I removed an MCB while I changed a double socket. When I plugged the MCB back in the consumer unit it made a buzzing/arcing noise which eventually ceased.
Am I right in thinking that it's time to get a new one?
Buzzing MCB
Aug 31, 2007
1 Replies
Given how cheap they are, yes. Most common reason for MCB failure whilst fitting is entry of plaster dust or other building dust, and I could imagine it might cause the symptom you observed.
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