Everyone understood the standard pre 2004.
Pretty much sums it up.
Everyone understood the standard pre 2004.
Did they? What 'standard'. AFAIAA, with 'old colours' there was no more 'official guidance' (let alone anything 'mandated') as to which core of 3C+E one should use as neutral (if one wanted LLN) than there is now in relation to 'new colours', was there? Or am I wrong?I wasn't suggesting more cables with different colours. Everyone understood the standard pre 2004.As I've said, I agree that a universal (probably 'mandatory') convention would be desirable. However, to do without sleeving would mean the need to manufacture, and for people to buy or 'carry', cables with quite a few variants of colour configurations.
Not only did I point that out, but I also gave my opinion as to the probably answer - red and yellow were such well-established 'universal danger/caution colours' that they were the obvious choices for two L's, leaving only the blue for neutral. Indeed, for the same reason, if red and yellow were two of them, then the other one would be the obvious for neutral, almost regardless of what colour it was.As you point out, why was blue used as the neutral on a old 3 core cable?
Exactly. Red and Yellow for 'danger/warning' works, in most contexts, nearly all over the world (except, now, for electrical wiring in Europe ).You got a good point about the harmonised colours not looking 'dangerous' enough. As you say, the red and yellow look like warning colours.
Yes, possibly - and, as I said, if you'd asked me to tell you what three colours I thought least indicated 'danger/warning', I might well have come up with black, grey and brown!!If you was to remove the cover from a trunking in a factory, and saw all these brown, black and grey singles - you could be forgiven for thinking they may just be coax and cat5e cables.
I'm not sure that I've ever seen it, either - but the fact that people may have 'known' what was going on does not necessarily make it compliant. I don't think it would be compliant to have an 'old colours' cable in which both L(s) and N(s) correctly identified (by over-sleeving if necessary) in terms of those 'old colours'.As you say, I don't think I have ever seen a blue cable with black sleeveing, because ppl knew if the cable required a netural blue would be used.
Nor me - and, as I've said, it would be very odd. Yellow (like red) is so 'obviously' a 'warning/caution' colour that, if one wants LLN, it would be crazy not to use yellow and red for the Ls.I have never seen a yellow used for neutral.
If cables are correctly identified (with over-sleeving if necessary) in a reg-compliant fashion, there is nothing to 'work out'.Now in addition you have to work out what convention has been used.
It's not a question of want to; It doesn't matter.So why would anyone want to use anything else?
As I've said, I personally wouldn't.Which brings me back to my original point. Everyone used used blue on an old 3 core+e as N. Blue was replaced for grey following harmonisation. So why would anyone want to use anything else?
As I've said, probably not 'as illogical' to those who feel that yellow is associated with 'warning' whereas black feels very 'innocuous'.Using a new black as N is as illogical as using an old yellow as N.
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