Testing above 50V AC or 120V DC the test instrument must comply with - GS38, The tests carried out using approved voltage indicator comply with GS38 - Live polarity, Regular checking may be carried out using known references - Verification, Test be carried out on each piece of test equipmentannually  - Calibration, Tester used to measure the earth continuity  - Low-resistance ohmmeter, The meter setting for continuity of protective conductors - Ohms (Ω), test method used to measure the continuity of main protective conductor - Earth continuity method 2, Test method used to measure the continuity of circuit protective conductor  - Earth continuity method 1, One reason for performing continuity of the ring final circuit is  - No interconnection , Used to measure the insulation resistance - Insulation resistance tester , Preparation of low resistance ohmmeter - Null the leads , Testing insulation resistance of SELV or PELV circuits - 250V DC, Testing insulation resistance for circuits that operate up to 500 V - 500V DC, Testing insulation resistance for circuits that operate over 500 V - 1000V DC, Minimum insulation resistance when testing applying 500V dcting a - 1MΩ, Minimum insulation resistance when testing SELV and PELVg  - 0.5MΩ, Applied test current for insulation resistance  - 1mA, Applied test current using low resistance ohmmeter  - 200 mA, Type of fuse used to protect the leads of voltage indicator  - HBC, The size of fuse used to protect the leads of approved voltage indicator  - 500 mA,

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