Practice Test GeeksPart P Electrical Practice Test
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Earthing & Bonding 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 Earthing & Bonding flashcards as text

  1. What is the purpose of a visual inspection during an electrical installation inspection?

    Answer: To identify items that cannot be tested (e.g., incorrect polarity, missing bonding, damaged insulation) before electrical testing begins

    Visual inspection is the first stage of inspection and testing, identifying obvious defects, non-compliances and potential hazards before live testing, reducing the risk of test errors and ensuring safety during testing.

  2. What is the correct sequence for inspection and testing of a new installation?

    Answer: Visual inspection first, then dead testing (continuity, insulation resistance), then live testing (polarity, earth fault loop impedance, RCD tests)

    The correct sequence is: visual inspection → dead testing (continuity of CPCs and bonding, insulation resistance, polarity) → energise → live testing (polarity confirmation, Zs, PFC, RCD tests).

  3. What does an insulation resistance test verify?

    Answer: That the insulation between conductors (phase-neutral, phase-earth, neutral-earth) is sound and not breaking down, with a minimum resistance of 1 MΩ for 230 V circuits

    An insulation resistance test applies a DC test voltage (500 V for 230 V circuits) between conductors and measures the resistance; BS 7671 requires a minimum of 1 MΩ for 230 V circuits, confirming the insulation is sound.

  4. What is the test voltage used for insulation resistance testing of a 230 V circuit?

    Answer: 500 V DC

    BS 7671 Table 61 specifies that circuits with a nominal voltage up to 500 V (including 230 V domestic circuits) should be tested with a 500 V DC insulation resistance tester; the minimum acceptable value is 1 MΩ.

  5. What does a polarity test verify?

    Answer: That the phase conductor is connected to the phase terminal, the neutral to the neutral terminal, and the CPC to the earth terminal — confirming no conductors are transposed

    A polarity test confirms that phase and neutral conductors are connected to their correct terminals throughout the circuit; reversed polarity (swapped phase and neutral) can leave appliance metalwork live when the switch is off.

  6. What is a 'schedule of inspections' as part of an Electrical Installation Certificate?

    Answer: A comprehensive checklist of all inspection items examined (e.g., conductor sizing, connections, earthing, bonding) with pass/fail/not applicable recorded for each item

    The Schedule of Inspections systematically records the visual inspection findings for each required inspection item; together with the Schedule of Test Results it forms the complete documentation of the verification process.