I've looked in Art 215. A question put to me was "Is there anywhere in the code that dictates the ID of phases for feeds & sub-feeds?" The only place I can remember putting colored tape on phase conductors was from the spec's on a job. Comments requested. Best, Lyle
I have identified motor circuit conductors with T1,T2, and T3 before with wire markers and used all black wires. The conductors were identifed at all boxes and terminations.