Another color code question that's just occurred to me:
When you run a single-phase 120V branch from a single-pole C/B at a 120/208 3-phase panel, do you always use black for the hot or do you match it with the appropriate phase color? (Im talking conduit systems; I assume if the 120V branch were Romex it would pretty much have to be black.)
How about a single-phase 277V branch run from a 277/480V panel? Brown & gray? Matched to the brown, yellow, orange (or purple!) phase?
When we run a 1-ph. 240V branch from a 3-ph. 240/415V panel, the hot is always red, even if the breaker is on the yellow or blue phase.
