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2391‑52City & Guilds 2391‑052 online test

Inspection and Testing Course & Mock Exams

For the City & Guilds 2391‑52 online test (2391‑052) on BS 7671:2018+A4:2026

  • 249 exam‑style questions
  • 136 references
  • 43 lessons
  • 3 mock types
  • about 7½ hours of reading

Contents

Weighted like the 60‑question test

10 modules · 43 lessons

  1. Start here: The 2391‑52 and how to pass it Read first
  2. Requirements: Purpose, legislation and preparing to inspect 6 of the 60 questions
  3. Paperwork: Certificates, reports and the A4 model forms 7 of the 60 questions
  4. Safety & kit: Safe working, safe isolation and test instruments 6 of the 60 questions
  5. Inspection: Inspection and the schedule of inspections 8 of the 60 questions
  6. Continuity: The test sequence and continuity testing 9 of the 60 questions
  7. IR & polarity: Insulation resistance, separation, polarity and earth electrodes 8 of the 60 questions
  8. Live tests: Earth fault loop impedance, fault current, RCDs and the other live tests 10 of the 60 questions
  9. EICR & codes: Periodic inspection, classification codes and the EICR 6 of the 60 questions
  10. Practical: Preparing for the 2391‑502 tasks Practical, not in the online test
Every module and its lessons
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City & Guilds 2391‑52

The 2391‑052 online test at a glance

Open book, paper copies

Questions
60
Time
2hours
Pass mark
approx. 75%
Open book
BS 7671 + OSG + GN3
Calculator
AllowedNon-programmable

Pass mark: approx. 75%

About 45 of 60. City & Guilds says it may be adjusted, so aim well above it.

What you can take in

  • BS 7671
  • IET On-Site Guide
  • IET Guidance Note 3: Inspection & Testing

Paper copies only, with tabs, highlighting and short cross-references. Check with your centre which editions to bring.

A non-programmable scientific calculator is allowed.

The practical is assessed at your centre

You also complete the 2391‑502 practical assignment at a City & Guilds approved centre, on the centre’s rig: Task A visual inspection (30 min, no books), Task B inspection and testing with the forms (2 h 30) and Task C short-answer paper (80 min). This course teaches the knowledge behind the tasks; it can’t deliver or assess them.

City & Guilds Level 3 Award in Initial and Periodic Inspection and Testing of Electrical Installations (2391‑52), Ofqual 603/1275/0. RegsReady is independent and isn’t affiliated with City & Guilds.

See inside

  1. Example lesson screen: “How the 2391-52 is assessed: the 2391-052 test and the 2391-502 assignment”, a free lesson, opening with the route to the regulation in your book.

    Read this lesson free

    Lesson

    Short, practical lessons with the route to every regulation they use.

  2. Example practice screen: an exam-style question answered correctly, with the explanation, the regulation and the route through your book.

    Practice

    Every answer explained, with the regulation and where it is in your book.

  3. Example “Find it in your book” drill: a question with no options, a 90-second clock and three ways to rate how you got on.

    Find it

    The question without options: find it in your own copy against the clock.

  4. Example mock exam screen: question 23 of 60, 20 answered and 2 flagged, with 1 h 42 min left.

    Mock

    The real format: 60 questions in 2 hours, spread like the City & Guilds test.

  5. Example mock result: 53 out of 60, 88%, a pass, in a rating plate framed by the green-and-yellow earth stripe.

    Results

    Your score by module, with every question explained, so you know what to fix.

What’s inside, weighted like the exam

City & Guilds publishes how many of the 60 questions come from each learning outcome. Every module is mapped to them, so each tab is as long as its share of the test and every full mock follows the same split. Modules marked “Practical only” teach the knowledge behind what your centre assesses.

Open a module to see its lessons. One lesson is free to read now.

  1. The 2391‑52 and how to pass it 4 lessons · 1 free to read Start hereRead this first

    How the 2391‑052 online test and the 2391‑502 practical assignment work, finding answers fast in BS 7671, GN3 and the On-Site Guide, what Amendment 4 changed for inspectors, and a four-week study plan.

    1. How the 2391‑52 is assessed: the 2391‑052 test and the 2391‑502 assignment Free lesson
    2. Full course: Your three books: finding answers fast in BS 7671, GN3 and the On-Site Guide 10 min
    3. Full course: What Amendment 4 changed for inspectors 10 min
    4. Full course: A four-week study plan 9 min
  2. Purpose, legislation and preparing to inspect 4 lessons Requirements6 questions of the exam

    Why and when installations are inspected and tested, initial verification compared with periodic inspection, the statutory and non-statutory documents (EAWR, BS 7671, GN3, GS38), rented property, and agreeing extent, limitations and sampling.

    1. Full course: Initial verification and periodic inspection: purpose and process 10 min
    2. Full course: Why and when installations are inspected: reasons, frequency and rented property 10 min
    3. Full course: Statutory and non-statutory documents: HSWA, EAWR, BS 7671, GN3 and GS38 11 min
    4. Full course: Before you start: information, extent, limitations and sampling 11 min
  3. Certificates, reports and the A4 model forms 4 lessons Paperwork7 questions of the exam

    Choosing between the EIC, MEIWC and EICR, the signatories and their responsibilities, completing the schedules of circuit details and test results, and issuing, recording and retaining documents.

    1. Full course: EIC, MEIWC or EICR: choosing the right document 10 min
    2. Full course: Signatories and responsibilities: design, construction, inspection and testing 10 min
    3. Full course: Completing the schedules of circuit details and test results 11 min
    4. Full course: Issuing, recording and retaining documents 10 min
  4. Safe working, safe isolation and test instruments 4 lessons Safety & kit6 questions of the exam

    Electricity at Work Regulations duties when inspecting and testing, safe isolation step by step, GS38 probes, leads and voltage indicators, and test instruments: BS EN 61557, calibration and checks before use.

    1. Full course: Health and safety duties when inspecting and testing (EAWR regs 4, 12, 13, 14 and 16) 11 min
    2. Full course: Safe isolation, step by step, and what happens when it's skipped 11 min
    3. Full course: GS38: probes, leads, fuses and voltage indicators 10 min
    4. Full course: Test instruments: BS EN 61557, calibration and checks before use 11 min
  5. Inspection and the schedule of inspections 5 lessons Inspection8 questions of the exam

    Inspection before testing, working through the schedule of inspections, using your senses and recording outcomes, IP codes and external influences, and special locations and prosumer installations on the schedule.

    1. Full course: Inspection before testing: what Section 642 requires 9 min
    2. Full course: Working through the schedule of inspections (EIC Section H and the EICR schedule) 12 min
    3. Full course: Using your senses and recording outcomes (✓, C1/C2, C3, FI, N/V, LIM, N/A) 10 min
    4. Full course: IP codes and external influences 10 min
    5. Full course: Bathrooms, other special locations and prosumer installations on the schedule 10 min
  6. The test sequence and continuity testing 5 lessons Continuity9 questions of the exam

    The initial verification test sequence and why the order matters, continuity of protective and bonding conductors, the three-step ring final circuit test, and reading continuity results.

    1. Full course: The initial verification test sequence and why the order matters 9 min
    2. Full course: Continuity of protective conductors: R1+R2 and wander-lead methods 11 min
    3. Full course: Main and supplementary bonding conductors 10 min
    4. Full course: Ring final circuit continuity: the three-step test 12 min
    5. Full course: Nulling, length, temperature and parallel paths: reading continuity results 9 min
  7. Insulation resistance, separation, polarity and earth electrodes 4 lessons IR & polarity8 questions of the exam

    Insulation resistance testing and Table 64, SPDs and sensitive equipment, SELV, PELV and electrical separation, polarity, and earth electrode resistance testing on TT systems.

    1. Full course: Insulation resistance testing and Table 64 11 min
    2. Full course: SPDs, sensitive equipment and separated circuits (SELV, PELV, electrical separation) 10 min
    3. Full course: Polarity testing 9 min
    4. Full course: Earth electrode resistance testing on TT systems 10 min
  8. Earth fault loop impedance, fault current, RCDs and the other live tests 5 lessons Live tests10 questions of the exam

    Measuring Ze and Zs safely, checking Zs against the Chapter 41 values, prospective fault current, RCD testing and RCD types, phase sequence, functional testing and voltage drop.

    1. Full course: Measuring Ze and Zs safely 11 min
    2. Full course: Is Zs acceptable? Chapter 41 values, temperature and the 0.8 rule of thumb 11 min
    3. Full course: Prospective fault current (prospective short-circuit and earth fault current) 10 min
    4. Full course: RCD testing and RCD types 11 min
    5. Full course: Phase sequence, functional testing and voltage drop 10 min
  9. Periodic inspection, classification codes and the EICR 4 lessons EICR & codes6 questions of the exam

    Testing an existing installation, classification codes C1, C2, C3 and FI after Amendment 4, dealing with unsatisfactory items, the overall assessment and the next inspection date.

    1. Full course: Testing an existing installation: which tests and how to adapt them 11 min
    2. Full course: Classification codes C1, C2, C3 and FI after Amendment 4 11 min
    3. Full course: Unsatisfactory items: put right before certifying at initial verification, code and report at periodic inspection 10 min
    4. Full course: Overall assessment, observations and the next inspection date 10 min
  10. Preparing for the 2391‑502 tasks 4 lessons PracticalPractical only, not in the online test

    The knowledge behind the 2391‑502 practical assignment, which is assessed at your centre: spotting defects without your books, a safe test routine, completing the A4 forms and answering short-answer questions.

    1. Full course: Task A: spotting defects without your books 11 min
    2. Full course: Task B: a safe, methodical routine on the test rig 12 min
    3. Full course: Task B: completing the A4 forms accurately 11 min
    4. Full course: Task C: answering short-answer questions well 10 min

The whole paper 60 questions

City & Guilds publishes how many questions come from each learning outcome. Where an outcome spans several modules, the split between them is ours.

Mock exams, as many as you like

Each paper is spread across the learning outcomes like the real 2391‑52 test. The strip on each card is that paper, one block per question.

The real format

60questions · 2 hours

Full mock (2391‑052 format)

60 questions in 2 hours, spread across the four learning outcomes the same way as the City & Guilds 2391‑052 test.

  • Timed
  • Answers at the end
  • Flag and review

30questions · 1 hour

Half mock

30 questions in 1 hour, at the same 2 minutes a question and the same pass mark. For when you can’t spare two hours.

  • Timed
  • Answers at the end
  • Flag and review

20questions · 30 min

Speed round

20 questions in 30 minutes: faster than the real test, to build lookup speed across your three books.

  • Timed
  • Answers at the end
  • Flag and review

Plus topic practice for every module, Smart review, a missed-questions drill, the “Find it in your book” drill and an Amendment changes drill.

Example readiness score of 72 out of 100, “Nearly there”: exam ready needs 80 or more and a passed full mock.

A readiness score that doesn’t flatter you

We don’t call you exam ready until your score is 80 or more and your latest full 60‑question mock is a pass. The real pass mark is approx. 75%, so you go in with a margin.

Guides for the 2391‑52

All guides

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