Dear ;
About the mentioned way to locate the Earth Fault’s place, I have the following points :
1 – You don’t mention to the Earthing System, as with ” IT ” we use normally ” IMD equipments ” that locate the earth fault’s place.
2 – If we used the correct CB equipped with Earth Fault Protection that are chosen depending on the ” Earth Fault Protection Discrimination Study “, we can know directly at least the panel where this fault is occured, and by your way, we can locate the relevant outging.
3 – You said that the 1st earth fault should be cleared before the 2nd happen, that is 100% correct only in ” IT Earthing System “, but with other system ” TT, TN-S, TN-C “, each fault should be cleared as there’s no relation between 2 earth faults