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What I don't understand at the moment is this: it's not the RCD, but whatever combination of MCBs (basically the modern equivalent of fuses) I have switched on or off the RCD still trips.
There has to be a fault somewhere, but if it was on one of the circuits covered by an individual MCB, and that was off, wouldn't that stop it tripping the RCD? Or can an RCD be tripped by a circuit which is meant to be isolated by an MCB?
Personally, I'd blame the HTG's connection to the PCD as well as the effect of the MHX on the LKI.
Oliver Schick
What I don't understand at the moment is this: it's not the RCD, but whatever combination of MCBs (basically the modern equivalent of fuses) I have switched on or off the RCD still trips.
There has to be a fault somewhere, but if it was on one of the circuits covered by an individual MCB, and that was off, wouldn't that stop it tripping the RCD? Or can an RCD be tripped by a circuit which is meant to be isolated by an MCB?