I am planning on getting a sparky to investigate but before I ask the same chap (or someone else) that rewired the kitched and replaced the fuse box, I thought Id seek a bit of wisdom here.
When I disabled my upstairs sockets and lights on the breakers and was cutting the cable to fit a dp socket it tripped the 63a 30mA RCD. I tested it again and worked out it was the shorting of the earth and live (not neutral) that was causing this which I find very confusing as the power was off. There is definetly no live current (tested with sparky screwdriver and multimeter).
Further testing of removing all plugs from all sockets (other that hard wired items such as immersion and dw and wmachine) and disabling all breakers had no effect on this (dead) live to earth RCD short effect (as expected tbh). N to Earth doesnt exhibit the same problem.
The plasterer spured a socket in one bedroom last week (which is why I was wiring the socket and found this provlem) but I feel this is a preexisting issue from before we moved in as the sparky experienced a similar problem during the kitchen rewire but its not reated its head and we dont have random. I havent tesyed it but believe this may well happen in other rooms upstairs too.
Any ideas what on earth (pun intendee) is happening with the L to E short triggering the RCD despite there being no power on?
Fwiw when checking the (off) L to E at the same point. there was no voltage but some variable resistance registering. This check didnt triggered the RCD.
Thanks in advance for any advice on this head scratcher.
When I disabled my upstairs sockets and lights on the breakers and was cutting the cable to fit a dp socket it tripped the 63a 30mA RCD. I tested it again and worked out it was the shorting of the earth and live (not neutral) that was causing this which I find very confusing as the power was off. There is definetly no live current (tested with sparky screwdriver and multimeter).
Further testing of removing all plugs from all sockets (other that hard wired items such as immersion and dw and wmachine) and disabling all breakers had no effect on this (dead) live to earth RCD short effect (as expected tbh). N to Earth doesnt exhibit the same problem.
The plasterer spured a socket in one bedroom last week (which is why I was wiring the socket and found this provlem) but I feel this is a preexisting issue from before we moved in as the sparky experienced a similar problem during the kitchen rewire but its not reated its head and we dont have random. I havent tesyed it but believe this may well happen in other rooms upstairs too.
Any ideas what on earth (pun intendee) is happening with the L to E short triggering the RCD despite there being no power on?
Fwiw when checking the (off) L to E at the same point. there was no voltage but some variable resistance registering. This check didnt triggered the RCD.
Thanks in advance for any advice on this head scratcher.
