I wonder if anyone can work out what's going on here:
I've just replaced plastic light switches with ones that have metal faceplates, and I *just* can feel electricity when I brush my fingers against them lightly. I'm certain it's not static -- I can feel the 50hz cycle.
It only happens on one lighting circuit; on other circuits with the same new switches you can't feel anything.
Does this mean that the earth on that circuit isn't connected? Or that it is connected and there's electricity flowing continuously to earth due to a fault, a little of which diverts through me when I touch the switches? Should I ignore it or try to fix? (The case of my new laptop feels the same sometimes and the user's manual says it's normal.)
Any advice appreciated as always.