BS 7671 18th Edition Practice Questions
Free BS 7671:2018 Amendment 2 practice questions for UK electricians. 5,000+ 18th Edition Wiring Regs questions with mock C&G 2382-22 papers, adaptive drilling and explanations referencing the exact regulation.
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What the 18th Edition exam actually covers
The C&G 2382-22 (and equivalent EAL) assessment is an online, open-book test on BS 7671:2018 Amendment 2 (2022). 60 questions, 2 hours, 60% pass mark. It looks easy because it's open-book — and then candidates burn 90 seconds per question hunting through the Big Brown Book and run out of time.
The candidates who pass first time are the ones who already know the layout cold: where Table 41.3 lives, what part Special Installations sit in, which page has the colour identification tables. Voltly drills you on the same 200 regulations the exam loves to ask about, until lookups become instinct.
Voltly's BS 7671 question bank
- BS 7671:2018+A2:2022 — every question reflects Amendment 2 including SPD, AFDD and EV charging requirements.
- Full chapter coverage — Parts 1–8, common Appendices, and Special Installations (Sections 700–series) including EV (722) and PV (712).
- Calculations — earth fault loop impedance, design current, voltage drop, Cmin/Cmax, adiabatic equation.
- Inspection and testing — GN3 sequence, continuity, IR, polarity, Zs, RCD timing, EICR coding.
- Mock 2382-22 papers — 60-question, 2-hour timed exams that mirror the real format.
- Weak-point drilling — every miss flags the regulation so the adaptive engine re-serves it until you nail it.
Built for the way UK sparks actually study
Voltly is a mobile-first PWA. You can drill 18th Ed questions in a van between jobs, on the tube, or in front of the telly. The streak system rewards 10 minutes a day — far more useful than the once-a-month 4-hour cram that most apprentices try and fail with. By the time you sit the real 2382-22, you'll have already passed two dozen mock exams.
5 free sample questions
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Q1.Per BS 7671, the maximum permitted Zs for a 32 A Type B circuit breaker on a TN-S system is:+
- 0.55 Ω
- 0.72 Ω
- 1.10 Ω
- 1.44 Ω ✓ correct
Why: BS 7671 Table 41.3 — 32 A Type B MCB Zs(max) = 1.44 Ω at 230 V, Uo.
Q2.Disconnection time for a final circuit ≤ 32 A on a 230 V TN system must not exceed:+
- 0.1 s
- 0.2 s
- 0.4 s ✓ correct
- 5.0 s
Why: BS 7671 Table 41.1 — 0.4 s for TN final circuits ≤ 32 A at Uo = 230 V.
Q3.Per Amendment 2 (2022), socket outlets rated up to 32 A in dwellings shall additionally be protected by:+
- SPD
- AFDD ✓ correct
- RCBO Type A
- Isolating transformer
Why: Regulation 421.1.7 (A2:2022) — AFDDs recommended/required for certain final circuits in higher-risk premises and HMOs; coursework treats this as the AFDD answer.
Q4.Minimum insulation resistance for a 230 V final circuit tested at 500 V DC:+
- 0.25 MΩ
- 0.5 MΩ
- 1.0 MΩ ✓ correct
- 2.0 MΩ
Why: BS 7671 Table 64 — minimum 1.0 MΩ at 500 V DC for LV circuits up to 500 V.
Q5.The colour identification for a single-phase neutral conductor in a fixed installation is:+
- Brown
- Blue ✓ correct
- Black
- Grey
Why: BS 7671 Table 51 — neutral identification is blue for single-phase LV installations.
FAQ
What's covered in the 18th Edition exam?+
BS 7671:2018 Amendment 2 (2022) — fundamental principles, definitions, assessment of general characteristics, protection for safety, selection and erection of equipment, inspection and testing, and special installations including EV charging and PV.
Is Voltly's BS 7671 content up to date with Amendment 2?+
Yes — every question reflects BS 7671:2018+A2:2022, including the new requirements for surge protection devices (SPDs), arc fault detection (AFDDs) and EV charging installations.
Can I use Voltly for the City & Guilds 2382-22?+
Yes — Voltly's 18th Edition bank maps directly to the C&G 2382-22 syllabus. Calculations and code-lookup questions are styled to match the online exam format.
Do you cover initial verification (2391)?+
Yes — separate categories for inspection sequence, continuity testing, insulation resistance, polarity, earth fault loop impedance and RCD testing per GN3.
Free plan?+
50 BS 7671 questions per day, free forever. Premium unlocks unlimited plus offline mode and full mock papers.