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Airhead
Hoping someone can point out the flaw in my understanding here;
We had a fault in the kitchen loop trip the RCD. In the process of narrowing it down it tripped a couple more times before isolating it to the extract fan.
We resolved it by replacing the fuse; but my understanding would be that if the fuse failed then there shouldn't be a circuit, so no current running, in which case it shouldn't trip the RCD?