I replaced a single socket with a double today in a new build house we've lived in for around a year. Upon disconnecting the live wire I noticed it was blackened and looks to have caused some arc damage to the plastic moulding of the single socket I was replacing.
I re-terminated the wire and fitted the new socket, but is the charring something I should be worried about? Knowing the build quality issues in this house I'm less than confident of a lot of things.
The socket is in a utility room, but there have been no leaks in that area as far as I'm aware. Could it just have been caused by a poor connection by whoever fitted it?