I'm going to reuse a circuitbreaker position that used to power the bell transformer, to provide a dedicated fused connection unit for a new alarm system. The circuitbreaker is 6A, and I'd use a 3A fuse in the FCU, so in theory I can use 1mm lighting cable.
But something is nagging me that I ought to use cable at least enough for a
13A socket, in case some future house owner swops the fuses for 13A? Is that a best practice or am I being paranoid - what do the experts think? Thanks