I just changed a plug socket for the first time carefully following the wiring instructions and making sure all bare wires were covered. I changed it from a plastic one to a metal one with a plastic casing. I isolated the fuse for the sockets in that part of the house and switched it off testing with a lamp. I changed it all, turned the fuse back on and then the rcd blew for the whole house. I flipped the rcd and restored everything and then the new socket seemed to be functioning as the lamp was lit by the new socket. There has been no problems since but I am wondering why it did this as I had isolated the socket. As it is Saturday morning the washing machine and dishwasher were on so not sure if this higher than normal usage caused the rcd to blow when I switched the socket fuse back on??? Any ideas why?? Thanks