On Thu, 12 May 2022 at 06:31, Philipp Burch <p...@hb9etc.ch> 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
