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Definitely presumptuous, but in an ideal world the grey core has been sleeved blue and the table makes sense.

Do you have low mains pressure? If not the simplest solution would be just to plumb hot and cold from the combi for your new shower - 24kw+ will give a decent shower (much better than your electric ones) and while the pressure will drop slightly when someones washing their hands, it won't be for...

Old fcu probably taken off the downstairs sockets.

Maybe you're beginning to realise why the previous owners didn't sort it.

Looking good, socket cable in there already? Just mind and double check you don't have any socket cables going down across your planned route. I'm quite impressed with the build quality, they've not cut corners on your walls anyway

@FiremanT My mum's got a 7.4kw induction hob running off a 13amp plug top (not right but it's not popped yet). Run a cable suitable for a 32amp breaker and you'll be absolutely fine - it is worth checking the manufacturer's instructions though in case they specify lower overload protection for...

Access panels like these are a tidy solution

@JohnD If they've plastered to the floor, they've done that for air tightness which you're immediately undermining by breaking it out. I also don't know why you'd bother battening it out where you could just run the cables under the plaster.

He's probably thinking there might be a gap at the bottom you can run your cables in, unlikely on a wet plastered wall though. Good luck! If they're still building on your site might be worth finding one of the plasterers and chucking him a few quid to patch it up.

Ah fair enough, that's ideal. Most cables off the shelf would have an earth core which is why I suggested 5 as you're not supposed to use the earth for anything else.

Use a 5 core flex for running to the receiver, 0.75mm or greater.

@ebee The OP's intention is perfectly acceptable in the eyes of the wiring regulations - if you think it's bad practice then that's your opinion. I personally think a bit of common sense can be applied in assessing the likelihood of someone fixing things to the wall below knee height, or adding...

If that were the case then yes 100%, but for a 38x25mm trunking you'd need to chase out about 26-28mm (which would likely still be OK with 140 thick walls). I'm confident you would get all 4 cables through a 38x16 trunking with the lid off. You might want run a leg down from each box to maximise...

Even that's a bit ropey, 10mm plaster is a guess. They do make a 16mm deep trunking. The other option would be to whip the skirting off and chase the concrete

Plaster straight onto blockwork? That's honestly quite surprising/premium for a new build, you won't be complaining when you're fixing your TV there. Double check that it's not dot and dab plasterboard when you take the faceplates off. If it is wet plaster finish, I wouldn't be chasing anything...

@JohnW2 No worries - agreed it's not a major issue I just thought it's worth pointing out that you can't make calculations based on a resistive circuit

That's because you've not bothered to read any of the prior posts in this thread. Post number 1 My first post

I thought it was fairly obvious I was talking about the ohms law transposition

Probably better make sure you've got neutrals before you get ahead of yourself.

Requirements are indeed made for these cables, if you look at regulation 522.6 you'll see that running them in prescribed safe zones is not one of them.