We live in a community setup where a main feeder cable comes in from the street (city supply) and then is split up to each housing unit (blue on sketch). Between this point where the electricity is distributed and each housing unit there is a supply cable that then terminates into the house DB.
Now that you have some background - the cable indicated as yellow on the sketch was very slightly damaged during excavation. The earth leakage in the blue distribution tripped though. A repair was done on the yellow cable - resin join kit. However the distribution board in the housing unit trips randomly.
My question is two fold, if the cable still had damage where would the trip occur at the blue earth leakage or at the housing unit? Is there any way to test where the fault is causing the trip?
Thanks for your time.