Three phase

[Gabricka]

Hello everyone, here in Canada we use red , black ,blue colors to represent phase A , B and C. What colors do you use in the United States ?

 

[tom baker]

There is no NEC requirement for the ungrounded conductors.
Neutral is white or gray
Other are commonly:
120/240 Black/Red
120/208 3 ph Black/Red/Blue
277/480 Brown/Orange/Yellow

 

[JohnJ0906]

As Tom said, there is no NEC requirement, but there are some local requirements.

http://resources.co.ba.md.us/Documents/Permits/ElectricalInspections/elec_color_code.pdf

 

[Rewire]

what ever colors you start with you have to use throughout the system