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INSULATION RESISTANCE CALCULATION FOR CABLES

Cables : IS-732-B, III-1962

The insulation resistance between each conductor and earth shall be measured. The insulation resistance varies with the type of insulation used and with the length of the cable. The following empirical role gives reasonable guidance.

    

I.R. value in mega   =    10 x Voltage in kV (phase to phase)  /  Length in km

                                                                  

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