But I thought one of your reasons that the grey must be used for neutral was that it is in the same position as was blue of RYB.
Replacing light - House that jack built!
- Thread starter AnnaA1982
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Yes, possibly but my question was relating to choosing the black or grey as neutral as I thought sparkwright was stating the grey must be used and was implying that was why the conductors are in the order they are.
Yes, it is totally logical to match up the wires, as they are arranged in a certain position within the cable.
The 3 core and earth cables are ALWAYS arranged in the same sequence
red, yellow, earth, blue
brown, black, earth, grey
As I said before, I'm not sure why it's this layout, but it is, so it makes absolutely perfect sense to copy the sequences as above.
I don't know of any reason that the conductors should be in that order.
But it just seems very logical and obvious for the old colours sequence to mirror the new colours sequence.
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I'm not sure about 'very logical and obvious' but, given that "it doesn't matter", I suppose it's at least as good a basis for making a choice as would be 'tossing a coin'!
Kind Regards, John
Even if it 'doesn't matter', I think there should be some thought and logic that goes into the decision. And I can't see any good reason to do it any other way than the way I have described. (Sounding very masterful now!)
In any case, there were guidelines at the time as to which colours should be used.
In any case, there were guidelines at the time as to which colours should be used.
As you will have seen, opinions vary. FWIW, I've established the consistent habit/convention of using grey as neutral, but not for any strong or particularly logical reason, and certainly not the reason you've suggested. However, others think that black is 'logical', even if usually for a reason that you have 'rejected'.
By 'at the time', I presume you mean the time of introduction of the harmonised colours. However, although it's slipped that way, I don't think the primary discussion is actually anything to do with 'the change' - it's about which of the harmonised colours should be used for neutral, regardless of 'the past' - and BS7671 and the OSG certainly don't give any guidance on that issue.
Kind Regards, John
If it really were "the industry standard", then there would have been little or no need for all this discussion and argument, amongst members of 'the industry' as well as outsiders.
What do you mean by 'industry standard'? Do you simply mean that you believe it to be 'common practice' or have you seen it being formally proposed/advocated as an 'industry standard' by some 'official body' (ideally other than NICEIC!)?
Kind Regards, John
1) It makes sense to deprecate the use of black for neutral.
2) It makes sense to use grey for neutral because that's L3, as was blue.
3) It makes sense to use grey for neutral because it's a neutral colour.
3 bis) It makes sense to use brown for the cpc, as what colour is earth?
3 is maybe less serious than 1 & 2.
2) It makes sense to use grey for neutral because that's L3, as was blue.
3) It makes sense to use grey for neutral because it's a neutral colour.
3 bis) It makes sense to use brown for the cpc, as what colour is earth?
3 is maybe less serious than 1 & 2.
That's what I suspected, and I would suggest that what you now say is very different from it being an "industry standard". We've seen some members of the industry supporting the use of black - so it's clearly not a totally straightforward situation.
Kind Regards, John
They are, IMO, both perfectly reasonable arguments. As I said, I've always used grey, but I'm not totally sure why I adopted that practice/convention.
I certainly agree with "3 bis)" - but I thought it was you who accused me of 'whinging about change' when I expressed my concern (for that reason) that brown has been selected for line (even though it is 'here to stay'!)?
Kind Regards, John
I was talking about what cores to use in a 3-core (Br/Bl/G) cable.
I realise that, but:
... was seemingly an acknowledgement of the reason why I was always a bit surprised that brown was chosen for line!
Kind Regards, John
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