Ok, probably a question for someone suitably qualified.
I've got 4 sockets in my loft. Said sockets are spurred off a socket in a bedroom below. However Instead of the correct 13A fcu, or wrong-but-common spur straight to multiple sockets there is a 40A doepke combination RCD/circuit breaker. Yeah I know, both more expensive and less appropriate than doing it right (previous owner of my house was a telecoms engineer with dunning Kruger syndrome).
Now I'm not a spark but I know rhe way to regularise this is to remove said RCCB and replace with an appropriate FCU. That's going to take some hacking into the walls to sort the wiring out though.
In the interim could I fit a smaller MCB to the din rail holder that current houses the RCCB and be compliant? Maybe 13A/16A?
The whole question I guess hinges on whether an MCB is functionally equivalent to an fcu in this role
I've got 4 sockets in my loft. Said sockets are spurred off a socket in a bedroom below. However Instead of the correct 13A fcu, or wrong-but-common spur straight to multiple sockets there is a 40A doepke combination RCD/circuit breaker. Yeah I know, both more expensive and less appropriate than doing it right (previous owner of my house was a telecoms engineer with dunning Kruger syndrome).
Now I'm not a spark but I know rhe way to regularise this is to remove said RCCB and replace with an appropriate FCU. That's going to take some hacking into the walls to sort the wiring out though.
In the interim could I fit a smaller MCB to the din rail holder that current houses the RCCB and be compliant? Maybe 13A/16A?
The whole question I guess hinges on whether an MCB is functionally equivalent to an fcu in this role