Testing above 50V AC or 120V DC - Instrument must comply with GS38, GS 38 requirement - The tip of the probe must not exceeding 4 mm, Approve voltage indicator used for - Testing Live polarity , Instrument used for protective conductor testing - Low resistance ohmmeter , low resistance ohmmeter - Instrument used for polarity test, Checking the operation of low resistance ohmmeter - Nulling , Checking the operation of insulation resistance tester  - Open circuit testing >99MΩ and short circuit 0.0MΩ, R2 - Resistance of circuit protective conductor , R1  - Resistance of line conductor , Rn - Resistance of neutral conductor ,

Testing 2

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