277/480v service

[phil laxague]

we're running 2 parallel feeders from a 480/277v transformer to a 600amp main distribution panel. what size feeders do we need aluminum or copper. this will be four wire, 3 phase. thanks

 

[jumper]

Well, what size do you think you would need and why?

 

[lielec11]

we're running 2 parallel feeders from a 480/277v transformer to a 600amp main distribution panel. what size feeders do we need aluminum or copper. this will be four wire, 3 phase. thanks

You'll have better luck getting help if you at least try and workout the issue or show us that you've thought about it in some way or form. Do you know which chart to reference in the NEC that gives you cable ampacities?

 

[don_resqcapt19]

Where is the switch located at in relation to the transformer? Is the neutral conductor required to be a current carrying conductor? (nonlinear loads?)