Calculations

[Eric1119]

For a 480Y/277 volts panelboard, what color should be circuit number 27,28,29,30?:roll: Working on a big project.

 

[roger]

Eric, there is no color code for "these conductors" as far as the NEC is concerned, the answer would be specific to your study material.

Roger

 

[celtic]

For a 480Y/277 volts panelboard, what color should be circuit number 27,28,29,30?:roll: Working on a big project.

What ever the colors are for the A,B and C phases feeding the panelboard already [210.5(C); 215.12(C)]


Personally, I'd go with the "BOY"....29 & 30 being "Y" ~ remember the trick to divide by 6?

 

[Smart $]

...

Personally, I'd go with the "BOY"....29 & 30 being "Y" ~ remember the trick to divide by 6?

That would be assuming left are odd numbered spaces and right side are even numbered.