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I have taken down an old hall ceiling light and I have 3 wires which are the same grey colour. Whatever way I rewire them to the new light fitting it affects the bathroom light. If I wire them in one configuration I can have the hall light on or both the hall and bathroom lights on at the same time but never the bathroom on its own.

The wire that I have:
Wire 1 will be live when I turn on the hall switch
Wire 2 will be live when I turn on the bathroom switch and have a working light bulb in the bathroom.
Wire 3 does not light up with the phase tested at all so I assume it is the neutral wire

What I have wired at the moment:
I have wire 1 wired into the Live section of the light
I have wire 3 in the Neutral Section

The hall light works fine. I have tried wire 2 in the Live/Neutral/Loop section of the hall light fitting and I either dont get the bathroom light working or it will only work when the hall light is switched off. I feel light I have tried every combination but I am obviously missing something.

The new light fitting has 1 Live, 3 Loop, 2 Neutral sections empty. The old light fitting seems to only have 1 Live and 1 Neutral.

Many thanks for any advice
 
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Need some pictures. Don't suppose you took one before you disconnected it all.
 
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Need some pictures. Don't suppose you took one before you disconnected it all.
Unfortunately I didn't get to take a picture before I disconnected the old one. I normally do but I had to cut the old one down with a Dremil as it had been plastered and painted into the ceiling over the years by the previous owner of the house.

Here is a photo of the current setup.

IMG_5253.jpg

IMG_5252.jpg
 

telectrix

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1 hour's time for a sparks to sort. £50 or less.
 

ipf

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What happens to wire 2 with no lamp?
...and, more importantly, what are you testing it with?
 
If the wiring at that ceiling rose affects the bathroom light then something seems wrong at that rose. They all appear to have red insulation but I suspect there are two neutrals and a switch line return.
 
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Those were definitely the only conductors at the old ceiling rose.
 

ipf

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If the wiring at that ceiling rose affects the bathroom light then something seems wrong at that rose. They all appear to have red insulation but I suspect there are two neutrals and a switch line return.
That's what I was indicating, above. I don't like giving answers to the uninitiated, just the odd clue.
Seems like it's in Ireland, a diy job...…..ask Risteard?
 
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  • #12
I have managed to solve the issue. It was a shared neutral wire coming from the bathroom. I thought it was a switched hot wire because I got a reaction from the phase tester.

What gave a clue was that I had to use a working light buld in the bathroom to get a reading on wire 2 which lead me to think it was a return neutral wire from the bathroom rather than a hot switch wire like I thought.
 

Pete999

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That's what I was indicating, above. I don't like giving answers to the uninitiated, just the odd clue.
Seems like it's in Ireland, a diy job...…..ask Risteard?
Terribly sorry Old Chap.
 
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