3 Core And Earth Colours
- Thread starter Bobbya82
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Pl = brown
sl = black sleeved brown
n = grey sleeved blue
sl = black sleeved brown
n = grey sleeved blue
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thanks, assume the grey is a neutral then if it’s black grey brown
Blue ??
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There is only Brown is Line.
The other two should be sleeved representing their function - Brown for Switched Line and Blue for Neutral.
3 core has grey brown black, so sleeve the grey with blue sleeving, tape ?
Yes, if the Grey is being used as Neutral.
A lot of people think that the Grey should be used for Neutral (but Black used to be Neutral in the UK).
Either way, no one will ever be able to assume an unsleeved Grey is Neutral because it might not be.
Yep, as EFLI said, IF it is being used as a neutral. (preferably sleeving, rather than 'tape')
Kind Regards, John
They do - seemingly to avoid people 'getting confused' by the fact that, as you say, black used to be neutral in UK.
The logic of that reasoning somewhat escapes me!
Kind Regards, John
Yes, #metoo.
Many will use the black (sleeved brown of course) for the permanent line to match the convention used in Hager Klik LSC roses.
Really it can only be identified by appropriate inspection and testing.
Really it can only be identified by appropriate inspection and testing.
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And I thought it was brown phase 1, black phase 2, and grey phase 3, and blue neutral if there is on, and bare or green/yellow for earth. With a single phase supply should be brown and other wires sleeved to show what they are, with no sleeves one needs to test.
Remember USA use white and black, so one can never assume colours. Only time I trust the colours is with motorised valves on central heating, with 110 volt site supplies we all know should be L1 and L2 marked on plugs and brown and black wires, and pigs might fly, never seen a 110 volt plug with L1 and L2 always says L and N, and the cable is always brown and blue, even when with 110 volt supplies there is no neutral. Unless in USA or a machine control circuit.
To try and say one uses grey as neutral is dangerous, as often people use the old colours, so black is neutral, or with old colours use new colours so blue is neutral, but we put brown to red, black to yellow, and grey to blue to bits.
Until harmonisation we had red, yellow, blue, and rest of Europe had brown, black, black. Grey only arrived when we harmonised so there is no real swap over for colours.
Remember USA use white and black, so one can never assume colours. Only time I trust the colours is with motorised valves on central heating, with 110 volt site supplies we all know should be L1 and L2 marked on plugs and brown and black wires, and pigs might fly, never seen a 110 volt plug with L1 and L2 always says L and N, and the cable is always brown and blue, even when with 110 volt supplies there is no neutral. Unless in USA or a machine control circuit.
To try and say one uses grey as neutral is dangerous, as often people use the old colours, so black is neutral, or with old colours use new colours so blue is neutral, but we put brown to red, black to yellow, and grey to blue to bits.
Until harmonisation we had red, yellow, blue, and rest of Europe had brown, black, black. Grey only arrived when we harmonised so there is no real swap over for colours.
You thought correctly - you almost seem to be suggesting that you now doubt yourself?
Indeed, in the same way that the blue ('if there is one') should be sleeved it is is used as anything other than a neutral - but then you would be talking about a 4C+E cable, whereas this thread is about 3C+E.
Kind Regards, John
Presumably only in countries in which 'over-sleeving' is allowed?
Of course. I was referring to the OP's question, based on his/her jurisdiction. It's far better to use correctly coloured cables though, without question.
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