color coded mc

[GerryB]

Do you have to use 277 volt color coded mc cable for lighting in an office space. Obviously the outlets are 120 volt. The question is can you just re-identify the 277 volt conductors in the switch boxes, etc., or do you need to see the outer jacket identification?

 

[MiElectrician]

I don't believe there are any rules on ungrounded conductor color other than it can't be the same color as the grounded and grounding conductors. Is that what you're asking?

 

[augie47]

210.5(C) requires unique identification for branch circuit conductors when more than one voltage system is present in the premises. It doses not dictate how that identification must be accomplished (color code, tagging etc). I know of no requirement that the MC jacket be identified.
MC is available with different color conductors such as purple if desired.

 

[GerryB]

I don't believe there are any rules on ungrounded conductor color other than it can't be the same color as the grounded and grounding conductors. Is that what you're asking?

I actually meant the grounded conductor. The issue is all regular mc was run. Can the 277 neutral be marked gray at the termination points or does it need to be continuous, ie change the 277 v cable.

 

[peter d]

Do you have to use 277 volt color coded mc cable for lighting in an office space. Obviously the outlets are 120 volt. The question is can you just re-identify the 277 volt conductors in the switch boxes, etc., or do you need to see the outer jacket identification?

No, but it sure make a job with a mixed voltage a lot easier and removes a lot of the mistake factor. I strongly recommend it when you have 277 volt lighting.

 

[MiElectrician]

I'm glad you pointed that out. I had read that as a reason to mark voltage on the cover plates, but now I see you have to have phase as well. Also I don't think I've ever seen 210.5(C)1(B) followed

 

[don_resqcapt19]

The only requirement for identification of the grounded conductors of multiple systems are where they are in the same raceway or enclosure with the grounded conductor of another system. As long as the two system neutrals are not in the same raceway or enclosure, they both can be white or gray or any combination.
The ungrounded conductors of both systems, including the switch legs, must be identified as to system and phase and the identification method must be posted at each panelboard.