In what situation is it appropriate to use different colored 4/0 gauge wire?

[SolarTNS]

Hi All,

Background: I work for a solar and electric distribution company and I joined this forum to help myself learn about the more uncommon parts that are sold less often.

Question: In what situation is it appropriate to use different colored 4/0 gauge wire? I understand that amperage reasoning, but, for example, is there a reason why blue 4/0 wire would be used instead of black?

 

[Megawatt]

Hi All,

Background: I work for a solar and electric distribution company and I joined this forum to help myself learn about the more uncommon parts that are sold less often.

Question: In what situation is it appropriate to use different colored 4/0 gauge wire? I understand that amperage reasoning, but, for example, is there a reason why blue 4/0 wire would be used instead of black?

Solar I’m going to assume that you are talking about 3 phase power or single phase but all 4/0 wire is black. On a 3 phase system at 480/277vac they should be taped PHASE A is brown PHASE B orange and PHASE C is yellow. On a single phase system PHASE A is black and PHASE B is marked red. Some people use blue on phase B on a single phase system