Launch offer — valid today only

📄 Digital book in PDF · read it on your phone or print it

The 18th Edition Wiring Regs in Drawings: Know Which Page of BS 7671 to Open One Regulation Topic per Page

Earthing systems, the fault current loop, RCDs and RCBOs, Table 41.1, max Zs, cable sizing, voltage drop, bathroom zones and the test sequence. Each topic has its own page: the drawing first, then what you need to remember. 69 illustrated pages.

GET THE 18TH EDITION REGS ILLUSTRATED

🔒 Secure checkout · PDF by email · 30-day guarantee

Every topic, its own pageEach regulation drawn, with the explanation alongside
69 illustrated pages9 parts, from the 2382 exam to the exam-day checklist
Up-to-date sourcesBS 7671:2018+A4:2026 and the City & Guilds 2382-26 handbook
PDF by emailFormat

Look Inside the Book

Every page has one big drawing and a box with the regulation numbers, values and steps you need to know:

2382-26 for BS 7671+A4:2026: open book, on screen, BS 7671 the only reference allowed.
2382-26 for BS 7671+A4:2026: open book, on screen, BS 7671 the only reference allowed.
TN-C-S (PME): PEN split at the cut-out, typical declared Ze 0.35 Ω, broken-PEN risk
TN-C-S (PME): PEN split at the cut-out, typical declared Ze 0.35 Ω, broken-PEN risk
Overcurrent = fuse/MCB · earth leakage = RCD · both = RCBO · arc faults = AFDD
Overcurrent = fuse/MCB · earth leakage = RCD · both = RCBO · arc faults = AFDD
Table 41.1 at 230 V: TN 0.4 s / 5 s, TT 0.2 s / 1 s
Table 41.1 at 230 V: TN 0.4 s / 5 s, TT 0.2 s / 1 s
Ib ≤ In ≤ Iz and I2 ≤ 1.45 × Iz — Reg 433.1.1 drawn as three boxes
Ib ≤ In ≤ Iz and I2 ≤ 1.45 × Iz — Reg 433.1.1 drawn as three boxes
Safe zones: 150 mm from the top and corners, or in line with an accessory (522.6.202)
Safe zones: 150 mm from the top and corners, or in line with an accessory (522.6.202)
701 bathrooms to 753 heating cables: every Part 7 section on one strip of tabs
701 bathrooms to 753 heating cables: every Part 7 section on one strip of tabs
Reg 643 test order: 6 dead tests, then loop impedance, PFC, RCD, phase sequence and functional.
Reg 643 test order: 6 dead tests, then loop impedance, PFC, RCD, phase sequence and functional.

Swipe to see more →

These are real pages from the book. The table of contents is the full one: 9 parts and 65 topics.

The Problem Isn't You. It's How It Was Explained to You.

You're in the 2382 exam, the clock is running, and the question puts a socket circuit on a TT system in front of you: 0.2 seconds, 0.4, or the 1 second you half remember?

You've wired hundreds of circuits. But in the book those times sit in one table and two separate regulations, and with the timer going, the numbers start to swap places.

Overcurrent = fuse/MCB · earth leakage = RCD · both = RCBO · arc faults = AFDD

Here it's one page: Table 41.1 drawn as a grid, with regs 411.3.2.3 and 411.3.2.4 beside it. TN final circuits: 0.4 s. TT final circuits: 0.2 s. Distribution circuits: 5 s on TN, 1 s on TT.

The same goes for the fault current loop, Table 41.1, Ib ≤ In ≤ Iz, safe zones in walls and the test sequence. Each one gets its own page.

You see it, it makes sense, and you answer without flicking back through the regs in a panic.

COMPARE FOR YOURSELF

The Same Topic, Two Ways to Study It

THIS
  • The regs book: line after line of text
  • Fault paths explained only in words
  • You walk into the exam still unsure
Where automatic disconnection is the protective measure, the characteristics of the protective device and the impedance of the circuit have to be coordinated so that, should a fault of negligible impedance occur between a line conductor and an exposed-conductive-part or protective conductor, the supply is interrupted within the required time, taking account of the line conductor as far as the fault, the circuit protective conductor, the main earthing terminal, the earthing conductor, the return path outside the installation and the source itself, all of which together determine whether enough current flows.
FOR THIS
  • The fault current loop in one drawing
  • The regulation numbers in a box
  • You see it and it makes sense
TN-C-S (PME): PEN split at the cut-out, typical declared Ze 0.35 Ω, broken-PEN risk
CONTENTS

Take a Look at the 9 Parts and 65 Topics

Finding your way round BS 7671, earthing and bonding, protective devices, disconnection times and max Zs, cable sizing and voltage drop, selection and erection, special locations, inspection and testing, and an exam-day checklist: 69 pages, all illustrated.

IFinding Your Way Round BS 7671 · pp. 5-10
  1. The 2382 Exam: What It Actually Tests
  2. The Eight Parts of the Book on One Map
  3. Reading a Regulation Number: 411.3.2.2
  4. Part 2 Definitions: Where Exam Questions Hide
  5. The Appendices You Will Open Most
  6. What Changed Since the 17th, A2 and A3
IIEarthing and Bonding · pp. 11-18
  1. Why Earthing Exists: the Fault Current Path
  2. TN-S: Separate Earth from the Cable Sheath
  3. TN-C-S (PME): Combined Neutral and Earth
  4. TT: Your Own Earth Electrode
  5. Earthing Conductor and Main Earthing Terminal
  6. Main Protective Bonding: Which Pipes and What Size
  7. Extraneous or Not? The Plastic Pipe Question
  8. Supplementary Bonding: When You Can Leave It Out
IIIProtective Devices · pp. 19-26
  1. Fuse, MCB, RCD, RCBO: What Each One Protects
  2. MCB Types B, C and D
  3. RCD Types AC, A, F and B
  4. Where 30 mA RCDs Are Required
  5. AFDDs: Required or Recommended?
  6. SPDs: The Risk-Based Rule in 443
  7. Consumer Units: Non-Combustible Enclosures
  8. Isolation and Switching
IVDisconnection Times and Max Zs · pp. 27-33
  1. Table 41.1: 0.4 s, 0.2 s, 5 s, 1 s
  2. Zs = Ze + (R1 + R2)
  3. Reading the Max Zs Tables 41.2 to 41.4
  4. The 0.8 Rule: Measured vs Tabulated Zs
  5. Worked Example: Is This Radial Compliant?
  6. When Zs Is Too High: The Options
  7. Prospective Fault Current and Breaking Capacity
VCable Sizing and Voltage Drop · pp. 34-42
  1. Ib ≤ In ≤ Iz: The Three Letters
  2. Reference Methods: How the Cable Is Installed
  3. Correction Factors: Ca, Cg, Ci, Cc
  4. It ≥ In ÷ (Ca × Cg × Ci × Cc)
  5. Worked Example: Sizing a Shower Circuit
  6. Voltage Drop Limits: 3% and 5%
  7. Voltage Drop: (mV/A/m × Ib × L) ÷ 1000
  8. The Adiabatic Equation for the CPC
  9. Rings and Radials: Appendix 15
VISelection and Erection on Site · pp. 43-49
  1. Safe Zones for Cables in Walls
  2. Metal Stud Partitions
  3. Cable Support in Case of Fire
  4. Joints, Terminations and Accessibility
  5. IP Codes Explained
  6. Fire Barriers and Sealing Penetrations
  7. Identification and Labels
VIISpecial Locations (Part 7) · pp. 50-57
  1. Part 7 at a Glance: the 7xx Numbers
  2. Bathroom Zones 0, 1 and 2
  3. What Goes in Each Bathroom Zone
  4. Swimming Pools and Saunas
  5. Construction Sites: 110 V Reduced Low Voltage
  6. EV Charge Points and PME
  7. Solar PV: DC Side Basics
  8. Prosumer Installations and Batteries
VIIIInspection, Testing and Certificates · pp. 58-64
  1. The Test Sequence: Dead Before Live
  2. Ring Final Continuity: the Three Steps
  3. Insulation Resistance: 500 V and 1 MΩ
  4. RCD Testing After A2
  5. EIC, Minor Works and EICR: Which Form When
  6. EICR Codes C1, C2, C3 and FI
  7. Periodic Inspection Intervals
IXExam Day Checklist · pp. 65-69
  1. Tab Your Book Before the Exam
  2. Keywords That Point to the Right Part
  3. Time per Question
  4. Calculation Questions: the Same Order Every Time
  5. Mistakes That Come Up Most in Answers

One Page, One Topic, All Clear

Think of it this way:

You're doing an EICR and one radial reads higher than you'd like. You need to know if it's within the max Zs, and you need to know where in BS 7671 to check.

You open the page on Zs = Ze + (R1 + R2) and the loop is drawn: line out, through the fault, back along the cpc to the MET, then out to the supply. The formula sits next to the drawing, with the table number to turn to.

Ib ≤ In ≤ Iz and I2 ≤ 1.45 × Iz — Reg 433.1.1 drawn as three boxes

It works the same for bathroom zones, correction factors, RCD types, the test sequence and the EICR codes: each one on its own page.

18th Edition Wiring Regs Illustrated is 9 parts and 65 topics, all drawn, with an exam-day checklist at the end.

What you see drawn, you don't have to memorize.

What's Inside 18th Edition Wiring Regs Illustrated:

Ipp. 5-10

Finding Your Way Round BS 7671

What the 2382 exam actually tests, the eight parts of BS 7671 on one map, how to read a regulation number, the definitions, the appendices you'll use most and what has changed since the 17th.

IIpp. 11-18

Earthing and Bonding

Why earthing exists, TN-S, TN-C-S (PME) and TT drawn with the fault path, the earthing conductor and MET, main and supplementary bonding, and the plastic pipe question.

IIIpp. 19-26

Protective Devices

Fuses, MCBs, RCDs and RCBOs and what each one protects, MCB types B, C and D, RCD types, where 30 mA is required, AFDDs, SPDs, consumer units and isolation.

IVpp. 27-33

Disconnection Times and Max Zs

Table 41.1 and the 5 s / 1 s regs, Zs = Ze + (R1 + R2), the max Zs tables, the 0.8 rule, a worked radial and what to do when Zs is too high: so a high reading on an EICR stops being a guess.

Vpp. 34-42

Cable Sizing and Voltage Drop

Ib ≤ In ≤ Iz, reference methods, correction factors, a shower circuit sized step by step, voltage drop limits and the formula, the adiabatic equation, rings and radials.

VIpp. 43-49

Selection and Erection on Site

Safe zones in walls, metal stud partitions, cable support in case of fire, joints and accessibility, IP codes, fire barriers, identification and labels.

VIIpp. 50-57

Special Locations (Part 7)

The 7xx sections at a glance, bathroom zones and what goes in each, pools and saunas, 110 V on construction sites, EV charge points and PME, solar PV and batteries.

VIIIpp. 58-64

Inspection, Testing and Certificates

The test sequence, ring final continuity in three steps, insulation resistance, RCD testing, which certificate when, EICR codes C1, C2, C3 and FI and inspection intervals: so you can explain every code on the report.

IXpp. 65-69

Exam Day Checklist

Tabbing your book, the keywords that point to the right part, time per question, calculations in the same order every time, and the mistakes that come up most in answers.

At the end of the book: An exam-day checklist: tabbing your book, keywords, time per question and calculations in the same order every time.

SHOW ME WHAT'S INSIDE

Plus: 2 Free Books

18th Edition Practice Questions: Exam-Style Questions with Answers

BONUS 1: «18th Edition Practice Questions: Exam-Style Questions with Answers»

Value on its own: US$ 17.90

Practise with multiple-choice questions in the style of the open-book exam, each answer showing which part of BS 7671 to turn to, so you get quicker at finding it.

The 15 Most Common Mistakes, Before & After

BONUS 2: «The 15 Most Common Mistakes, Before & After»

Value on its own: US$ 14.90

See the errors that turn up most often on site, on certificates and in exam answers, each one drawn wrong and then right, so you don't repeat them.

18th Edition Wiring Regs Illustrated with 2 Free Books

  • 18th Edition Wiring Regs Illustrated: 69 illustrated pagesUS$ 63
  • BONUS 1: 18th Edition Practice Questions: Exam-Style Questions with AnswersUS$ 17.90
  • BONUS 2: The 15 Most Common Mistakes, Before & AfterUS$ 14.90
  • High-resolution PDF to printIncluded
Total value US$ 95.80
YOUR PRICE:
US$ 27
You save US$ 68.80
YES, I WANT 18TH EDITION WIRING REGS ILLUSTRATED FOR US$ 27

📄 This is a digital PDF book sent to your email: nothing is printed or shipped.

Secure purchaseEncrypted payment30-day guarantee

PDF by email: We email you 18th Edition Wiring Regs Illustrated as a PDF, together with the two free books. It's a single payment: no installments, no extra charges.

Who This Book Is For

You're studying for the 18th Edition

You're studying for the 18th Edition

Every topic on its own page, drawn, with the part of BS 7671 to open. You study the logic first, then you know where to find the detail.

Your exam date is booked

Your exam date is booked

The calculations always follow the same steps, and the exam-day checklist shows you how to tab the book and pace each question.

You're already on site and doing EICRs

You're already on site and doing EICRs

Max Zs, RCD types, bathroom zones and the EICR codes, drawn so you can check them quickly in the van, on paper or on your phone.

Everything You Get Today

US$ 95.80US$ 27
YES, I WANT 18TH EDITION WIRING REGS ILLUSTRATED FOR US$ 27

📄 This is a digital PDF book sent to your email: nothing is printed or shipped.

30DAYS
GUARANTEE

30-Day Guarantee

Try 18th Edition Wiring Regs Illustrated for 30 days, bonus books included.

We refund everything if the file won't open, if the book isn't what you see here, if you were charged twice or if the email doesn't arrive. Just email us.

You pay once. No subscriptions.

Frequently Asked Questions

Is it for me if I've been an electrician for 20 years and trained on the 16th or 17th Edition?

Yes. It's written for people who already do the job: short sentences, the site scene next to the regulation, and a page on what has changed since the 17th.

Where does the content come from?

From BS 7671:2018+A4:2026, the edition in force, and the City & Guilds 2382-26 qualification handbook. It isn't 17th Edition or original 2018 material: it covers what has changed up to Amendment 4. Each page gives the part, regulation or table number to look up, so you can check it in your own copy.

Is it official material?

No. It's independent study material, not published or endorsed by the IET, BSI or City & Guilds. You can't take it into the exam: the only reference allowed there is BS 7671.

Does it replace the course or training?

No. It doesn't give you a qualification, a certificate or a card: the 2382 is booked and sat through an approved centre. The book helps you understand the regs and find your way round them, alongside your course, BS 7671 and your experience on site.

Are the practice questions the real exam questions?

No. They're exam-style questions written for this book, each one showing which part of BS 7671 to turn to.

When and how does it arrive?

As a PDF by email, together with the 2 free books, to the address you enter at checkout.

Do I have to pay every month?

No. It's a one-off payment.

Can I have it on paper?

Yes, you can print the PDF at home or at a print shop. You can also read it on your phone or tablet.

How does the refund work?

You have 30 days. We refund everything if the file won't open, if the book isn't what you see on this page, if you were charged twice or if the email doesn't arrive: just email us.

Before You Close This Page

No more rereading the regs and nothing sticking.

The fault current loop, drawn on one page, and that's it.

You walk into the exam knowing where everything is in BS 7671.

Drawings make studying faster.

The book is right below.

One-time payment: US$ 27 · Guarantee: 30 days · PDF by email

YES, I WANT 18TH EDITION WIRING REGS ILLUSTRATED FOR US$ 27

📄 This is a digital PDF book sent to your email: nothing is printed or shipped.