I need to replace my shower switch pattress box so took the old one down and have a query regarding earths. As expected, there's the 3 core cable into the switch and the 3 core cable out but there are also 2 further earth wires. I've been in the loft to check and the earth wired to the IN/SUPPLY goes off to a cold supply pipe. The other earth wasn't connected to anything in the switch (It may have been ripped out at some point by accident, perhaps when the loft insulation was fitted) I've looked in the loft and it leads to a ceiling light.
So what to do with this spare earth? I've looked at a wiring diagram and it seems the IN needs an earth (which it has, from the cold pipe) but doesn't seem to say that the OUT/LOAD needs one as well, so I'm confused. Should I secure the loose earth to the OUT/LOAD?
So what to do with this spare earth? I've looked at a wiring diagram and it seems the IN needs an earth (which it has, from the cold pipe) but doesn't seem to say that the OUT/LOAD needs one as well, so I'm confused. Should I secure the loose earth to the OUT/LOAD?
Last edited: