2391 Prep BlogCity & Guilds 2391-52 Inspection & Testing Exam Prephttps://www.2391prep.co.uk/en-gbZe, Zs, PFC and PSCC: What Each Test Measures and Wherehttps://www.2391prep.co.uk/blog/loop-impedance-and-pfc-assessment-tips-prospective-fault-cur/https://www.2391prep.co.uk/blog/loop-impedance-and-pfc-assessment-tips-prospective-fault-cur/Where Ze, Zs, PFC and PSCC are measured, the maximum values for TN-S, TN-C-S and TT, and the safe isolation the live tests demand.Fri, 21 Aug 2026 00:00:00 GMTtestingearth-fault-loop-impedanceprospective-fault-currenttest-proceduresEIC, Minor Works or EICR: Which Document Do You Issue?https://www.2391prep.co.uk/blog/eic-meiwc-or-eicr-which-document/https://www.2391prep.co.uk/blog/eic-meiwc-or-eicr-which-document/The test that decides between an Electrical Installation Certificate, a Minor Works Certificate and a Condition Report — and the schedules each needs.Sat, 25 Jul 2026 00:00:00 GMTcertificationEICRdocumentationEICR Coding Explained: C1, C2, C3 and FIhttps://www.2391prep.co.uk/blog/eicr-coding-c1-c2-c3-fi/https://www.2391prep.co.uk/blog/eicr-coding-c1-c2-c3-fi/How to choose between the four EICR classification codes, why C3 never makes a report unsatisfactory, and the one question that settles most coding decisions.Sat, 25 Jul 2026 00:00:00 GMTfault codingEICRperiodic inspectionHow to Revise for the 2391-52 Without Wasting Weekshttps://www.2391prep.co.uk/blog/how-to-revise-for-2391-52/https://www.2391prep.co.uk/blog/how-to-revise-for-2391-52/A revision plan for the City & Guilds 2391-52 — how to split open and closed book practice, what the exam weighting tells you, and where marks are lost.Sat, 25 Jul 2026 00:00:00 GMTrevisionexam preparationmock examSafe Isolation and GS38: Prove, Test, Provehttps://www.2391prep.co.uk/blog/safe-isolation-gs38-prove-test-prove/https://www.2391prep.co.uk/blog/safe-isolation-gs38-prove-test-prove/The prove–test–prove sequence, GS38 requirements for probes and leads, why a multimeter is the wrong instrument, and how CAT ratings work.Sat, 25 Jul 2026 00:00:00 GMTsafe isolationGS38test equipmentThe BS 7671 Test Sequence, and Why the Order Mattershttps://www.2391prep.co.uk/blog/test-sequence-order-and-why/https://www.2391prep.co.uk/blog/test-sequence-order-and-why/The dead and live test sequence from Regulation 643.1 in order, with the reason each test comes where it does — and the reordering mistakes that cost marks.Sat, 25 Jul 2026 00:00:00 GMTtest proceduresinitial verificationBS 7671