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Test & Inspection

Electrical Testing:

Dead tests

The electrical tests must be completed in a strict order and dead tests must be completed satisfactorily before the live test commence.

The dead tests are:

Continuity of protective conductors including main and supplementary bonding

Continuity of ring final circuit conductors

Insulation resistance

Protection by separation of circuits

Polarity

Earth electrode resistance

Electrical Testing: Live tests

The live electrical tests follow on from the dead test. With suitable results the periodic inspector knows that it is safe for him to continue working on a live installation.

Live tests are classified as follows:

Protection by automatic disconnection of supply

Earth fault loop impedance

Operation of residual current devices

Prospective fault current


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