From the BS 7671 Brown Book to Brian Scaddan's apprentice textbooks, these are the essential reads for UK electricians in 2026. Whether you are a first-year apprentice or an experienced inspector, this guide covers every book worth buying — and how Elec-Mate complements your bookshelf on site.
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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 four essentials are BS 7671:2018+A2:2022 (the Brown Book), the IET On-Site Guide, IET Guidance Note 3 (Inspection and Testing), and a Brian Scaddan training textbook. Domestic installers should add the Electrician’s Guide to the Building Regulations for Part P. Keep the free A4:2026 amendment PDF with your Brown Book.
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In an age of apps, AI, and instant search, physical books remain essential for electricians. The 18th Edition wiring regulations are the legal foundation of your work. The IET Guidance Notes provide the practical interpretation you need to apply those regulations correctly. And the best training textbooks give apprentices and experienced electricians alike the deep understanding that no quick search can provide.
This guide covers the essential books every UK electrician should own, from the BS 7671 Brown Book to exam preparation texts. Whether you are a first-year apprentice building your bookshelf or an experienced electrician updating your library for the latest amendments, this is your reading list for 2026.
| Book | Who needs it | Indicative price |
|---|---|---|
| BS 7671 (Brown Book) | Every electrician | £90 — £100 |
| On-Site Guide (OSG) | Every electrician — daily use | £30 — £35 |
| Guidance Note 3 (GN3) | Inspectors, 2391 students | £35 — £40 |
| Electrician's Guide to the Building Regs | Domestic electricians (Part P) | £30 — £35 |
Prices are indicative market guidance, not a quote — check the IET and trade suppliers for current pricing.
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.
BS 7671 — universally known as "the Brown Book" due to its cover colour — is the definitive reference for electrical installation in the UK. It contains every regulation, every table, and every appendix that governs how electrical work must be designed, installed, inspected, and tested.
Every electrician must own the current edition. It is referenced on every EICR, every EIC, and every Minor Works Certificate. It is required for the 18th Edition course and the 2391 exam. When a competent person scheme auditor visits, BS 7671 should be on your shelf.
The current printed edition is BS 7671:2018+A2:2022 (incorporating Amendments 1 and 2). Amendment 4 (A4:2026) is a free PDF supplement available from the IET website — download it and keep it with your Brown Book. Among the A4:2026 changes, Regulation 530.3.201 requires the selection and erection of protective equipment to take account of whether a device is unidirectional or bidirectional — relevant to installations with solar PV, battery storage, and other sources that can export energy.
The On-Site Guide is the practical companion to BS 7671. Where the Brown Book gives you the regulations, the OSG gives you the quick-reference tables and simplified guidance you need day-to-day on site. It distils the data you reach for most often into a tool-bag-sized book:
Installation-method tables for tabulated current (It) — the starting point for every cable-sizing calculation.
Earth fault loop impedance limits by protective device type and rating, so disconnection times are met.
Grouping, ambient temperature, and thermal insulation factors applied when de-rating a cable.
Maximum disconnection times from BS 7671 Table 41.1 for automatic disconnection of supply.
Simplified guidance and example circuits for common domestic ring and radial arrangements.
Minimum sizes for main protective bonding and circuit protective conductors.
One table candidates lean on most is the maximum disconnection times for automatic disconnection of supply. These are set by BS 7671 Regulation 411.3.2.2 and Table 41.1 for final circuits up to 63 A with socket-outlets (or 32 A supplying fixed equipment), at a nominal line-to-earth voltage of 230 V AC:
| Circuit / system | Max disconnection time |
|---|---|
| Final circuit, TN system (230 V AC) | 0.4 s |
| Final circuit, TT system (230 V AC) | 0.2 s |
| Distribution circuit, TN system | 5 s |
| Distribution circuit, TT system | 1 s |
Final-circuit values from BS 7671:2018 Table 41.1; distribution-circuit values from Regulations 411.3.2.3 (TN) and 411.3.2.4 (TT). Indicative summary — always confirm against the current standard for the exact system and voltage.
The OSG is small enough to carry in your tool bag or van and is the book most electricians reach for most often. It is also permitted in the 2391 exam alongside BS 7671 and GN3 — tab the key tables in advance so you can find them quickly under exam conditions.
All the cable sizing tables, Zs limits, correction factors, and disconnection times from the OSG are built into Elec-Mate's 70+ calculators.
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Guidance Note 3 is the single most important reference for anyone carrying out inspection and testing. It covers the correct sequence of tests, how to interpret test results, how to complete certificates and schedules of test results, and how to assign observation codes (C1, C2, C3, FI).
GN3 is essential reading for the 2391 qualification and is permitted in the exam. It provides worked examples of test procedures, guidance on interpreting marginal results, and advice on the professional judgement required when assigning observation codes. Even experienced inspectors refer to GN3 when they encounter unusual installations or borderline test results.
The current edition is the 9th Edition, aligned with the 18th Edition of BS 7671. It was updated to reflect the changes in Amendment 2.
This IET publication bridges the gap between BS 7671 and the Building Regulations — specifically Part P (Electrical Safety in Dwellings). It explains which domestic electrical work is notifiable, which work can be done without notification, and how competent person schemes operate.
For domestic electricians, this book is as important as BS 7671 itself. It covers the practical application of the regulations to real-world domestic situations — consumer unit changes, kitchen rewires, bathroom circuits, garden lighting, and outbuilding supplies. It also includes guidance on certificates and notification requirements.
AI-generated mocks, instant marking, and explanations on every question — targeted at your weakest topics. From £6.99/mo.
Start practising freeBrian Scaddan is the most widely read author in UK electrical training. His books are used on college courses across the country and are recommended by training providers, tutors, and experienced electricians alike.
The comprehensive textbook used on most Level 2 and Level 3 college courses. Covers science principles, installation methods, inspection and testing, fault diagnosis, and the 18th Edition regulations. Written in clear, accessible language with worked examples and practice questions. Price: £35 to £45.
A companion to BS 7671 that explains the regulations in plain English with diagrams and illustrations. Excellent for understanding the reasoning behind the regulations rather than just memorising them. Price: £25 to £35.
Covers the design process — selecting cables, protective devices, and earthing arrangements to meet BS 7671 requirements. Includes worked examples of cable sizing calculations, Zs verification, and circuit design. Essential for Level 3 students and the 2391 qualification. Price: £25 to £35.
When buying Brian Scaddan books, always check the publication date. Some titles have been updated for the 18th Edition; older editions covering the 17th Edition are still available and should be avoided unless you need them for reference.
Whether you are preparing for the 18th Edition course (2382), the 2391 inspection and testing exam, or the AM2 practical assessment, targeted exam preparation books can make the difference between passing and failing.
Practice questions and mock exams for the City and Guilds 2382-22 (18th Edition) course. The exam is open-book — you can take BS 7671 and the OSG.
Covers both the written exam and the practical assessment. Includes practice questions, worked examples of certificate completion…
The AM2 is a practical assessment, so the best preparation is hands-on practice. However, guides that explain the marking criteria, common mistakes…
Various publishers produce study guides aligned with the City and Guilds 5357 and EAL qualifications.
Level 2, Level 3, AM2, and EPA preparation courses with interactive modules, practice questions, and AI-powered tutoring.
Try it free for 7 daysBeyond the core texts, these additional publications are worth investing in as your career develops and you take on more specialised work — for example, the IET Code of Practice for EV charging equipment installation complements the Section 722 requirements in BS 7671:
Essential for electricians installing EV chargers. Covers cable sizing, earthing, protection, and the specific requirements of Section 722 of BS 7671.
Covers the requirements for bathrooms, swimming pools, saunas, construction sites, marinas, caravan parks…
In-depth guidance on TN-S, TN-C-S, and TT earthing systems, protective bonding, and earth electrode testing.
The definitive reference for PAT testing in the UK. Covers appliance classification, test procedures, pass/fail criteria, and recording requirements.
Covers BS 5266 emergency lighting design, installation, testing, and certification. Increasingly important as fire safety regulations tighten following…
Building a quality bookshelf takes time and money. Start with the essentials (BS 7671, OSG, GN3) and add specialist titles as your career develops. Complement your books with Elec-Mate for on-site access to regulation references, calculators, and AI-powered guidance.
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