I am shortly going to fit a power supply to a new garage.
I think I understand the basic logic of fitting an RCD to protect a circuit where some, if not all, of the cable is buried in a wall. Can I fit the RCD directly downstream of a plug-in MCB located in an old Wilex CU fuseway?
If this RCD is in the house rather than the garage, downstream can I also fit a Garage CU (RCD plus 2 MCB) within the garage for splitting/isolating the lighting and power circuits? My understanding is you shouldn't fit two RCD's to protect the same circuit.
I think I understand the basic logic of fitting an RCD to protect a circuit where some, if not all, of the cable is buried in a wall. Can I fit the RCD directly downstream of a plug-in MCB located in an old Wilex CU fuseway?
If this RCD is in the house rather than the garage, downstream can I also fit a Garage CU (RCD plus 2 MCB) within the garage for splitting/isolating the lighting and power circuits? My understanding is you shouldn't fit two RCD's to protect the same circuit.