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PostPosted: Fri Mar 09, 2018 6:11 pm 
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(Attached are a few photographs to aid my description)

Evening, new forumite here, hoping my problem with Bathroom Ceiling Downlights can be solved.
Read the forum rules, so I hope I don’t transgress in anything, here.

House is a UK small, semi-detached on the South Coast, about 30years old.
The bathroom has 6x ceiling downlights with 20w MR16 bulbs, bought from Tesco.
I fitted new MR16 lampholder wires (to the original fittings) and bulbs a couple of years ago and everything has worked perfectly since then.

Last week, got up one morning and put the bathroom pull light on, as usual,
and all the upstairs lights went out and, also, the bathroom ones never came on or flickered.
This was out of the blue, as there was no hint of any problems and no recent work had been done to the house.
Downstairs, the fuse box showed Upstairs Lighting switch had gone off and wasn’t able to be put back on.
Only turning the Bathroom Light pull back off, enabled the upstairs lighting to go back on.

Tried and tested all variations of: new bulbs, moving bulbs around the sockets, trying individual bulbs, in the bathroom,
yet immediately the fuse box switch goes straight off, with the same procedure above, necessary to get lighting back on upstairs.

I am fairly sure it is something in the loft, but moving around in the loft is tricky for me,
so I thought I’d try here for some advice, before budgeting for an electrician.

Any information would be greatly appreciated. Just ask if you need any more details.
Thank you, Lisa

Junction Box #2 Text.jpg
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Two Of Six Bulb Sockets Text.jpg
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Bathroom Light Pull Text.jpg [ 136.5 KiB | Viewed 592 times ]

Outside Switches Text.jpg
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PostPosted: Fri Mar 09, 2018 6:28 pm 
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almost certainly a short somewhere on that bathroom light circuit. Either water getting in somewhere or rodent damage to a cable or a loose connection causing a short at one of the transformers. fault at the transformer is unlikely though can happen

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PostPosted: Fri Mar 09, 2018 7:23 pm 
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The lamps you have are MR16, they are 12v, mains is 230v. ac
In order to "drop the voltage" a transformer is used.
You may have one transformer / lamp (normal) or you may have 1 transformer for x number of lamps.
Either way you have a failed transformer.

You need to have a look in the loft and find out how many tranformers you have and find the one which is causing the problems, it will either smell burnt, look burnt or both.

Fret not, a forum is a collection of opinions. Above, are mine.

Which is correct? Metre or Meter? Click the link to find out more.

Working on anything electrical? have you got a multi meter? why not? Would you hit a nail with a shoe?

If gloom had a voice, it would be me. :mrgreen:

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PostPosted: Sat Mar 10, 2018 9:59 am 
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If you're lucky the original installer may have left enough slack on the cable to allow the transformer to come through the hole in the ceiling......If you're lucky.

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