I am replacing a light at the top of the stairs that is controlled by two different switches and am confused by what appears to be an "extra" wire! It's a 1970s house so the wires are red/black/bare(earth). From the ceiling there are three sets of red/black/earth, then another wire sheathed alone in grey. Any ideas what this wire is for?
It there because you have two switches. yellow wire in this pic. The earth wire shouldn't be bare, it should have a green and yellow sleeve of over it.
What it does depends on what its connected to, it could be the switch wire for the light or a neutral or live for something else, when you say grey, is it another colour under the sheathing? I do hope you noted what went where before you took the old light down.
I expect it is the switched live from the com of the landing switch. Two core cable from that switch to hall switch. Live picked up from hall switch drop.
Forums
Facebook
Twitter
You Tube
Instagram
Shop