Hello, Question, would it be safe if I changed a 13amp master switch for 4 wall sockets to an RCD? The sparky who fitted it said it was a precaution, the reason I want to change it is so I can fit a 4way multi socket with out over loading the fuse, so I can plug in my new surround sound system that I do not have a spare socket for. I'm not an expert as you can guess but I'm going on what a friend as suggested but wanted to get some further advise before doing anything. Thanks for your help Regards Rmharrison