026 and introduces: protective neutral bonding (PNB) in Regulation 312.2.1.1, a reworded Regulation 421.1.7(a) covering high rise residential buildings (the AFDD requirement itself dates from A2:2022), Table 52.1 for cables in walls, a new Section 545 for ICT functional earthing, a new Chapter 57 for stationary batteries, and a major revision of Section 710.
Free download · PDF
Every key change in the 2026 amendment on one page. AFDDs, TN-C-S protection, new schedule columns, model forms. Pinned on your van dash.
02 · Exam Prep
The City & Guilds 2382-26 exam is open book and multiple choice, lasting 2 hours, so you have about 2 minutes a question. Running out of time is the most common reason for failing. Practise against a timer, answer the questions you can find quickly first, and mark the rest to come back to. Check the current pass mark and booking details with your training centre.
03 · Exam Prep
Most questions come from: Chapter 41 (protection against electric shock: ADS, disconnection times, maximum Zs, RCDs), Chapter 43 (overcurrent protection and device coordination), Chapter 44 (Section 443, overvoltage protection and SPDs), Chapter 52 and Appendix 4 (cable selection, current-carrying capacity, correction factors, voltage drop), Chapter 53 (isolation and switching), Chapter 54 (earthing and protective conductors), Part 6 (inspection and testing) and Part 7 special locations.
04 · Exam Prep
Section 411 (Automatic Disconnection of Supply — by far the most-tested). Memorise the maximum Zs values for the common protective devices (BS 88-3, BS EN 60898 Type B, Type C, RCBOs). Section 415 (Additional Protection — RCDs, supplementary equipotential bonding). Section 421 (AFDDs, Reg 421.1.7: required in named premises since A2:2022, item (a) reworded at A4:2026). Section 422 (cable reaction to fire — A4:2026 introduces Cca classification).
In the app
AI-generated mocks, instant marking, and explanations on every question — targeted at your weakest topics. From £6.99/mo.
05 · Exam Prep
Section 511 (compliance with standards). Section 522 (selection by external influences). Section 525 and Appendix 4 (voltage drop: 3% for lighting and 5% for other uses from a public supply). Section 528 (proximity to other services and Band I/II segregation). Section 537 (isolation and switching). Section 543 (protective conductor sizes and the adiabatic equation). Section 545 and Chapter 57 are new at A4, so expect questions on them.
06 · Exam Prep
Run 100+ mock questions before the real exam. Time the last 30 questions you do — if you cannot finish 30 questions in 45 minutes you are too slow. Mark every question you got wrong and re-revise that topic the next day. Build a personal "wrong answer" notebook — re-read it once a week. Elec-Mate’s 18th Edition mock exam mode tracks accuracy AND time per question — gives you a heat map of weak topics.
07 · Exam Prep
Elec-Mate is built for UK electrical apprentices, qualified electricians, and business owners. Unit revision, AM2 mocks, OJT tracking, quoting, certification — all in one place. 7-day free trial.
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