Since buying my new house, that needs a fair amount of renovation, I've been doing a lot of reading up on DIY projects and there is one thing I just don't get regarding the way in which houses are wired.
Wall sockets are wired on a 'ring' and as I understand it you start with a wire coming from the fuse in the consumer unit to the first (nearest) socket, then next, then the next and so on final this daisy-chaining ends with the wire going back into the same fuse.
Lighting, however, starts at a CU fuse then goes to the first light connection, then the second, third etc etc - again in daisy-chain but the lighting circuit terminates with the last light fitting i.e. it does not return to the fuse
Why?
Why is a ring main a good idea for your 13amp sockets but not for the lighting circuit?
Wall sockets are wired on a 'ring' and as I understand it you start with a wire coming from the fuse in the consumer unit to the first (nearest) socket, then next, then the next and so on final this daisy-chaining ends with the wire going back into the same fuse.
Lighting, however, starts at a CU fuse then goes to the first light connection, then the second, third etc etc - again in daisy-chain but the lighting circuit terminates with the last light fitting i.e. it does not return to the fuse
Why?
Why is a ring main a good idea for your 13amp sockets but not for the lighting circuit?