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Please help me understand my light circuit

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6 Feb 2025
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Hello,

I am replacing my pendant light fixture with a low profile (metal) fixture.

I read a good bit and saw how light circuits are wired using the 3 loop method, wired inside the ceiling rose. There is no space in the new fixture, so I figured I would get some wago connectors, a junction box to hold them in the ceiling and some new cable with an earth line, repeat exactly the wiring in the rose and I'd be all done (to be honest, I think I can still do this as long as everything is wired up as it is in the rose, but I want to be sure)

When I opened the fixture I did not see what I expected to. See picture. There is nothing in the loop. I thought perhaps it's the last light on the circuit, but the other lights are wired the same way.

p1.jpg


In the switch I got very confused, there is two wires (not colour coded) going into one end, and a live (or switch live?) in the other. See Picture. It sort of looks how they might wire a 2 way switch. But there is only one switch controlling this light.

p2.jpg


I cannot make sense of what I'm looking at. There is a smoke alarm in same room which is almost certainly on the same circuit if that makes any difference.

Could you help me understand how this is wired? And maybe confirm if I repeat exactly the way the rose is wired using wagos, that all will be right?

Thank you.
 
Looks like they are using the switch as part of the radial, maybe an intermediate box somewhere that they have tapped into
 
Yep, keep the colours together and you can't go far wrong. Let's see your new light fixture and we can recommend the best way to connect it.
 
I assume those are correct and for OPs benefit wired in 'single' and 'single and earth' cables with the grey rings indicating the sheaths.
We have seen what appears in the purple box.
1738883154785.png
 
Odd way to do it in a newish build as most sparks would loop the neutral at the switch
 
Ahhh, very good. Thanks for the diagram Sunray, makes it very clear. I'll just go ahead with my original plan so should work fine. Thanks all.
 

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