I am wanting to replace single sockets with doubles in a bedroom. It appears that the upstairs sockets are spurs from the downstairs ring main (upstairs sockets have 1 cable, downstairs generally have 3). Is it OK to replace singles with doubles and how can I be sure the upstairs sockets are all spurs from the ring main and not spurs from spurs ? Ripping up the floor to check the wiring is not something I want to do at the moment, but the wiring at the sockets all appears to be original.
Thanks
Thanks