How to pass the 18th edition wiring regulations exam

The 18th Edition Wiring Regulations Exam (BS 7671:2018) is essential for electricians, contractors, and anyone working with electrical installations in the UK. The qualification demonstrates familiarity with the national standard for wiring, covering safety, design, and compliance. While the exam can seem daunting, it is an open-book assessment, meaning you’re allowed to use a copy of the regulations during the test. Success depends less on memorising the entire book and more on knowing where and how to find the right information quickly.

1. Understand the Exam Structure

The exam typically consists of 60 multiple-choice questions to be completed in two hours. All questions are based on the content of the IET Wiring Regulations (BS 7671:2018, including Amendment 2). You will not be asked to recall details word-for-word; instead, the exam tests your ability to navigate the book and interpret requirements correctly.

The questions are divided across sections such as:

  • Part 1: Scope, object, and fundamental principles
  • Part 2: Definitions
  • Part 4: Protection for safety
  • Part 5: Selection and erection of equipment
  • Part 6: Inspection and testing
  • Part 7: Special installations or locations
  • Appendices

2. Get Familiar with the Book Layout

Your main tool is the blue book (BS 7671:2018). Passing the exam depends on how quickly you can locate relevant sections. You should:

  • Learn where each part begins and ends.
  • Use tabs or sticky notes to mark key sections (ensure they’re non-intrusive and allowed by your test centre).
  • Familiarise yourself with the index and contents pages. Many candidates waste time flipping pages when the index can take them directly to the right regulation number.
  • Practice reading regulation numbers. Each has a structure (e.g., 411.3.2) that tells you its part, chapter, and section. Recognizing these patterns speeds up navigation.

3. Practice Using Past Papers and Mock Exams

You should practice answering mock questions under timed conditions. This builds confidence in:

  • Interpreting questions correctly.
  • Finding answers quickly in the book.
  • Managing time so you don’t spend too long on one question.

Many training providers supply practice exams, and there are also apps and online quizzes designed specifically for the 18th Edition.

4. Focus on Key Areas Commonly Tested

Certain sections of the book are heavily emphasized in exams, such as:

  • Protective devices and disconnection times (Chapter 41).
  • Earthing arrangements and bonding.
  • Inspection and testing procedures (Part 6).
  • Special installations like bathrooms, EV charging points, and medical locations (Part 7).
  • Appendices (especially tables for cable sizing, correction factors, and maximum disconnection times).

By practicing these areas, you’ll be well-prepared for common question themes.

5. Develop a Search Strategy

Because the exam is open book, the skill you need is search efficiency. A proven approach is:

  1. Read the question carefully and highlight the keywords (e.g., “bathroom,” “RCD protection,” “buried cables”).
  2. Go straight to the relevant Part or Appendix.
  3. Use the index if unsure where to start.
  4. Double-check that the regulation you find directly addresses the question—sometimes similar rules exist for different situations.

6. Time Management Techniques

Two hours for 60 questions means you have about two minutes per question. Some tips:

  • Don’t get stuck—if a question is difficult, skip it and return later.
  • Answer the easier questions quickly to build confidence and bank marks.
  • Leave time at the end to review flagged questions.

7. Training and Preparation Courses

While self-study is possible, most candidates benefit from a short training course (online or classroom). These courses guide you through book navigation, highlight key amendments, and provide structured practice.

8. Exam Day Tips

  • Bring the correct edition of the book (Amendment 2, 2022). Older editions may not match the exam content.
  • Stay calm—remember the exam is about finding, not memorizing.
  • Read every question carefully; some are designed to test attention to detail.

Conclusion

Passing the 18th Edition Wiring Regulations Exam is less about rote memorisation and more about efficient navigation and interpretation. By familiarising yourself with the layout of BS 7671, practicing mock questions, and honing your search strategy, you’ll build both speed and confidence. With preparation, the open-book format becomes an advantage rather than a challenge, helping you succeed on exam day and apply safe practices in real-world electrical work.