aligarjon:
I presume the cables go through an insulated ceiling after being clipped up the wall if we are talking about a standard domestic installation ?
Yes, they are clipped to the masonry and then whatever bit of woodwork is handy, so there will be 4" lengths where they are between the masonry or woodwork and the wadding. I hope that my description makes sense.
Geez:
Gary,
These are not actually domestics, the walls form the common stairwell in a block of flats so the end of the circuit is just the top light fitting.
I personally think reference methods are an easy source of confusion, there are common installation methods that are not specifically mentioned in the BS. Looking at all the methods I can deduce the following:
Covered in insulation, whether in containment or not = "A"
Cable inside containment, no insulation = "B"
Cable touching, or very close to a wall = "C"
Tom, my apologies, I hijacked the thread a bit. ? Cables are found in masonry all over the place - domestics, the smarter common areas, the public side of hotels, etc.) and I have no doubt that "C" is correct and I agree with your rule of thumb.
In the example that I described, I went for 100# to be on the safe side. I don't know what was stuffed in the ceilings after I left. The only potential bugbear would be that 4 mm² would no longer do for a radial on a 32 A breaker.
I also agree concerning EIC as opposed to EICR - difficult to know exactly what is below (or above) the surface. Of course when you come to do an EICR, you will be presented with a folder containing the EIC and any previous EICRs will you not? ?
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