I am replacing a standard double 13a wall plug socket with a double rcd socket as I am running an 8 plug extension for the tv, sky, dvd etc. I figure the rcd will be a safer way to go. My question is I removed the socket and went to fit the RCD but the live wire wont reach. Is there a safe way of extending the wire? only thing that i can think of is solder and lots of insulation...