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Question 1 of 9
1. Question
For the work stated in the scenario:
State giving reasons, the documentation to be completed q676
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Question 2 of 9
2. Question
List 1 statutory and 3 non statutory documents that may need to be consulted during the inspection and testing process q677
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Question 3 of 9
3. Question
The continuity of protective conductors including main and supplementary bonding is to be confirmed.
Describe briefly, an appropriate test method to confirm continuity of the main equipotential bonding. q678
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Question 4 of 9
4. Question
Describe briefly, an alternative method to the previous question to confirm continuity of cpc of the newly installed water heater circuit. q679
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Question 5 of 9
5. Question
Draw a fully labelled diagram of the main earthing terminal located below the main distribution board for the installation. q680
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Question 6 of 9
6. Question
List the five essential tests that are required following the addition of the new luminaire on circuit L2-2, stating the instrument in each case. q681
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Question 7 of 9
7. Question
An insulation resistance test between line and earth on individual circuits of the installation produced the following results.
2.2 MΩ, 100 MΩ , 100 MΩ, 50 MΩ, 100 MΩ, 100 MΩ
Determine the overall expected value between all circuits joined together and earth, show all calculations. q682
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Question 8 of 9
8. Question
Explain briefly giving reasons, whether the installation meets the requirements of BS7671. There are four circuit at 100M ohm which is the equivalent of one at 25M ohm.
Product / Sum of 25 and 50 is 1250 / 75 = 16.667
Product / Sum of 16.667 and 2.2 is 36.667 / 18.867 = 1.94 M ohms
The installation does comply BS 7671 as all circuits are individually above 1M ohm. The value of 2.2M is much lower than what would be expected and could indicate a latent fault requiring further investigation and should be recorded as such. q683
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Question 9 of 9
9. Question
Describe the relevant functional tests for each circuit within the installation. q684
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