Is it OK to DIY and make safe dangerous wiring in a bathroom?

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barrya

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I recently bought a house, and just today being inquisitive took a look on top of the cupboard/mirror unit where there are two spot lights.
The house was built around 1988, and going by the decor in that bathroom its probably not far from the original bathroom.

The bathroom has four spotlights that I assume are mains voltage (haven't checked yet), and the two spot lights over the mirror. The ones over the mirror are LV via a transformer sat on top of the cupboard. All the spots are controlled from the bathroom light switch.

There are two sets of wires emerging from the wall, all appear to be 1.0mm2/1.5mm2 and old wiring colours. The first cable feeds the transformer and is connected by a small terminal block, no earth. There is no insulation or other protection around this. The second wires are a pair simply connected to each other (2-core + earth) both cables entering the same side. This block is taped around covering the screws, but not the other side of the terminals. The LV connector block is also just laying on top, and all the HV/LV cables are mingled together. Just moving the wires caused one of the LV wires to fall out.

Given that the bathroom gets pretty steamy (no extractor fan yet and is used primarily by the kids who can't take short or low temp. showers) it feels like a recipe for disaster.

The question is, am I permitted to take this wiring and place it inside a couple of choc-boxes (https://www.screwfix.com/p/vimark-30a-chocbox-connector-box-90-x-30-x-50mm-white/194vt) or surface pattress boxes with a blanking plate. Would this be enough? Or is this so bad it needs more work (like the whole lighting setup needs replacing)? I'm not adverse to getting a spark in, just seems a waste if its just boxing up what is there, and we'll likely re-fit the bathroom in the next 6-12 months when funds permit anyway.

Also worth mentioning the CU has a single RCD, but that only covers the sockets/shower and not the lighting.

Thanks for any advice,
Barry.
 

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Block connectors whether LV or ELV must be enclosed so the boxes in your link are fine. You probably need PPE to touch anything on top of that cabinet.
 
Nothing unusual there, and a 16th edition board, not a problem and an update circa 15 years ago.

Putting those connections in an enclosure is fine for you to do. You are not altering anything electrically as such.
 
The LV connector block is also just laying on top, and all the HV/LV cables are mingled together. Just moving the wires caused one of the LV wires to fall out.

Thanks for any advice,
Barry.

As a side note: domestic dwellings do not have any 'HV'.
The incoming supply is LV., (i.e. not exceeding 1000v AC or 1500v DC.)

You have a mix of Low voltage and Extra low voltage wiring.
 
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Looking at the photos of the top of the cabinet the first thing you need to address is the mould you have on top of your cupboard, if you do not know what I referring to is all the black spots
 
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