And the new system is much better. Previously, when grubbing around in the back of oily machinery, in poor lighting it was easy to get confused with red yellow and blue wires ... the black/grey/brown colour scheme is much easier to see ... errm?
On Thu, 12 May 2022 at 10:52, andy pugh <[email protected]> wrote: > On Thu, 12 May 2022 at 06:31, Philipp Burch <[email protected]> wrote: > > > I could imagine that the colors are due to the usual coding (at least in > > Europe) for AC circuits with brown=Phase (hot wire) and blue=Neutral > > (cold wire). > > UK fixed household wiring used to be red for live and black for neutral. > Then three-phase was red-blue-yellow with black neutral. > > In 2006 we harmonised with Europe, so that it is blue neutral, brown > live and three-phase is brown-black-grey with a blue neutral. > > So, now when you find a wire: > > green/yellow - always earth > black - live or neutral > blue - live or neutral (already the case before harmonisation) > brown - live > red - live > yellow - live > grey - live > > In fairness, appliance flex has always been brown-live blue-neutral > for as long as I have been wiring plugs, so it makes sense for the > fixed wiring to match. But the colour choice for 3-phase seems odd. > > -- > atp > "A motorcycle is a bicycle with a pandemonium attachment and is > designed for the especial use of mechanical geniuses, daredevils and > lunatics." > — George Fitch, Atlanta Constitution Newspaper, 1912 > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
