O.K. I am suffering a brain cramp this morning. Does anyone know of the NEC color codes for 220/240 three phase as well as 440/480 three phase?
There seems to be some arguments as to what colors are used. I did find an explanation as to using orange on the high leg albeit this not actually apply to a phase converter system.
My understanding was that the 220 volt three phase should be RED-BLACK-ORANGE(wild-leg).
But I did have an electrician tell me that the 440 code was YELLOW-BROWN-ORANGE. I thought it was YELLOW-BROWN-BLUE. Of course, if its Yellow-Brown-Blue, then which color is assigned the high leg?
Has anyone come across a concise article in the NEC that finally gets to the bottom of this? It seems that there may be some inconsise usuage here and I am not used to the NEC being anything but spot on. I am used to grabbing the book and getting the answer.