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Question 1 of 60

1. Question
What is the main purpose of an Initial Verification?
- To complete the testing and issue an Electrical Installation Certificate.
- To make a judgement that the installation is safe for continued use.
- To confirm an installation is safe to be put into service.
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Question 2 of 60

2. Question
What situation requires the issuing of a Minor Electrical Installation Works Certificate?
- An additional lighting circuit has been installed
- Changing a consumer unit and protective devices.
- Upgrading the cable and circuit breaker for a shower circuit.
- Additional socket-outlets added to an existing ring final circuit.
Correct

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Question 3 of 60

3. Question
Which statutory document contains specific information relevant to Initial Verification?
- The Electricity at Work Regulations.
- Health and Safety guidance GS38.
- The Health and Safety at Work Act.
- BS 7671, Requirements for Electrical Installations.
Correct

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Question 4 of 60

4. Question
What is the minimum voltage which requires the test leads and probes to comply with GS38?
- 25VAC.
- 50VAC.
- 120 V AC.
- 150 V AC.
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Question 5 of 60

5. Question
How many voltage measurements are required to confirm that a three-phase four-wire installation is safely isolated?
- 3
- 6
- 9
- 10
Correct

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Question 6 of 60

6. Question
What precaution is required before carrying out a test of external earth fault loop impedance (Ze) so as to avoid danger to users of an installation?
- Lock off the supply.
- Use insulated screwdrivers.
- Warn the occupier of the premises.
- Disconnect the main protective bonding conductors.
Correct

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Question 7 of 60

7. Question
Why does BS 7671 require inspection to be carried out before testing?
- To confirm the installers have installed as per the job specification.
- To confirm all the equipment is connected to the installation will work.
- To confirm the installation is complete and it is safe to commence testing.
- To confirm the Earthing Conductor is connected and it is safe to commence testing.
Correct

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Question 8 of 60

8. Question
Which situation will not require a label stating, ‘Safety Electrical Connection – Do Not remove’?
- Connecting a bonding conductor to a metallic installation gas pipe.
- An Earthing conductor connected to an installation earth electrode.
- A supplementary bonding conductor connected to a metallic water pipe.
- The connection to a Main Earthing Terminal within a consumer unit.
Correct

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Question 9 of 60

9. Question
What must be checked when inspecting a consumer unit for compliance with Basic Protection requirements?
- All cable terminations are tight.
- Enclosures meet the IP requirements.
- Live conductors are correctly identified
- Live conductors are correctly identified
Correct

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Question 10 of 60

10. Question
Which two senses are used when inspecting the terminations at a newly installed motor?
- Sight and hearing.
- Sight and smell.
- Touch and smell.
- Touch and sight.
Correct

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Question 11 of 60

11. Question
What action must be taken when a loose connection is found to a pipe during the inspection of a main protective bonding conductor termination?
- The defect must be made good and inspected before certification.
- A defect report must accompany the Electrical Installation Certificate.
- The continuity test between the MET and the pipe should be carried out.
- A note is made on the Electrical Installation Certificate under ‘Departures’.
Correct

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Question 12 of 60

12. Question
What best describes the protection offered by IPXXB?
- Protection against access to live parts.
- Protection against the ingress of solids.
- Protection against the ingress of water.
- Protection against impact.
Correct

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Question 13 of 60

13. Question
What is the minimum IP rating for electrical equipment installed in Zone 2 of a bathroom?
- IP 2X
- IP X2
- IP 4X
- IP X4
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Question 14 of 60

14. Question
The calibration of an Earth Fault Loop Impedance tester reveals that the instrument is outside of specification. Regular accuracy checks on the instrument have not been carried out for six months.

What immediate action must be taken by the contractor?
- The last installation tested should be retested.
- The test leads for this instrument must be replaced.
- All installations tested in the last three months should be retested.
- All installations tested since the last calibration should be checked.
Correct

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Question 15 of 60

15. Question
What instrument would give the most accurate results when carrying out an earth electrode resistance test?
- A low-resistance ohmmeter.
- An earth fault loop impedance tester.
- A three or four-terminal earth electrode tester.
- A stakeless or probe type earth electrode tester.
Correct

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Question 16 of 60

16. Question
Why does BS 7671 give a defined sequence of tests when carrying out Initial Verification?
- To ensure all tests are carried out.
- To ensure the Schedule of Test Results is complete.
- To ensure live tests are carried out in the correct order.
- To ensure the safety of the person carrying out the tests.
Correct

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Question 17 of 60

17. Question
Which test method is used to verify that extraneous conductive parts of an installation are effectively connected to the MET?
- Long lead test.
- R1+R2 linked test.
- Applied voltage test.
- Applied current test.
Correct

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Question 18 of 60

18. Question
What is the main purpose of verifying that extraneous conductive parts of an installation are effectively connected to the MET?
- To confirm that they provide a reliable path for fault currents to flow to earth.
- To confirm that there is a reliable connection between the MET and the means of earthing.
- To confirm that they will reduce values of earth fault loop impedance to comply with BS7671.
- To confirm that only a low potential will exist between exposed and extraneous conductive parts under fault conditions.
Correct

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Question 19 of 60

19. Question
Where on a lighting circuit would a test of continuity of protective conductors be carried out?
- At the distribution board
- At every light and switch point.
- At the furthest point in the circuit
- At every light and each switch with a metallic plate.
Correct

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Question 20 of 60

20. Question
What would cause the value of r2 to be higher than r1 and rn when carrying out step 1 of a continuity of ring-final circuit test?
- A spur in the ring.
- A connected load.
- Parallel earth paths.
- Smaller sized cpc.
Correct

Incorrect
Question 21 of 60

21. Question
What is the test voltage for an insulation resistance test carried out on a 230 V circuit containing socket-outlets with surge protection devices which cannot be removed?
- 100 V DC.
- 250 V DC.
- 500 V DC.
- 1000 V DC.
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Question 22 of 60

22. Question
During the construction of an installation, insulation resistance tests have been carried out between live conductors and earth on the individual circuits and the L to E results are shown below.

What is the expected value of insulation resistance L to E when the whole installation is tested?

Circuit No L-E in MΩ

1 120

2 120

3 130

4 150
- 0.03 MΩ.
- 32.2 MΩ
- 136.7 MΩ
- 520 MΩ
Correct

Incorrect
Question 23 of 60

23. Question
Questions 23 to 25 relate to the following scenario:

The conductors of a newly installed ring final circuit are to be tested for continuity. The circuit is wired in PVC single core cables contained in PVC conduit. All circuit conductors are 2.5mm2 and the end to end length of each loop is 75m.

What action is required regarding the instrument test leads?
- They are nulled or zeroed.
- They must be GS 38 compliant.
- They must be auto-ranging
- They must be 13 A rated.
Correct

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Question 24 of 60

24. Question
Questions 23 to 25 relate to the following scenario:

The conductors of a newly installed ring final circuit are to be tested for continuity. The circuit is wired in PVC single core cables contained in PVC conduit. All circuit conductors are 2.5mm2 and the end to end length of each loop is 75m.

What is the expected resistance of each of the loops tested in stage 1 as shown in GN3?
- 0.14 Ω
- 0.56 Ω
- 0.68 Ω
- 1.01 Ω
Correct

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Question 25 of 60

25. Question
Questions 23 to 25 relate to the following scenario:

The conductors of a newly installed ring final circuit are to be tested for continuity. The circuit is wired in PVC single core cables contained in PVC conduit. All circuit conductors are 2.5mm2 and the end to end length of each loop is 75m.

Whilst testing the ring final circuit the reading at one of the socket-outlets for stage 2 was found to be 0.42 Ω but an over range reading was obtained for stage 3. What condition would cause these results?
- The line conductor is not connected.
- The neutral conductor is not connected.
- Line and cpc conductor connections are reversed.
- Line and neutral conductor connections are reversed.
Correct

Incorrect
Question 26 of 60

26. Question
What is the most likely cause of significantly different readings at each socket-outlet when carrying out stage 3, as shown in GN3, during testing of a newly installed ring final circuit?
- incorrect polarity at one of the sockets on the circuit.
- Reduced size circuit protective conductor in the cable.
- Incorrect cross connection of conductors at the consumer unit.
- Interference from other circuits connected to the consumer unit.
Correct

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Question 27 of 60

27. Question
What is the most appropriate method of verifying the polarity of the ring final circuit?
- Using a long lead and testing from the MET to each socket in turn.
- Testing at each socket using and earth fault loop impedance tester.
- Linking line and cpc and testing at each socket between line and cpc.
- Interference from other circuits Comparing the test results from stage 2 and stage 3 as identified in GN3. to the consumer unit.
Correct

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Question 28 of 60

28. Question
Questions 28 to 32 relate to the following scenario:

Tests are to be carried out on a newly installed installation forming part of 230 V single- phase TT system. The installation is protected by a 300 mA BS EN 61008 RCD installed for fire protection. 30mA BS EN 61009 RCBOs are installed protecting each outgoing circuit.

How is the maximum resistance for the installation earth electrode determined?
- 50V ÷ I∆n
- 230V ÷ I∆n
- 50 V x I∆n
- 230V x I∆n
Correct

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Question 29 of 60

29. Question
Questions 28 to 32 relate to the following scenario:

Tests are to be carried out on a newly installed installation forming part of 230 V single- phase TT system. The installation is protected by a 300 mA BS EN 61008 RCD installed for fire protection. 30mA BS EN 61009 RCBOs are installed protecting each outgoing circuit.

What is verified by carrying out a 1⁄2 IΔn test on an RCD?
- The disconnection time will be met.
- The RCD is not subject to nuisance tripping.
- The RCD will operate when a fault current occurs.
- The requirements for additional protection will be met.
Correct

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Question 30 of 60

30. Question
Questions 28 to 32 relate to the following scenario:

Tests are to be carried out on a newly installed installation forming part of 230 V single- phase TT system. The installation is protected by a 300 mA BS EN 61008 RCD installed for fire protection. 30mA BS EN 61009 RCBOs are installed protecting each outgoing circuit.

What is the main purpose for carrying out a 5 IΔn test on a 30 mA RCD protecting 13 A socket-outlets in a dwelling?
- To ensure the RCD mechanism works correctly.
- To verify it meets the requirements of BS EN 61008.
- To verify it meets the requirements for Additional Protection.
- To verify it meets the requirements for Automatic Disconnection.
Correct

Incorrect
Question 31 of 60

31. Question
Questions 28 to 32 relate to the following scenario:

Tests are to be carried out on a newly installed installation forming part of 230 V single- phase TT system. The installation is protected by a 300 mA BS EN 61008 RCD installed for fire protection. 30mA BS EN 61009 RCBOs are installed protecting each outgoing circuit.

What would be the x1 test current for an RCD having the maximum rating when providing fire protection?
- 30 mA
- 100 mA.
- 300 mA
- 500 mA
Correct

Incorrect
Question 32 of 60

32. Question
Questions 28 to 32 relate to the following scenario:

Tests are to be carried out on a newly installed installation forming part of 230 V single- phase TT system. The installation is protected by a 300 mA BS EN 61008 RCD installed for fire protection. 30mA BS EN 61009 RCBOs are installed protecting each outgoing circuit.

What are the correct test tripping time for the 30 mA BE EN 61009 RCBOs when tested at 1x IΔn?
- 200ms
- 300ms
- 100 ms
- 40 ms
Correct

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Question 33 of 60

33. Question
Questions 33 to 40 relate to the following scenario:

A commercial storage unit has been rewired and the installation forms part of 400/230 V three-phase TN-S system. All ‘dead’ tests have been completed. ‘Live’ testing is about to commence.

Why is a live polarity check carried out at the origin of the installation?
- To verify that double-pole switches will automatically operate.
- To replace the need for a dead polarity test on the installation.
- To ensure the DNO’s incoming supply has the correct polarity.
- To verify that the polarity throughout the installation is correct.
Correct

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Question 34 of 60

34. Question
Questions 33 to 40 relate to the following scenario:

A commercial storage unit has been rewired and the installation forms part of 400/230 V three-phase TN-S system. All ‘dead’ tests have been completed. ‘Live’ testing is about to commence.

What is the reason for verifying the prospective fault current at the origin of the installation?
- To verify that the protective devices operate in the disconnection time given in BS 7671.
- To verify that the protective conductors of the installation can withstand the prospective fault current.
- To verify that the prospective fault current exceeds the breaking capacities of the protective devices.
- To verify that the short circuit breaking capacity of the protective devices exceed the value of prospective fault current.
Correct

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Question 35 of 60

35. Question
Questions 33 to 40 relate to the following scenario:

A commercial storage unit has been rewired and the installation forms part of 400/230 V three-phase TN-S system. All ‘dead’ tests have been completed. ‘Live’ testing is about to commence.

What is the purpose of verifying the earth fault loop impedance at the furthest point on each final circuit?
- To verify the impedance is high enough to ensure RCDs are tripped.
- To verify the impedance is low enough to cause a high fault current to flow.
- To verify the impedance is high enough to cause a low fault current to flow.
- To verify that the fault current exceeds the breaking capacity of the protective device.
Correct

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Question 36 of 60

36. Question
Questions 33 to 40 relate to the following scenario:

A commercial storage unit has been rewired and the installation forms part of 400/230 V three-phase TN-S system. All ‘dead’ tests have been completed. ‘Live’ testing is about to commence.

What action should be taken to allow for the effect of transient voltages when carrying out earth fault loop impedance tests?
- Turn on the anti-trip function on the instrument.
- Turn off the anti-trip function on the instrument.
- The instrument is on the lowest measuring range.
- The test is repeated to confirm consistent readings.
Correct

Incorrect
Question 37 of 60

37. Question
Questions 33 to 40 relate to the following scenario:

A commercial storage unit has been rewired and the installation forms part of 400/230 V three-phase TN-S system. All ‘dead’ tests have been completed. ‘Live’ testing is about to commence.

What factor can significantly reduce the values of measured earth fault loop impedance, compared to a calculated figure obtained using measured Ze and measured R1 + R2 values?
- Leakage currents.
- Harmonic currents.
- Parallel earth paths.
- A change in temperature.
Correct

Incorrect
Question 38 of 60

38. Question
Questions 33 to 40 relate to the following scenario:

A commercial storage unit has been rewired and the installation forms part of 400/230 V three-phase TN-S system. All ‘dead’ tests have been completed. ‘Live’ testing is about to commence.

What value requires the application of a multiplier correction factor when confirming an earth fault loop impedance test result complies with the IET Wiring Regulations?
- The tabulated values in BS 7671.
- The values in Guidance Note 3.
- The measured R1+R2 value.
- The measured ZS values.
Correct

Incorrect
Question 39 of 60

39. Question
Questions 33 to 40 relate to the following scenario:

A commercial storage unit has been rewired and the installation forms part of 400/230 V three-phase TN-S system. All ‘dead’ tests have been completed. ‘Live’ testing is about to commence.

The water heater circuit is wired in 6mm2 with a 2.5mm2 cpc conductors and is protected by a 32 A BS 88-2 fuse.

What is the maximum permitted measured earth fault loop impedance value for compliance with BS 7671?
- 0.79 Ω .
- 0.99 Ω
- 1.36 Ω
- 1.70 Ω
Correct

Incorrect
Question 40 of 60

40. Question
Questions 33 to 40 relate to the following scenario:

A commercial storage unit has been rewired and the installation forms part of 400/230 V three-phase TN-S system. All ‘dead’ tests have been completed. ‘Live’ testing is about to commence.

What is the purpose of the phase-sequence test?
- To ensure harmonic currents are not created on the system.
- To ensure that three-phase motors turn in the correct direction.
- To ensure balanced loads on the three-phase distribution board.
- To ensure single-pole protective devices are in the line conductor.
Correct

Incorrect
Question 41 of 60

41. Question
What would be the correct procedure to confirm that the existing electrical installation in a dwelling is suitable for the additional wiring of an extension?
- A visual inspection of the wiring and condition of the accessories.
- A full review of the original electrical installation certificate.
- Certification of the additional wiring on completion of the extension.
- A periodic inspection and test of the existing installation.
Correct

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Question 42 of 60

42. Question
What is the purpose of a periodic inspection and test relating to the safety of the building?
- There is no risk of electric shock and burns.
- There is no risk of fire caused by the electrical installation.
- That the electrical installation is not damaged.
- That there are no defects or non-compliances present.
Correct

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Question 43 of 60

43. Question
What is the minimum level of IP protection for the opening shown as Item A in Figure 1?
- IP4X
- IPX4
- IP2X
- IPX2
Correct

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Question 44 of 60

44. Question
What is the minimum level of IP protection for the accessible top surface of a consumer unit?
- IP4X
- IPX4
- IP2X
- IP2X
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Question 45 of 60

45. Question
Which publication gives detailed information for carrying out testing of electrical installations?
- HSE GS 38
- IET Guidance Note 3
- IET Guidance note 1
- HS(G)141
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Question 46 of 60

46. Question
What would be agreed with the client and recorded as a limitation for a periodic inspection and test?
- No insulation resistance testing between live conductors to be carried out.
- The installation can be isolated and a full range of tests to be carried out.
- The finalised report is to be provided to the client electronically.
- Only calibrated test instruments are to be used.
Correct

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Question 47 of 60

47. Question
Which statutory document includes the requirements for working on live conductors?
- The Electricity Safety Quality and Continuity Regulations.
- The Construction (Design and Management) Regulations.
- The Health and Safety at Work Act.
- The Electricity at Work Regulations.
Correct

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Question 48 of 60

48. Question
What action should the inspector take, both before and after testing, to confirm isolation

of the supply?
- Switch the main isolator on and off.
- Lock the main switch on the open position.
- Confirm the operation of the approved voltage indicator.
- Attach a warning label at the isolator stating ‘do not switch on’.
Correct

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Question 49 of 60

49. Question
Questions 49 to 51 relate to the following scenario.

An inspection is to be carried out at the termination of the circuit conductors inside a terminal box, as shown in Figure 2.

Which human sense is best used to confirm the terminals are suitably tightened?
- Touch.
- Sight.
- Smell.
- Hearing.
Correct

Incorrect
Question 50 of 60

50. Question
Questions 49 to 51 relate to the following scenario.

An inspection is to be carried out at the termination of the circuit conductors inside a terminal box, as shown in Figure 2.

What is confirmed when inspecting the conductor insulation?
- Suitable csa.
- Correctly identified.
- Terminals are tight.
- Contained in the terminals.
Correct

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Question 51 of 60

51. Question
Questions 49 to 51 relate to the following scenario.

An inspection is to be carried out at the termination of the circuit conductors inside a terminal box, as shown in Figure 2.

Which classification code would be given on the Schedule of Inspections for the situation shown in Figure 3?
- C1
- C2
- N/V
- FI
Correct

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Question 52 of 60

52. Question
Which classification code indicates that there is a non-compliance which is identified as ‘improvement recommended’?
- C1
- C2
- C3
- FI
Correct

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Question 53 of 60

53. Question
Which human senses would be best used to determine excess arcing at a contactor during a walk around survey?
- Touch and smell.
- Sight and hearing.
- Smell and sight.
- Hearing and smell.
Correct

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Question 54 of 60

54. Question
Questions 54 to 57 relate to the following scenario.

A test is to be carried out to confirm the continuity of the main protective bonding conductor to the metallic water installation pipework in a commercial premises.

What is the risk if the installation is not safely isolated for this test?
- Poor performance of connected equipment.
- Electric shock from different potentials.
- Possible loss of computer data.
- Tripping hazards from the test method.
Correct

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Question 55 of 60

55. Question
Questions 54 to 57 relate to the following scenario.

A test is to be carried out to confirm the continuity of the main protective bonding conductor to the metallic water installation pipework in a commercial premises.

What is the purpose of the test of continuity of main protective bonding conductors?
- To confirm extraneous conductive parts are connected to the MET.
- To confirm there is a low earth return path for fault current.
- To confirm exposed conductive parts are connected to the MET.
- To confirm that a high current will flow in the event of an earth fault.
Correct

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Question 56 of 60

56. Question
Questions 54 to 57 relate to the following scenario.

A test is to be carried out to confirm the continuity of the main protective bonding conductor to the metallic water installation pipework in a commercial premises.

What important check must be made with the instrument leads before a reading is taken?
- Leads have a 3 mm exposed tip.
- Leads are a minimum 10 mm .
- Leads are nulled or zeroed.
- Leads are fitted with finger guards.
Correct

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Question 57 of 60

57. Question
Questions 54 to 57 relate to the following scenario.

A test is to be carried out to confirm the continuity of the main protective bonding conductor to the water installation pipework in a commercial premises.

Which test method is used for this test?
- Earth fault loop impedance.
- Linked R1 + R2 test.
- Long lead test.
- Zs–Ze.
Correct

Incorrect
Question 58 of 60

58. Question
A 10 mm2 main protective bonding conductor is 37.5 m in length.
What is the expected measured resistance when testing the conductor?
- 6.86 Ω
- 0.70 Ω
- 0.08 Ω
- 0.07 Ω
Correct

Incorrect
Question 59 of 60

59. Question
What is the most likely cause of the measured value being much higher than the calculated value?
- Heavy load on the installation.
- Failure to null the test leads.
- Higher than normal ambient temperature.
- Leakage current from computer equipment.
Correct

Incorrect
Question 60 of 60

60. Question
What is confirmed by an earth fault loop impedance test on a radial power circuit?
- The line and cpc conductors are the right csa.
- Fault protection is provided for the whole installation.
- The circuit breaker can disconnect the maximum prospective fault current.
- Automatic disconnection of supply will be achieved in the event of a fault.
Correct

Incorrect

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