Brain Tease: Neutral current on a 3ph 4wire 277/480 system (contractors)

[jar546]

Had to brush off my rust for this one.

What is the neutral current on a 3ph, 4 wire 277/480vac system with the following current draw on the phases?

A=160A

B=180A

C=100A

I guess you can reduce the neutral size on this one..LOL

 

[chris kennedy]

I got 72A considering no inductive/non-linear loads. Don't know how to post the formula, problem with square root symbol.

 

[jar546]

Damn you Chris! Right on the money! Congrats and thank you. 72.11 so I will have to give that one to you

 

[jar546]

I am going to have to throw you a feeder circuit problem for 8 motors of something like that. I just don't think I can stump you!

 

[chris kennedy]

Damn you Chris!

Love you too, Happy Valentines Day.