Yaktx wrote:
There is an additional restriction on orange, which must be and may only be used on the 208V-to-ground leg of a four-wire delta, if such a system exists on the premises.
Orange is not forbidden to be on other phases and systems. 480V systems are typically Brown, Orange, Yellow.
You could mark all three conductors orange in a midpoint-grounded delta system. It just wouldn't be very helpful.
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