Help wiring a light...

[ukfergie]

I’ve got the following setup on the stairway (picture included)

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My guess is it’s for the stairway light.

The setup is: 2 red wires twisted together 2 black wires independent from each other 2 earth wires twisted together

I expected the 2 black wires to be connected and my plan is to add a bulb, but now I’m confused.

Does anyone know of any wiring diagrams to explain this or an idea of how to test?

 

[Vortigern]

It is likely the two red, and earth,each stay together (E + Red separate!) and the remaining two wires are your Neutral and switched Live. This would need to be confirmed with test equipment. I would say DONT put them together or you will be in the Big Bang method of wiring system.

 

[Avo Mk8]

I expected the 2 black wires to be connected and my plan is to add a bulb, but now I’m confused.

as post #2 above.
but I took you to mean these (the two black wires) are the two wires you are thinking of connecting the bulb across (ignoring completely the reds), which is exactly what I would try.
I assume you don't mean you want to connect the blacks together, which is not a good idea!

 

[littlespark]

End of circuit on a loop-in (3 plate) system.

One red/black is the live and neutral coming from mains… other red/ black is live and switched live.

Looking at the image, the reds need to be put into a connector, but not electrically to anything on the light fitting.

The blacks are for the L and N of the fitting… but the insulation needs to be stripped off the end a little before putting into the terminal.
Not just screwed through the insulation like that on the pic.


Big warning.

If the power is on at your main fuse board / consumer unit, then the reds there will be live….. even if the local switch is turned off.