How to Carry Out Earth Fault Loop Impedance Test - Measuring Zs | PTT

Our skilled technician, Sam, is giving a quick demonstration of how to carry out an Earth Fault Loop Impedance Test, otherwise known as a Direct Zs Measurement.

Every circuit must be tested to make sure that the actual loop impedance does not exceed that specified for the protective device concerned. Because of the severity of coming into contact with an electrical fault, having your electrical installations and power points tested for earth fault loop impedance is crucial.

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