Recent content by kevrevv

you only need to check if the rcd trips within the specified time. if it does then it is ok. if it trips on any circuit within 40ms x delta 5 then u are ok. there are 7 tests for an rcd altogether. u are not checking the impedance of the circuit u are checking if the rcd trips within a time when...

rcds work on the principle of what goes out in the line, comes back in the nuetral if there is an imbalance, i.e. 30milli amps then it will trip.

rcd is tripping do to a residual current leak. you will need to do an insulation resistance test on the cable. that will tell you if that cable is the problem. doubt it will be the switch nor spur unless u have moisure, grease etc allowing suface curent to flow across it?