Wiring PIR sensors, Extractor fans, LED panel lighting, overide switch. In one circuit

ebee:

I`d never use Black in a 3 core for N and that stems partly from the phase rotation jobby I mentioned.


Mind you I am out of kilter with a lot of folk with my 3 core for two way switching configuation. I know I`ve mentioned it before but Both Browns say L1 = perm L., Black sleeved Brown and Blue sleeved BrBrown into L2 and Finally Grey sleeved Brown as C. Of course I was brung up with Reds for L and Black for N, and R/Y/B for 3 phase, well I know some might think I`m old enough for white as 2nd phase but no I am not quite that old.

I was initially attracted to this thread by its reference to toilets etc., and recollections of my "oh dear!" moment. However I have followed the subsequent progression to identification colours with interest.


I don't know quite how old is meant by "old", but the idea of white for one of the phases seems to have occurred at various times.


It was around 1970, I think, that the new colours, i.e. brown for live, blue for neutral, green and yellow for earth, were introduced for flexible cords, round about the time also that sizes moved to metric. I wondered at the time why fixed wiring colours were remaining unchanged but nobody seemed able to answer that question.


I seem to recall at some stage subsequently a proposal that the three phase identification change to brown, white and grey. There seemed some sense in selecting white; it was not used for another purpose, it was bright, like yellow, and there seemed to be a historical link.


The present use of black as in identifier does seem to beg confusion with the old neutral. Much fixed wiring with the old red and black colours still exists and will continue to be there for a long time, so inevitably there will be cases of new wiring joining older with old colours.


Can anyone else remember the proposal for white, and why it "gave way" to black?

ebee:

I`d never use Black in a 3 core for N and that stems partly from the phase rotation jobby I mentioned.


Mind you I am out of kilter with a lot of folk with my 3 core for two way switching configuation. I know I`ve mentioned it before but Both Browns say L1 = perm L., Black sleeved Brown and Blue sleeved BrBrown into L2 and Finally Grey sleeved Brown as C. Of course I was brung up with Reds for L and Black for N, and R/Y/B for 3 phase, well I know some might think I`m old enough for white as 2nd phase but no I am not quite that old.

I was initially attracted to this thread by its reference to toilets etc., and recollections of my "oh dear!" moment. However I have followed the subsequent progression to identification colours with interest.


I don't know quite how old is meant by "old", but the idea of white for one of the phases seems to have occurred at various times.


It was around 1970, I think, that the new colours, i.e. brown for live, blue for neutral, green and yellow for earth, were introduced for flexible cords, round about the time also that sizes moved to metric. I wondered at the time why fixed wiring colours were remaining unchanged but nobody seemed able to answer that question.


I seem to recall at some stage subsequently a proposal that the three phase identification change to brown, white and grey. There seemed some sense in selecting white; it was not used for another purpose, it was bright, like yellow, and there seemed to be a historical link.


The present use of black as in identifier does seem to beg confusion with the old neutral. Much fixed wiring with the old red and black colours still exists and will continue to be there for a long time, so inevitably there will be cases of new wiring joining older with old colours.


Can anyone else remember the proposal for white, and why it "gave way" to black?