Phew, thanks for all the replies.
#1. Switch cables.
I asked about this because it's done the opposite way here. Just to refresh your memories, our normal colors are line=red, neutral=black. On switch drops we use red as the live feed and black (tagged red) as the switched output to the light.
I take your point about ending up with two white wires for the light, as obviously our system means we end up with two blacks.
This isn't "code," by the way, but I've never seen one wired the other way. The IEE just specifies that if a black wire is used for anything other than a neutral it should be marked accordingly. The black live on switches often ISN'T marked, however.
#2. 277/480V wiring.
I'm getting a little confused here. Phase colors on 120/208 are normally black/red/blue, but someone here said that on a single-phase branch you just use black, because a single-pole C/B could get moved to another phase so identifying the phase on a 1-ph branch would be pointless.
I understand that, and with different colors follows standard practice here. (Phase colors red/yellow/blue, 1-ph branches always red.)
So..... Why then would you identify the phase on a 277V 1-ph branch from a 277/480V panel? Surely a single-pole 277V C/B could get moved to another phase as well? I'm puzzled.....
Re NEC definitions: Yes, I realize that the NEC doesn't specify "hot" or phase colors specifically and only reserves white/gray/green (plus high-leg orange).
Thanks.
