First post so apologies if this has been asked before.
I have just finished renovating my 1970's bathoom.
When changing the ancient light fitting I noticed that there were 2 black wires and 1 red wire.
I replaced the old fitting with a new 3 halogen bulb fitting from Ikea. The wiring required Neutral, Earth and Life.
Old old fitting had 1 black wire going into it and the red wire. Assuming these are Live (red) and Neutral (black) I wired them in and it worked fine. However I am left with this spare black wire as it was left before.
Just a little worried about it, wondered if I should wire it in as the earth? But there is nothing to differenciate between the 2 black wires apart from using the one that was wired in before.
It all works fine and no electrical problems anywhere else (apart from the light in the room next door seem to randomly stop working for 10 minutes the day after I fitted it - not sure if that's related or not)
Sorry if I've rambled on. Thanks