That's crazy. I'd refuse to do that I think. Backwash chairs are designed for plumbed hot water. Sometimes that means an abundance of boilers in large salons or even unvented cylinders with immersions, but an electric shower mounted on the chair is just daft.
Yes the basic insulation of cables should not be exposed in a finished installation (526.8)
Yes containment such as metal trunking and conduit provides mechanical protection and may be used as a cpc. It would need earthing regardless of use as a cpc or not (411.3.1.1 and 543.2)
Yes a cpc...
Because new builds are thrown up by gangs of trained chimps directed by baboons working for fat cats.
I worked on a house where this problem existed. SWA used but not glanded or earthed at either end, no fuse, approx 12m run.
House was that new the road wasn't even tarmacked.
One socket...
An inspection is carried out using the 18th edition as the safety standard.
The 18th details what an inspection should and shouldn't be about.
The installation is deemed safe for continued use. Safety standards have been met.
You're overthinking it.
You can't really as then you'd be putting the whole installation under a single RCD, which is not compliant with section 314.
Another method from 522.6.204 would have to be considered if the cables were less than 50mm deep.
Solve that issue by fusing the tails correctly ?
I've seen it a lot on new builds. Most don't have a clue what they're doing, just copy other examples of quick and shoddy work.
At my pace and thoroughness I aim for 1-2 domestic inspections a day max 3 bed house, max 8 circuits per house.
This would not include remedials. As said above, any repair work could take any amount of time so is impossible to factor in.
The most I have ever done is 3-4 a day. These were one...
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