C&G 2391-52 study plan

Map every stage of the verification and periodic process to its legal and standard source (HSWA, EAWR, BS 7671 Parts 6 and 7, associated guidance notes) in a single reference table you write yourself

Write out and rehearse a full safe isolation procedure from origin to final circuit, including identifying the point of isolation, locking off, proving the voltage indicator on a known source before and after the test, and applying a warning notice

List the documents and information you must obtain and check before starting work (previous certificates, schedules, extent and limitations, authorisation to isolate) and state who authorises isolation and re-energisation

Distinguish, with three worked examples, what falls inside initial verification versus periodic inspection, and where the boundary of a periodic scope can legitimately stop

Work through every heading of the schedule of inspections and state the specific checks required under each for a domestic consumer unit replacement

Order the inspection activities so that all dead inspection is completed before any live testing begins, and justify each ordering decision

Identify the 10 most common non-compliances found on a domestic installation and state where each is cited in BS 7671

Decide, for eight given site findings, whether each is a departure, a non-compliance, or acceptable, and write the reason in one sentence

Carry out and record the continuity tests: protective conductor continuity, main and supplementary protective bonding continuity, ring final circuit continuity (all three steps), and radial r1 and r2

Calculate expected R1+R2 from conductor resistance tables before measuring, then compare the calculated and measured values and explain any difference greater than 0.05 ohm

Perform insulation resistance tests at 500 V DC on a whole installation and on a single circuit, applying the correct procedure where SPDs, surge protection or voltage-sensitive equipment are present

Judge insulation resistance results against the 1 megohm minimum and the permitted reduced test voltage case, recording test voltage, duration and any disconnections

Determine earth fault loop impedance by direct measurement and by calculation from Ze plus R1+R2, and reconcile the two figures

Measure or establish Ze and earth electrode resistance, selecting the correct method (three-point, clamp, or calculated) for the electrode arrangement given

Verify measured or calculated Zs against the disconnection times in the relevant tables for the protective device fitted, including the 0.8 rule for conductor operating temperature

Carry out a full RCD test sequence on a 30 mA Type A device: half rated current, rated current, five times rated current, and the correct test for DC sensitivity, then record every operating time and pass/fail verdict

Confirm the functional test of the RCD test button and state what it does and does not prove

Justify a sample size for a periodic inspection of a given multi-board premises using the applicable sampling guidance, and state what you would do if the sample reveals a widespread defect

Write an extent of works and limitations statement for a periodic inspection where no previous records exist and some areas are inaccessible

Assign C1, C2, C3 or FI to fifteen given observations with a written justification for each code

Re-run the schedule of inspections against an existing installation with no prior certification and note where the checks differ from a new installation

Complete a full electrical installation certificate, a minor works certificate and a schedule of test results for a sample job, with no section left blank or marked not applicable without reason

Cross-check recorded results against expected values and flag every anomaly that would require re-testing before the certificate is issued

Classify ten supplied observations into codes and rank them into a prioritised remedial action list with indicative timescales

Write a plain-English client letter explaining a C2 observation, the danger it presents, and the required remedial action, without jargon

Sit a full-length timed mock covering the four highest-weighted testing and reporting domains and mark it against the answers

Re-study every question missed, writing the correct reasoning in your own words rather than copying the answer

Re-perform, on the rig or in simulation, the two test procedures you scored lowest on in the mock

Build a personal one-page formula and limits sheet for Zs, RCD times and insulation resistance values and check it against source text

Sit a second full-length timed mock under exam conditions and compare the score profile against week 7

Rehearse the safe isolation sequence and the inspection-before-test sequence from memory, out loud, without prompts

Complete two full certificates from blank templates within a strict time limit

List your five weakest remaining topics and write a one-paragraph accurate summary of each from memory