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Can't claim to be that brave, as all the individual bits had been tested beforehand and I was not allowed to actually replace the ornaments. I also have to admit that as the attic really needed sorting most of the books are in a big pile in my office! The more worrying part is that the lack...

Back again with some answers. Fortunately, granddaughter also comes with son able to assist in this project, which made matters much easier. None of you gave me the obvious advice that any faults would be found in the places most difficult to access! But so it transpired. The first post...

I think this one's on hold for a whilel Bare wires sticking out from socket in kitchen has been deemed incompatible with a visit from my 3 year old granddaughter, especially as there is nothing not working. (Can't really argue with that.) Thanks for all the guidance, I will report back on...

Thanks JohnW2 that seems a practical approach. I have just equipped my multimeter with a 10 metre lead so I should be able to tracck then akk back to the same point.

Thanks Another interesting, if daunting , possibility, but it explains why it is importsant that I should isolate more than just the ring in question. I am beginning to realise how much more I have to learn about the operation of RCBOs. Would the spill current go down the small white...

Thanks EFLImpudence, that would indeed explain the situation. I can close the L-L break or the N-N break and the RCBO does not trip, but as soon as I join the earth wires it trips. However, your diagram means that I have now two faults: a N-E resistive fault that could be anywhere plus a...

Yes, I did try to find the fault, but the trips were intermittent and did not show up immediately. To be honest, I was convinced that I wiould find it on the "Back" ring, which has things like waterfall pumps and outdoor sockets, rather than the "House " ring, which has been installed and...

That was interesting! L-L Dead Short N-N Deat Short E-E 100 ohms So I checked both the eart wires to a water pipe Clockwise Dead Short Anticlockwise 100 ohms This means that I have some resistance in the earth wire for that part of the circuit. I suppose it could be a loose or...

I cannot remember if I did those continuity tests, so I will do them again. I rater assumed that if there were no volts between them they were joined together, but that may not be so. Thanks Unfortunately, my computer is on the circuit in question, so it will take some time to respond.

You are right, there are two rings, but the other one seems to be working fine and it is a complete ring. That one was added when we had major extensions a few years ago. The wires for that go off in another direction, so I do not think they are involved. The ring that I cannot close is...

How do you mean "Mixed up"? There is only one ring involved in this problem and if I had crossed the Phase and Neutral ther would have been volts between them at the ring break. I have not rewired any of the ring circuit, only its supply. Please clarify what you think I may have miswired...

After failing to find why one of my ring circuits tripped the RCD for the whole house, apparently at random, I replaced the CU with a new MK high integrity box. This meant that I could fit RCBOs to each of the ring circuits and (lights plus fire alarms) circuit. The rest go via an RCD, as...