Any reason for this??? | on ElectriciansForums

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Electricalserv

Doing an IR on kitchen ring. Meter starts of at 155 Mohms and rises to >200 when keeping hold of test button. Leads are properly connected etc....
 
Yes, you are charging the cable capacitance. The current through and along the insulation is actually made up of three parts, 1) Capacitance charging current, starts out high and drops after the insulation has been charged to full voltage. 2) Absorption current, initially high and then drops, but can take much longer 5-10 minutes. 3) Conduction or leakage current, a small essentially steady current both through and over the insulation.
 
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