Reference Methods

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? ?

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? ?