I have been decorating my kitchen and I took of the wall sockets to do the tiling. However, I have discovered when I put then back on the wall that one of the sockets has a "live" earth. (the mains tester is showing the earth wire as live) I also got an electric socket when screwing it back on the wall. I have tried to trace the wiring in wall without success. However, I have found another socket upstairs in the bedroom with same problem. Is the one in the kitchen connected to the bedroom ? secondly how can i find the trace the fault to which circuit ? does it mean ripping up floorboards etc ?