Does the metal front plate of the socket have an Earth Terminal that is separate to the Earth terminal for the socket Earth, ?
If it does then these need to be linked together to ensure the metal front plate is securely Earthed in the absence of a secure Earth to the back box.
Also do as Harry has suggested but a self tapping screw should not be relied upon to prove a secure Earth connection.
I disagree. Better to put one of the ring final circuit conductors into one and the other into the other. This leaves it ready for high integrity Earthing (e.g. for high protective conductor currents) leaving only the DB to be arranged this way also.Better to try to squeeze all the cables into one terminal, rather than rely on the socket's linking of one earth terminal to the other.
I disagree. Better to put one of the ring final circuit conductors into one and the other into the other. This leaves it ready for high integrity Earthing (e.g. for high protective conductor currents) leaving only the DB to be arranged this way also.
You're missing the point. Instead of a single failure causing the entire connection to be lost it will reduce the cross-sectional area but leave a path in place.The fewer the number of terminals and riveted links the earth as to pass through, the better and the safer if one of those terminals or links goes o/c or high resistance. I wasn't suggesting forcing them into one terminal, rather I was suggesting if it was practical to do so.
Many thanks..
I had a peek on youtube and it appears that this is quite a contentious topic in the sparky community
Oh yes! we have often fitted them in audio visual rooms, the backboxes/frontplates are connected to the normal earth but the earth pin of the socket [and all of the AV kit] is connected to a separate 'clean earth'. It's usually run as a thick cable directly from the main earth bar to a local earth bar and distributed around the AV system from there.I have not seen a BS1363 socket that has anything other than this arrangement.
And what's more, you stand a good chance of it showing up during testing.You're missing the point. Instead of a single failure causing the entire connection to be lost it will reduce the cross-sectional area but leave a path in place.
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