They definitely do
Loss of circuit
- Thread starter davecooper
- Start date
I'm not doubting/disputing that - I was asking 'in what way' they fail.
Signs of burnt housing mainly
Dunno ive never opened one up after the failure, but ive been to many jobs where there's no voltage coming out of the mcb.....its the first thing I check.
Would that be in the vicinity of (probably loose) terminals?
Interesting. As I recently wrote, I would be surprised if the contacts of an MCB which were virtually always closed would suddenly open spontaneously. When you see that, do you think that it may have often occurred as I suggested - inability to re-set after 'deliberate' opening of the contacts (manual or due to overload)?
Maybe the toggle doesnt switch it back on, not really sure, next time it happens I'll break it open.
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