I have a Wylex CU with RCBOs + 2 RCDs with three circuits on each RCD.
One of the circuits on one of the RCDs is an external socket - just a double socket on the end of a radial with a DP switch in the kitchen to switch it one/off.
Fault I have is that any load on the ext socket causes both RCDs to trip - but not the RCBOs.
So far I've tried:
- Rigging up a temp socket to see it it's the socket itself.
- Trying a multimeter on every combination on everything I can think of.
- Replacing the DP switch with a socket so that it's just a wire from the CU to a socket.
The RCDs trip as soon as the two RCDs are closed even if the Ext Socket circuit is the only MCB closed.
If just the one RCD is closed then no trip. As soon as the other one is closed both trip even if all the MCBs on the second ore off.
Nothing trips on any circuit until there is a draw on the ext socket circuit but both RCDs trip immediately if there is a draw.
Am I missing something obvious?
One of the circuits on one of the RCDs is an external socket - just a double socket on the end of a radial with a DP switch in the kitchen to switch it one/off.
Fault I have is that any load on the ext socket causes both RCDs to trip - but not the RCBOs.
So far I've tried:
- Rigging up a temp socket to see it it's the socket itself.
- Trying a multimeter on every combination on everything I can think of.
- Replacing the DP switch with a socket so that it's just a wire from the CU to a socket.
The RCDs trip as soon as the two RCDs are closed even if the Ext Socket circuit is the only MCB closed.
If just the one RCD is closed then no trip. As soon as the other one is closed both trip even if all the MCBs on the second ore off.
Nothing trips on any circuit until there is a draw on the ext socket circuit but both RCDs trip immediately if there is a draw.
Am I missing something obvious?