18th Edition Wiring Regs (City & Guilds 2382): 2026 Guide

The 18th Edition exam is unusual in that it is open book — you sit it with your copy of the Regs beside you. That sounds easy until you realise you have roughly two hours to answer around 60 questions across a 500-page standard. Knowing the structure and how to navigate it quickly is the whole game, and the version you study now matters more than usual because the standard has just been amended.

What is the 18th Edition and BS 7671?

The "18th Edition" is shorthand for the current edition of BS 7671 — the IET Wiring Regulations, the national standard for the design, installation and inspection of electrical installations in the UK. When electricians say they are "18th Edition qualified", they mean they have passed an exam proving they understand this standard.

BS 7671 is not law in itself, but it is the recognised way of meeting the legal requirement to install electrical work safely. It is published jointly by the IET and BSI, and it is the reference every UK electrician is expected to work to. The 18th Edition replaced the 17th Edition in 2018, and since then it has been kept current through a series of amendments.

The 2026 amendment situation — study the current version

This is the part to get right in 2026. The wiring regulations are updated by amendment, and the consolidated standard currently in force is BS 7671:2018+A4:2026 (Amendment 4), published in April 2026. This is the version you should be studying and the one the latest exam is built around.

The previous version, BS 7671:2018+A2:2022 (Amendment 2), is being withdrawn on 15 October 2026. If you have an older copy of the Brown Book on your shelf, or older revision material, it is out of date — do not revise from it. Make sure both your copy of the Regs and your practice questions reflect the current A4:2026 edition.

Amendment 4 brought in and updated a range of content, including provisions around Power over Ethernet (PoE), prosumer and energy installations, and other technical updates that reflect how modern installations are changing. Because the exam is open book, these changes also affect where things sit in the standard — another reason to revise from a current copy rather than relying on memory of an older edition.

The City & Guilds 2382-26 exam format

The most common way to gain the 18th Edition qualification is the City & Guilds 2382, with the code now moved to 2382-26 to reflect Amendment 4. It is a knowledge exam sat at a City & Guilds approved centre — there is no practical element.

You sit the exam at an approved centre, and you can find one through the official City & Guilds website. Confirm the current fee and exact format with your chosen centre when you book, as these can vary slightly between providers.

How open-book works — and why fast referencing matters

An open-book exam sounds forgiving, but it catches a lot of people out. You are allowed to bring your copy of BS 7671 and refer to it during the exam. The catch is the maths: with around 60 questions in roughly two hours, you have only a couple of minutes per question. You cannot afford to read large sections of the standard from scratch for every question.

What separates a pass from a fail is how quickly you can find the right regulation, table or appendix. Candidates who know the layout of the book — which part covers protection against electric shock, where the inspection and testing requirements live, how the appendices and tables are organised — fly through it. Candidates who treat the book as a safety net to be searched cold run out of time.

In practice this means your revision is less about rote memorisation and more about becoming fluent in the structure of the Regs. Tabbing your copy, learning the part and chapter numbering, and repeatedly looking things up under time pressure are what build that fluency.

Who needs the 18th Edition?

The 18th Edition is aimed at practising electricians — both those already in the trade and those completing their qualifications. It is a knowledge exam that demonstrates you understand the current wiring regulations, and it is very commonly required for:

• Competent-person scheme membership — schemes such as NICEIC and NAPIT typically expect you to hold a current 18th Edition
• Employment and contracts — many employers and clients require it as evidence you are up to date with BS 7671
• Staying current — when a new amendment lands, electricians often re-sit to show they know the latest version

It is worth being clear: this is a knowledge qualification, not a practical one. It proves you understand the Regs; it does not on its own make you a qualified electrician. It often sits alongside other credentials. If your work involves testing portable appliances, for example, you may also look at a separate PAT testing qualification, which covers a different and more specialised area.

How and where to book

Booking the 2382-26 is done through a City & Guilds approved centre rather than centrally. To get started:

1. Find an approved centre near you via the official City & Guilds website
2. Check the centre offers the current 2382-26 exam (built around Amendment 4)
3. Confirm the fee, the date options and what ID you need to bring on the day
4. Make sure you have your own current copy of BS 7671:2018+A4:2026 to take into the exam

Centres differ on availability and pricing, so it is worth contacting a couple before committing.

How to prepare — learn to navigate the Regs

1. Get the current copy and live in it. Buy or download the current BS 7671:2018+A4:2026. Spend time simply turning pages so the layout becomes second nature — the parts, the chapters, the appendices and the key tables.

2. Practise looking things up against the clock. Because the exam is open book and time-pressured, your single most valuable skill is fast referencing. Work through practice questions with the book beside you and time how long it takes to locate each answer.

3. Use practice questions written for the current version. PassNova's 18th Edition practice questions are built around the current standard and give you explanations, so you learn where each answer comes from in the Regs, not just what it is.

4. Tab and index your book sensibly. You are allowed to add tabs and highlighting (check your centre's rules on what is permitted). A well-tabbed copy turns a frantic search into a quick flip.

5. Sit timed mocks. Around 60 questions in two hours is comfortable only if you have rehearsed at pace. Run full timed mocks so the clock does not unsettle you on the day.

Common mistakes

Revising from an out-of-date copy. With A2:2022 being withdrawn in October 2026, working from an older Brown Book or old revision notes is a real risk. Content has moved and changed — always study the current A4:2026 edition.

Treating open book as a substitute for preparation. The biggest cause of failure is running out of time. If you have not practised fast referencing, the open book becomes a trap rather than a help.

Not knowing the structure of BS 7671. Candidates who cannot navigate the parts, chapters and appendices quickly waste minutes per question and never finish. Learn the layout, not just the facts.

Ignoring the new content. Amendment 4 added and updated material such as Power over Ethernet and prosumer installations. Skipping the new areas because they were not in an older edition is an easy way to drop marks.

On the day — what to expect

You sit the 2382-26 at a City & Guilds approved centre on a computer. It is multiple choice, around 60 questions, with roughly two hours on the clock. You can have your copy of BS 7671 with you to refer to throughout. Bring the ID your centre asks for, arrive in good time, and pace yourself — flag anything you are unsure of and come back to it rather than burning time early on.

Because it is a knowledge exam, there is no practical to worry about on the day. Once you pass, you have current evidence that you understand the latest wiring regulations — exactly what schemes and employers are looking for. Line up your 18th Edition practice early, get fluent in the book, and the exam itself becomes far less daunting.