marking/phasing

[fin]

I seem to remember that one could only use phase tape on #4 and larger, I cant find this in the NEC art. 200. Could I phase #10, 8, or 6 (#10 purple, yellow, #8 and 6 blue and red? The code book says you identify by system, what does that mean?

 

[guschash]

marking/phasing

310.12(C) send you to 210.5 ( C ) for branch circuits and 215.12 for feeders. They want to identified by systems meaning 120V, 208V, and 480V systems. 277/480----Brown,Orange,Yellow,Gray 120/208---Black,Red,Blue,White

 

[raider1]

I seem to remember that one could only use phase tape on #4 and larger, I cant find this in the NEC art. 200. Could I phase #10, 8, or 6 (#10 purple, yellow, #8 and 6 blue and red? The code book says you identify by system, what does that mean?

Take a look at 200.6(B) for identifying grounded conductors larger than #4.

The NEC requires that if you have more than one nominal voltage system you must identify the ungrounded conductors of each system. This only means that each system ie. 277/480 and 120/208 be identified for the voltage system not for each phase. So I could have black for my 120/208 volt system and red for my 277/480 volt system.

Typically what I see is 120/208 volt systems marked black/red/blue and 277/480 volt systems marked brown/orange/yellow or brown/yellow/purple.

You are permitted to phase tape ungrounded conductors of any size. The only sections that require wires under #4 to be a continious color is 200.6(A) and 250.119 for equipment grounding conductors.

Hope this helps,

Chris

 

[cowboyjwc]

Actually there is no color code based on voltage (brown, orange, yellow). You can identify it with any color other than white, grey or green, but you must list at the panel board the color and the phases that they correspond to.

Now I know there are other factors such as a stinger leg, but that wasn't the question.