The old days where house main earthing leads were green 6.0mm2. Ring "mains" were wired in 2.5mm2 T&E with 1.0mm2 earth continuity conductors. And the use of plastic oval conduit in plaster was common.
Is this compliant? Please see picture.
Z.
Whilst colours are convenient, do they actually matter? It could be that they stop people actually testing what goes where and making an assumption that everything found in the socket is correct. G/Y for Earth is probably sensible, but the others? I don't care what the colours are from a practical viewpoint, and I don't even like the silly notice saying colours from a mixture of regulation dates may be present. In the HV world cables don't have colours, modern ones are all red sheathed, old ones may be lead! EHV ones are all bare aluminium. I rather liked the old colours red/black for single phase, RYB for 3 phase (and 2 way switches) etc. In larger installations black with numbered cores may well be present, and one should never believe the colours anyway, but I suppose it makes connecting up slightly quicker and allows testing to be ignored (at someones peril)! Take a trunking installation with many cables, How often does one find labels on each circuit with some ident? In good quality control panels there will be cable markers at each termination, and probably all the wires one colour, I think a better system and very helpful if there is a fault, particularly if one also has the wiring schedule and a circuit diagram, many of the wires not being live or neutral and quite possibly both at various times.
Whilst colours are convenient, do they actually matter? It could be that they stop people actually testing what goes where and making an assumption that everything found in the socket is correct. G/Y for Earth is probably sensible, but the others? I don't care what the colours are from a practical viewpoint, and I don't even like the silly notice saying colours from a mixture of regulation dates may be present. In the HV world cables don't have colours, modern ones are all red sheathed, old ones may be lead! EHV ones are all bare aluminium. I rather liked the old colours red/black for single phase, RYB for 3 phase (and 2 way switches) etc. In larger installations black with numbered cores may well be present, and one should never believe the colours anyway, but I suppose it makes connecting up slightly quicker and allows testing to be ignored (at someones peril)! Take a trunking installation with many cables, How often does one find labels on each circuit with some ident? In good quality control panels there will be cable markers at each termination, and probably all the wires one colour, I think a better system and very helpful if there is a fault, particularly if one also has the wiring schedule and a circuit diagram, many of the wires not being live or neutral and quite possibly both at various times.
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