I am just starting to decorate a bedroom, in the room is a double socket containing 2 cables the red obviously live are twisted together and put into the live part of the switch, the neutral black are twisted together and put into the neutral part of the switch, but I found out that one of the black wires is live ( i got a shock from it.) it disappears into the wall I have no idea where it goes next or where it comes from I'm assuming that some where else it must be connected to a live wire? How do I find where it goes or comes from and how the hell has it worked ok before?
I need some HELP
I need some HELP