Hi there. This is a calculation to comfirm your readings are correct. You still need to measure.

Ps. You'd still need a loop testerto get your ze figure.
 
I have my niceic inspection tomorrow and would like to know how to calculate your cable length from the results you have measured on the cert? Can you help
 
I have my niceic inspection tomorrow and would like to know how to calculate your cable length from the results you have measured on the cert? Can you help


Probably the easiest way is to use your R1+R2 values and the stated values of resistance per metre for a particular cable, found in the OSG for instance.
 

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Prospective fault current
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Periodic Inspection Reporting & Certification
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