Wiring for Air Compressor

[scout4bta]

Need advice for the following:
The compressor I'm installing is a 5 hp 230v according to the motor id plate.
The Amp ratings is 22A, will a 30 amp breaker work?
The conduit run to the compressor is about 40' from the panel. I plan on pulling 2 10 awg stranded and 1 12 awg solid for ground in 1/2 conduit, that would be 2 90° bends and a couple of offsets.

Is all this to code?

 

[pattenp]

The ground needs to be a #10 also. Being hardwired you can used a larger breaker on the #10 if the compressor trips the 30A, but it should be okay. You need to wire based on HP of motor, not the amps listed on the motor.

 

[mm08822]

As long as the 10's are xhhw or thhn/thhw cu they will be the right size. Wire needs to be rated for 35a. (28 x125%)
The grd has to be #10 at least in the flexible conduit. Not needed in the conduit if emt. 12 would be a code violation.

If your panel is in direct line of sight to the compressor, then a disconnect is not needed but it does make a convenient transition to a flexible wiring method. Just make sure it is rated for 5 hp minimum.
I would use a 40 or 50a cb for this motor circuit. I would expect a 30a to trip.

 

[scout4bta]

I'm using EMT, would using 12 awg for ground in this be a code violation?

 

[wyliesdiesels]

Dont use an outlet and how far away is the panel?

 

[wyliesdiesels]

I'm using EMT, would using 12 awg for ground in this be a code violation?

Yes. Min size is #10.

But you dont need an egc since conduit is metal.

 

[scout4bta]

The compressor is directly across form the panel about 26'. Yes know that the compressor must be hardwired.