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Question 1 of 14
1. Question
A test of ring final circuit continuity is to be carried out on a ring final circuit in the office. The diagram shown in can be used for reference when answering this question.
State the instrument to be used to carry out this test
q888
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Question 2 of 14
2. Question
State the conductors between which conductors the tests are carried out for each step of Stage 1 of the test q889
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Question 3 of 14
3. Question
State which pairs of conductors are linked together for Stage 2 of the test q890
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Question 4 of 14
4. Question
State how the Stage 2 of the ring final circuit continuity test is carried out once the correct connections are made in the previous question q891
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Question 5 of 14
5. Question
State which pairs of conductors are linked together for Stage 3 of the test q892
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Question 6 of 14
6. Question
State how Stage 3 of the ring final circuit continuity test is carried out once the correct connections are made in the previous question q893
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Question 7 of 14
7. Question
State all the test results which would be recorded following the completion of the test of ring final circuit continuity q894
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Question 8 of 14
8. Question
State, giving two reasons, whether or not a sampled periodic inspection would be acceptable for the installation in the workshop and production areas.
Your answers should reflect the information given in the scenario q895
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Question 9 of 14
9. Question
State, giving two reasons, whether or not a sampled periodic inspection would be acceptable for the socket-outlet circuits in the office area
Your answers should reflect the information given in the scenario q896
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Question 10 of 14
10. Question
A radial circuit is installed to supply a 3.6 kW motor located adjacent to the assembly area is 22 m from the DB. All the circuit conductors have a CSA of are 2.5 mm2. The resistance of the conductor is 0.007 Ω/m at 20°C
Calculate the expected measured resistance value of R1 + R2 for the radial circuit q897
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Question 11 of 14
11. Question
The maximum tabulated BS 7671 earth fault loop impedance for a type B 16 A, circuit breaker is 2.73 Ω for this circuit. Calculate the maximum acceptable measured earth fault loop impedance for the circuit. q898
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Question 12 of 14
12. Question
State, giving reasons, whether or not the radial circuit complies with earth fault loop impedance requirements of BS 7671 when Ze is 0.2 Ω q899
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Question 13 of 14
13. Question
Identify, in the correct sequence, starting from the fault and using the letter on the diagram below, those components which make up the complete earth fault loop for the installation
q900
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Question 14 of 14
14. Question
State the correct technical name for each of the marked components in the earth fault path given in the previous question q901
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