Earth Fault Loop Impedance Testing and Recording
19 March 2016
T403 Earth Fault Loop Impedance Testing and Recording Earth fault loop impedance testing is carried out on a completed electrical installation to check compliance with BS 7671 (IET Wiring Regulations) with regard to fault protection and is normally carried out as follows: 1) With a test current of approximately 23A where circuits are protected by overcurrent devices such as fuses or circuit breakers only; or 2) With a test current of approximately 15mA, to prevent unwanted tripping where circuits are protected by 30mA or other RCDs.
To read more download the Earth Fault Loop Impedance Testing and Recording report.
