Hi, i'm new to this forum, I am more of an electronic engineer rather than an electrician so will need some guidance please. I wired my house out 30 years ago and the standard installation with a Wylex CU fed with a 100ma rcd. The only time this would trip is if there was a genuine appliances fault or if we had a lightning strike.
I bought a new split load CU last week and fitted it yesterday. I have fed all the lighting off one side and feed ring circuits off the 30 ma RCD side. The whole thing is fed from the same old 100ma rcd. I am awaiting the supplier to fit a PME system which will be in about 3 weeks.
after fitting yesterday I had three random trips over a 24 hr period. Nothing had changed or been switched on, or plugged in. I checked with a meggar this morning and the three ring circuits are reading about 1meg to earth each as indeed the neutral is. BTW this was will all appliances connect, perhaps not recommended but thats what I done anyway.
Can anyone give some guidance as to where to start looking?? I am well used to fault finding in other fields but not this one. When it does trip it is sometime difficult to reset the rcd, it may take two or three times, any clues there or is that normal. It has not tripped for 10 hrs now.
Regards Roger
I bought a new split load CU last week and fitted it yesterday. I have fed all the lighting off one side and feed ring circuits off the 30 ma RCD side. The whole thing is fed from the same old 100ma rcd. I am awaiting the supplier to fit a PME system which will be in about 3 weeks.
after fitting yesterday I had three random trips over a 24 hr period. Nothing had changed or been switched on, or plugged in. I checked with a meggar this morning and the three ring circuits are reading about 1meg to earth each as indeed the neutral is. BTW this was will all appliances connect, perhaps not recommended but thats what I done anyway.
Can anyone give some guidance as to where to start looking?? I am well used to fault finding in other fields but not this one. When it does trip it is sometime difficult to reset the rcd, it may take two or three times, any clues there or is that normal. It has not tripped for 10 hrs now.
Regards Roger