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M

Mikey

When using a cable that has brown black and grey and you want to use them as live, neutral and earth, which colours do you normally use for the neutral and earth, am i right in thinking

Brown - Brown

Black - Green yellow sheathing

Grey - Blue Sheathing

Thanks
 
There was a publication (I think by NICEIC) which said about trying to get away from using black as a neutral, so as you suggested in your first post. Cable colours - IET Electrical
 
I don't see what difference it makes if you're sleeving it -

...in fact, surely it would be safer......if the blue sleeve fell off the black conductor, anyone old-school would think it's a neutral anyway......if the green/yellow sleeve fell off the black conductor, no-one's gonna think it's a CPC.
 
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i prefer the green/yellow soil. for EMs i use black as perm L. brown as SW/L, grey as N. by using these colurs when you have a mix of EM and non-EM's, then brown is SW/L throughout.
 
I like to use the brown as P/L as the terminal is often marked L1, the black as S/L as the terminal is often marked L2.
I prefer to have a mix of browns and blacks for S/L as then it is obvious to anyone taking the switch front off, that there is an item of equipment with a P/L.
In any event, when having to use the black for either the P/L or S/L, it leaves only the grey available for use as a neutral. I wouldn't like to leave an installation with a mixture of black and grey neutrals, with other greys being used as CPCs.
 
Last edited by a moderator:
on a single phase cable Technically when the cable is over sleeved or marked (with the exception ofsingle core green and yellow )the over sleeve takes president of the underneath and there fore any combination can be used ,how ever a convention has generally accepted of over sleeving or marking the black green and yellow (CPC) and the gray with blue ( Neutral) the thinking of this has been done with the aime of helping dissasociate the black with the neutral and the shade of gray being a neutral colour , on a 3 core L , L1/SL, N ,CPC the black will become the switch live and be sleeved with brown sleeving

Part of this is an answer from the ECA today

Nick
 

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