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Reference Methods
Former Community Member
Wondered what installation reference method people might be using for a T&E cable on a masonry wall that is then covered with plasterboard, ie a typical dot and dab affair. I think "C" is correct as all installation methods involving a cable in contact with a wall and NO insulation map to reference method "C". Wouldn't think the plasterboard or covering the cable with capping would make any difference. I raised the question due to seeing A,B, & C on various other contractors certs.
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"
Cable on cable tray = "E or F"
They do deviate but that seems to cover 90%
Also easy for an EIC, you know exactly what you've installed but far more tricky on an EICR.
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"
Cable on cable tray = "E or F"
They do deviate but that seems to cover 90%
Also easy for an EIC, you know exactly what you've installed but far more tricky on an EICR.
