I have noticed quite recently that when I go to my garage where my RCD unit and electricity supply box is, I can hear a buzzing noise coming from one or other of these boxes. What does this mean? The noise comes and goes. Is it dangerous?
hi there this is not a normal thing for an rcd to be buzzing i would suggest you get an electrician to look at it sooner rather than later as it could be
loose conections and the buzzing sound is arking of the cables which could result in fire, most electricians should come out to asses the job for free so ring one soon as mate.