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Happened to me many years ago changed board ,new board rcd protected tripped on connection , not touched any circuits . Found a socket fixing screw hard caught neutral when originally fitted. Worked fine before rcd fitted.
Discuss Main RCD Tripping & Not MCB in the Electrical Forum area at ElectriciansForums.net
Or " Ask me another"Does it have more than one neutral bar.
This is like charades.
It looks correctly configured for me - all 7 circuits supplied from RCD - correct I would expect another RCD aswel, but is it really needed with only 7 circuits - not tried disconnecting all other circuits - sorry not got a pic
The fault I haven't come across before is the RCD tripping when touching the neutral conductors (for the ring main) to the neutral bar when all MCBs are off (the only equip. turned on is the 100A Main sw & 63A Main RCD)
IR Clear - >2000
Borrowed neutrals would have no effect in this instance as there is just 1 RCD protecting the whole installation by the sounds of it.I think a photograph of the inside of this board is going to show a complete mess if it’s a diy.
If the board is diy, then I bet there’s other jobs been done in the house... shared neutrals between sockets and another circuit perhaps?
Borrowed neutrals would have no effect in this instance as there is just 1 RCD protecting the whole installation by the sounds of it.
OP are there 2 lighting circuits if yes could be he has got crossed Ns ie N for up stairs and down stairs crossed, try swapping the Ns over, let us know how you get on.Could the Neutrals for the socket circuits be mixed up with the socket circuit on the other side of the board? This would mean you are connecting 1 leg of each circuit into the rcd side that's tripping and causing an unbalanced load.
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