Should I be worried or not? I've got quite a lot of metal faced plugs / switches, and this weekend whilst generally pottering around I happened to touch my voltage testing screwdriver to one of these plates and discovered that it was showing something around 12v. This was consistent then across all of the other faceplates that I touched with it. I took the switch off and found that I got the same result on the earth cable.
The device I used was the little red screwdriver in this item (http:// tinyurl.com/32xxka (links to B&Q)) which displayed a flickering 12V symbol.
Is this normal?
Matt