Motor circuit

[nickelec]

How would you guys size the circuit for this motor I'm coming up with #10s on 40a breaker

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[augie47]

I can't read the post.. what's the HP & voltage ?

 

[nickelec]

Here

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[nickelec]

I can't read the post.. what's the HP & voltage ?

Voltage is 277/480 3 phase the HP is what I have an issue finding here

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[nickelec]

I'm assuming I would use the 100% HP being 10hp

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[nickelec]

Anyone?

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[David Castor]

It's 10 hp. At 460 V, that's 14 A per NEC. 1.25 x 14 = 17.5 A. Conductors have to be rated 17.5 or higher. Molded case breaker should be 25 A. In theory #14 AWG would work if rated 75 deg C (along with terminations). #12 AWG is probably better.

 

[augie47]

Per NEC, it would be a 35 amp breaker (430.52 @ 14amp). The chart seems to indicate it might be called upon to run at 1.;25% so I would lielly go with a 12 minimum (albeit a 14 meets Code).

 

[nickelec]

Ty all but here in the great city of NY #14 is illegal it's #12 minimum

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[augie47]