Confusion Identifying 4th Wire in Light Fitting Ask questions and find answers to many subjects relating to electrics and electrical work

[Lacer75]

Hi, can anyone tell me what the 4th wire is in this light fitting? & if so how I wire it in? I've done several lights in my new home successfully but this is the only one with a 4th wire? https://s.amsu.ng/5jDxjxh97VtN

[Mr White]

It is hard to see, even with the nice picture you have taken.
Can you move the light and take a few more pictures.
I am trying to see where the wires actually go to.

[Lacer75]

I thank you for your reply and help but I had a brain wave and looked back on backed up pictures for when I took the light down and it turns out it was the earth, 1 went to the metal of the light itself whilst another went through the light fitting itself.

Thanks again for your kind help.