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That’s the replacement breaker, damage to it and case looks like it’s been caused during installation, no idea how, it’s definitely not melted/burning. All seems to be working fine though.

To update, installer has been out, checked for loose connections, tested the wiring and replaced the rcd. I noticed that under the original fault after tripping the MCB was warm/hot to the touch after the shower had been running. While the replacement remains cold, so seems like faulty breaker...

Oh, yeh, it’s in a loft extension they ran the cable up the outside of the house rather than internally

Steel wire armoured, the heavy cable going in to the consumer unit.

No, it’s an entirely new en suite, including the swa brought from the supply and consumer unit.

Can confirm it’s 8.5kw

Ok thanks will try to amend my OP. With a short circuit would it be likely to run for 5 mins before tripping?

Added

Newly installed Triton T80 8.5kW shower. The shower is tripping the MCB after about 5mins of use since it was installed. It’s on an 40A MCB which feels warm to the touch after it trips. Appears to be 6mm cable, the consumer unit is less than 18m away. No sign of water leaks, completely dry...

D'oh, why didn't think of that! :rolleyes:

I intend to use a timber splice plate, such as this, to join two lengths of 6x2. When nailing, my understanding is a nail goes in every hole. However using the 4 plates as pictured, and 30mm nails, wouldn't the nails meet in the middle of the wood? As the timber's 50mm thick 30mm nails driven in...

Posts are in now, without gravel and painted with underbody seal. Time will tell...

Thanks for the replies. What do people think of this video? It seems to agree with my instincts on using gravel at the bottom of posts in clay soils and the potential for creating a well for water to collect. Anyway I've got some car underbody sealant on the posts (another debate - to paint...

Thanks, yes I've got treated timber (y)

Hi, I'm building a lean to roof down side of my house. I'll be using 4x4 wooden fence posts to support the eaves side of the roof at a height of around 6.5ft. I've dug 2ft holes to set them in concrete. After about 1ft down the ground is very clay-y. Is it a good idea to put 2" of gravel at the...

The fact it’s silk paint underneath will only affect the adhesion, and whether or not that’s an issue is debatable, as per pps. (fwiw I’d just wash down with sugar soap before painting). Assuming the paint is taking ok, then the fact the old colour showing through is because of the quality of...

I’ve recently been using this paint https://www.brewers.co.uk/product/AA0144001J and the accompanying primer https://www.brewers.co.uk/product/AA0146001J to paint bare wood and bare mdf. 2 coats of the primer and one coat of paint has gone on fine. Haven’t tried the paint over factory primed...

Just been to Tool station, they have Dulux trade vinyl Matt 10L for £41! I get an additional 10% off there so it’s a no brainer!

Isn’t that quite normal for the mist coat? Contract Matt is not hard wearing at all and I often find quite it powdery/chalky. Vinyl Matt is better for the finishing coat after using contract matt to mist coat new plaster. On the other hand I believe you can use diluted vinyl Matt on fresh...

Sorry I got confused I saw the negative reviews on B&Q https://www.diy.com/departments/leyland-trade-contract-white-matt-emulsion-paint-12l/290129_BQ.prd And that’s the contact Matt rather than vinyl. The £14 wickes Matt emulsion looks good value for mist coat on new plaster but wouldn’t use it...