430.24 Question

[jtgrace87]

I am trying to size a feeder breaker that contains multiple motors. There is a total of 19 3HP motors on one feed @ 4.8A a piece. I am using 430.24 to size my feeder. With that being said, here are my calculations:

1.25*4.8+4.8(18)= 92.4A

I would use a 100A feeder. Can someone confirm.

 

[RichB]

Take a look at 430.52 and Annex D Example D8 last paragraph--If I had more time I could run down the math but I gotta run

 

[Smart $]

...
I would use a 100A feeder...

Technically, you can use a 92.4A feeder...