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Inspection & Testing Flashcards

6 cards from real PART P practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Inspection & Testing flashcards as text

  1. What is the difference between a 'satisfactory' and 'unsatisfactory' overall EICR result?

    Answer: Satisfactory means no C1 or C2 codes were found (C3 codes are acceptable); unsatisfactory means one or more C1 or C2 codes are present requiring remedial action

    An EICR is overall unsatisfactory if it contains any C1 (immediate danger) or C2 (potentially dangerous) observations; C3 (improvement recommended) codes do not make an installation unsatisfactory but should be actioned.

  2. What test is used to verify that a 30 mA RCD will trip within 40 ms?

    Answer: Apply 5 × IΔn (150 mA) using a calibrated RCD tester and measure the time taken to trip

    The maximum disconnection time test uses 5 × IΔn (5 × 30 = 150 mA) applied by the RCD tester; the RCD must trip within 40 ms. A second test at 1 × IΔn (30 mA) confirms it trips at its rated sensitivity.

  3. What is the purpose of a visual check of conductor connections during inspection?

    Answer: To identify loose, incorrectly terminated, corroded or inadequate connections that could cause overheating, arcing or high-resistance faults

    Visual inspection of connections identifies termination issues (loose screws, strands outside the terminal, incorrect ferrules) that are a common cause of overheating, arcing and fire, which no electrical test alone would detect.

  4. What action should an inspector take if they find a C1 (immediate danger) during an EICR?

    Answer: Immediately advise the client and, if possible with the client's agreement, make the dangerous item safe (isolate, disconnect) before leaving the premises

    A C1 indicates immediate danger to life; the inspector must advise the client immediately and, with their consent, make the installation or the specific item safe before leaving, in addition to recording it on the EICR.

  5. What is 'voltage indicator' and why must it be approved to GS38?

    Answer: A voltage testing device (test lamp or two-pole tester); GS38 specifies requirements for test probes and leads to prevent injuries from arcing faults during live testing

    GS38 (HSE guidance) specifies requirements for electrical test probes and leads used by electricians, including insulated probe tips, shrouded crocodile clips and limited exposed metal, to reduce the risk of injury from accidental short circuits during live working.

  6. What does 'Phase rotation test' verify in a three-phase installation?

    Answer: That the sequence of phases (L1, L2, L3) is correct, ensuring motors connected to the supply rotate in the correct direction

    A phase rotation (sequence) test confirms the order of the three phases (L1, L2, L3) is correct; incorrect phase sequence causes three-phase motors to rotate in the wrong direction, potentially damaging machinery.