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R1+r2

Discuss R1+r2 in the Periodic Inspection Reporting & Certification area at ElectriciansForums.net

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If i you can't isolate the supply to obtain an R1+R2 would it then be acceptable to calculate it?

Also then as an alternate means how would you prove polarity?
 
You calculate R1 + R2 at the design stage using resistance values of used cable and circuit length. If you cant isolate you cant do a "dead" test and would carry out a Zs test for earth continuity and polarity
 

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