I have a consumer unit with one RCD and 8 MCB. Have lived in the house about 3 years had had the occasiional nuisance trip. however this has now becoming much more frequent. symptoms are .
1. RCD trips but MCBs stay on.
2.. Need to turn off all MCB to rest RCD.
Ihave narrowed it down to one circuit(kitchen sockets) if I leave this MCB for the RCD does not trip. Despite uplugging all appliance cannot find any problem and still trips.
Just discovered this morning the test button on the RCD does not work. I have been rather lazy here as this is the 1st time I have tested it.
Just about to get a spark in but before I do does this sound like a faulty RCD. Anything else I can do before getting professional help.
Thanks
1. RCD trips but MCBs stay on.
2.. Need to turn off all MCB to rest RCD.
Ihave narrowed it down to one circuit(kitchen sockets) if I leave this MCB for the RCD does not trip. Despite uplugging all appliance cannot find any problem and still trips.
Just discovered this morning the test button on the RCD does not work. I have been rather lazy here as this is the 1st time I have tested it.
Just about to get a spark in but before I do does this sound like a faulty RCD. Anything else I can do before getting professional help.
Thanks