Safe isolation should be carried out by

Which type of earthing system relies on a separately supplied earth, usually the sheathing on the cable

Which of the following would not be one of the human senses to use during the

initial verification of an addition to a lighting circuit:

The person carrying out inspection and testing must have

The top surface of a consumer unit should be protected from ingress of dust to a standard of

A visual inspection is necessary

before testing to check whether

Which of the following is not permitted for use as an earth electrode

Which one of the following does not need to be checked for compliance during the visual inspection of an installation

The purpose of the test button of a residual current device is to check the

select the sequence in which these tests should be conducted for a new installation:

- 1. functional 2. insulation resistance 3. polarity 4. continuity of final ring conductors

5. continuity of protective conductors

An earth fault loop impedance test Zs performed on a ring circuit would record

During an external loop impedance test, the main earthing conductor should be

The prospective short-circuit current between line and neutral is measured at 850 A. The maximum balanced prospective short-circuit current level between lines on a three phase system, as a rule of thumb, can be assumed to be approximately

Which of the following tests would not normally be required during initial verification of an electrical installation

Instrument calibration certificates are normally valid for

Control gear and interlocks should be operated when carrying out

Which of the following should accompany the inspection and test certificate

The type of certificate issued after installing an additional socket outlet

within an existing installation would be a