I recently drilled into a wire in the ring circuit for my sockets in the wall and blew the fuse wire in the main board. I have subsequently reached the level of removing the plaster and exposing the damaged wire, and have had to cut it and insulate the bare ends whilst I prepare for the next stage ie wire replacement between socket and socket on that part of ring. At present I have put the electrics back on for this now to use the other sockets in the interim. I essentially have two radial circuits coming out of the same fuse point at the moment, but I also know looking at the main board that I only had one ring circuit for the whole house. Should I drop the fuse wire level to 20A (from 30A)for this interim period until the ring is reformed?