ADL 2391 Revision Questions 2 1003.pdf

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Question 26 Identify the THREE electrodes used when used with a proprietary earth resistance tester GN3 Page 50 2.7.13 (Earth electrode resistance) 1. Main electrode 2. Potential electrode (auxiliary electrode) 3. Current electrode (auxiliary electrode) Note: This method can be use for electrodes used for transformers, lightning protection systems etc.
Question 27 State the action to be taken regarding the earthing conductor before measuring the resistance of an earth electrode GN3 Page 52 2.7.13 (Earth electrode testing) 1. Disconnect earthing conductor at MET to avoid parallel earth paths 2. Do NOT disconnect any protective conductors before isolating the supply
Page 1 and 2: Question 1 State the necessary acti
Page 3 and 4: Question 3 Why is it necessary to u
Page 5 and 6: Question 5 Identify FIVE non-statut
Page 7 and 8: Question 7 Appendix 6 of BS 7671 al
Page 9 and 10: Question 9 State the information th
Page 11 and 12: Question 10 Where should the propos
Page 13 and 14: Question 12 State in the correct se
Page 15 and 16: Question 14 State the British Stand
Page 17 and 18: Question 16 Identify the TWO proced
Page 19 and 20: Question 17 cont’d GN3 Page 33 (C
Page 21 and 22: Question 19 Identify ONE other test
Page 23 and 24: Question 21 State the test voltage
Page 25 and 26: Question 23 State the type of test
Page 27: Question 25 Identify the test that
Page 31 and 32: Question 28 State the maximum recom
Page 33 and 34: Question 30 State TWO reasons why i
Page 35 and 36: Question 32 Determine the prospecti
Page 37 and 38: Question 34 State the three require

ADL 2391 Revision Questions 2 1003.pdf

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