WorkshopChris
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- South East Essex
Personally to me Leaving a faulty circuit connected via a non-RCD protected MCB is dangerous and totally unprofessional.
Logically if the RCD will not hold in its one of three things:-
Borrowed neutral = easy to test/possibly hard to find. But as a temp measure just move the circuit to the other RCD.
Neutral to Earth Fault = Unacceptable to power up if fault not verified and isolated.
Leakage to Earth = Poor Insulation Resistance or Physical damage to a part again unacceptable to power up until varifiyed and isolated.
This is why testing, fault locating and remedial work prior to a board change is important.
Then splitting the circuit and retesting each end then, split, test and repeat until you find your fault.
Logically if the RCD will not hold in its one of three things:-
Borrowed neutral = easy to test/possibly hard to find. But as a temp measure just move the circuit to the other RCD.
Neutral to Earth Fault = Unacceptable to power up if fault not verified and isolated.
Leakage to Earth = Poor Insulation Resistance or Physical damage to a part again unacceptable to power up until varifiyed and isolated.
This is why testing, fault locating and remedial work prior to a board change is important.
Simple basic testing will tell you what type of thing you are looking for.Question how would you find and resolve the fault? Im not a sparky. I think I would disconnect each socket on the ring main, and iteratively add more sockets to the ring until find the trip. If it trips with no sockets, it'll be insulation on the first run of wire.To assume it is a single fault rather than bad insulation on the lot...
Then splitting the circuit and retesting each end then, split, test and repeat until you find your fault.