I thought the wire code had to do with the voltage not if it was always energized.
name the five colors associated with a 120/280V Y three phase panel - red, blue, black, green, white neutral
name the five colors associated with a 277/480V Y three phase panel - brown, orange, yellow, green, gray neutral
From NFPA 79:
13.2.4.1
The color ORANGE shall be used to identify ungrounded conductors that remain energized when the main supply circuit disconnecting means is in the off position. This color identification shall be strictly reserved for this application only.
You can use just plain orange, but most people include the red / blue stripe so you know if it is AC or DC voltage.