Tray Cable Color code

[mooreaaryan]

My supplier is telling me that black white green #12 tray cable is going to be hard to get. I have a lot of lights and receptacles to install if forced due to time restrictions could i use different color wire. This will be an industrial establishment with only Certified electricians doing maintenance.

 

[don_resqcapt19]

200.6(E) Exception #1, and 250.119(B).