"Hobbyist" wrote in message
...
When I switch my kettle off at the electric socket, a brief flash of
green light is visible behind the socket. Is this normal, or could it
be dangerous? Supposedly it's ok if the kettle plug is earthed?

Adam.

Any time a switch makes or breaks a contact while under a load, it will
cause an arc. Typically you can't see it, because it's enclosed inside the
device, but it exists and is perfectly normal. That being said, there could
still be something wrong with the device or the connection, so having a
professional look at it is a good idea