Cannock Inspection and Testing

If multiple trades are working on a piece of equipment which needs

to remain isolated until each trade is finished.

What would be the best lock out device?

• Don't lock out just

  check with the other trades

• A single combination

  lock out

• Single lock out with a single key

• Multi hasp lockout

Regional electricity companies quote a maximum likely value of external loop impedance (outside the consumer's installation) for a TN-S system as:

• 0.35 ohm

• 0.8 ohm

• 21 ohm

• 200 ohm

EAWR states that working live is acceptable unless:

• Suitable tools are used

• Suitable PPE is worn

• It is reasonable in all circumstances for it to be dead

• An engineer gives you permission

Which of the following is the correct voltage for carrying out an insulation resistance test on a 400V three-phase circuit terminated at an isolator?

• 250 V

• 400 V

• 500 V

• 1000 V

End-to-end resistance checks would be carried out on a:

• radial circuit

• lighting circuit

• ring final circuit

• fused connection unit

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

• Earth fault loop impedance

• Continuity of the earthing conductor

• Earth electrode resistance

• Mechanical operation of the rcd

What is the IP rating for the top of an electrical enclosure

• IP4X

• IP2X

• IPXXB

• IP

What is the process called for a new installation

• EICR

• EIC

• Initial Verification

• Periodic inspection and testing

What does the initial verification prove?

• the installation is safe to stay into service

• the installation is safe to put into service

• the installation does not work

• the installation needs a minor works certificate

What is the test voltage to be applied on an IR test for a low voltage circuit?

• 250v AC

• 500v DC

• 250v DC

• 500v AC