Air Compressor Wiring Proposal Plz Check

[bugnut]

I have a CH compressor. It is CH#hs5180000 sold by HD.
I have a 50amp circuit terminating in an outlet (nema 6-50r 50a-250v) in 2 distant locations in my shop.
I want to be able to use the compressor in either location.
I propose to wire in the following manner:
Male plug to match 50amp outlet with #8 wire to a Sq D box (qo2l30scp) with a Sq D (hom130cp) 30 amp breaker
from there with #10 wire to feed the compressor
images below show #12 wire from compressor switch to motor, this is the factory wiring.
The white outlet is a 20amp for the previous compressor. I will be unused but remain.

Am I missing anything?

TIA

 

[brewchief]

You won't find a 50 amp plug or receptacle thats horsepower rated unless you go to a pin/ sleeve style. Motors over 3 hp typically need to be hardwired..

Wire size for motors is based off of a table, #10 would be to small in nm-b but thhn in conduit would be ok.

Sent from my SM-G965U using Tapatalk

 

[bamawildcat]

You won't find a 50 amp plug or receptacle thats horsepower rated unless you go to a pin/ sleeve style. Motors over 3 hp typically need to be hardwired..

Wire size for motors is based off of a table, #10 would be to small in nm-b but thhn in conduit would be ok.

This. Also, you mention distant locations of your shop. If you are over 50 feet from your panel, or access is obstructed between the motor and panel (door, partition, cage), you will need a motor rated means of disconnect at the compressor, such as a disconnect switch or pin and sleeve like mentioned above.

 

[exranger06]

I would keep the compressor in one location and hardwire it. If you need air in multiple locations, install air piping to those locations.

 

[wyliesdiesels]

I have a CH compressor. It is CH#hs5180000 sold by HD.
I have a 50amp circuit terminating in an outlet (nema 6-50r 50a-250v) in 2 distant locations in my shop.
I want to be able to use the compressor in either location.
I propose to wire in the following manner:
Male plug to match 50amp outlet with #8 wire to a Sq D box (qo2l30scp) with a Sq D (hom130cp) 30 amp breaker
from there with #10 wire to feed the compressor
images below show #12 wire from compressor switch to motor, this is the factory wiring.
The white outlet is a 20amp for the previous compressor. I will be unused but remain.

Am I missing anything?

TIA

This is not gonna work

Since the motor is 5HP, it will need to be hardwired. A nema 6-50p and r is not rated for 5HP

circuit wire for 5HP will need to be 35a rated, so #10 THWN or #8 NM-b.

The wire on the compressor is listed and not the same wire as building wire so you cant compare the 2.

If the compressor is more than 50' from and not within sight of the panel, then you will need a local disconnect. An A/C (air conditioning) pullout disconnect will work for this.

 

[u2slow]

I have a CH compressor. It is CH#hs5180000 sold by HD.
I have a 50amp circuit terminating in an outlet (nema 6-50r 50a-250v) in 2 distant locations in my shop.
I want to be able to use the compressor in either location.
I propose to wire in the following manner:
Male plug to match 50amp outlet with #8 wire to a Sq D box (qo2l30scp) with a Sq D (hom130cp) 30 amp breaker
from there with #10 wire to feed the compressor

That will work just fine, and be reasonably safe.

The limitation being its not safe to unplug the compressor while running. And no, it won't meet Code.

 

[Bigblockyeti]

I have a CH compressor. It is CH#hs5180000 sold by HD.
I have a 50amp circuit terminating in an outlet (nema 6-50r 50a-250v) in 2 distant locations in my shop.
I want to be able to use the compressor in either location.
I propose to wire in the following manner:
Male plug to match 50amp outlet with #8 wire to a Sq D box (qo2l30scp) with a Sq D (hom130cp) 30 amp breaker
from there with #10 wire to feed the compressor
images below show #12 wire from compressor switch to motor, this is the factory wiring.
The white outlet is a 20amp for the previous compressor. I will be unused but remain.

Am I missing anything?

TIA

Sounds perfect, I ran my 7.5hp Quincy off a 50A 250 plug and it worked perfect. No need to over think it or add a bunch of expensive **** that would be needed in an industrial environment just for a home shop, especially when powering an SPL horsepower motor.

 

[wyliesdiesels]

Sounds perfect, I ran my 7.5hp Quincy off a 50A 250 plug and it worked perfect. No need to over think it or add a bunch of expensive **** that would be needed in an industrial environment just for a home shop, especially when powering an SPL horsepower motor.

Umm the OPs motor is NOT listed as SPL. It is listed as 5HP. The plug is not rated for 5 HP or 7.5HP.

Theres a reason code requires this to be hardwired. Nothing is being over think [sp] nor is the stuff needed to comply with the code, expensive. It also has nothing to do with being an industrial environment.

your comment is illogical, not to code, nor makes any sense.

 

[Bigblockyeti]

I researched CH's chinese motors before passing, they might not identify as SPL but they are.

 

[wyliesdiesels]

I researched CH's chinese motors before passing, they might not identify as SPL but they are.

Umm the OPs motor is listed as 5HP and 22a FLA.

Thats the correct amperage for a true 5HP motor so its not SPL rated.

 

[ard]

I would keep the compressor in one location and hardwire it. If you need air in multiple locations, install air piping to those locations.

My thought as well. Unless the shop is like 45,000 square feet.

Hardwire w a piece of flex. Run some copper air pipe, couple of drops.

Would be a solid install, with no dragging the compressor around!

 

[bugnut]

Thanks to all for the replies. I'll see if I can get it hardwired and leave in one location. Shop is 30x40 so getting air everywhere is not an issue. Again Thanks All!

 

[CarFire]

I used this calculator alot for run lengths and quality.

https://www.southwire.com/calculator-vdrop

Use 1 for parallels. 50 Amps requires 6gu wire for the amapacity.

 

[u2slow]

50 Amps requires 6gu wire for the amapacity.

Both being overkill for a 5HP/240V compressor...

 

[wyliesdiesels]

I used this calculator alot for run lengths and quality.

https://www.southwire.com/calculator-vdrop

Use 1 for parallels. 50 Amps requires 6gu wire for the amapacity.

That calculator has some issues.

Better to just do the wire calcs yourself. I posted the formulas in the electrical FAQ sticky

Also, a circuit with #6 is way overkill for a 5HP compressor.

 

[sberry]

If its a cable its a size up, not a fatal flaw and cost depends on length. But I agree some of those calculators just don't seem right for lack of better words.

 

[bugnut]

All, sparky was out and hardwired with a suitable switch we're off and running. Filled with synthetic oil and did the one hour run in, all seems to be in good shape. Plumbed everything to the hose reel so we are ready to go.
Thanks to all!

 

[1Garageman]

Bugnut, hello fellow Ohio'an. Do you have any updates on the wiring for your compressor? And are you happy with the CH compressor?

 

[AP514]

I would keep the compressor in one location and hardwire it. If you need air in multiple locations, install air piping to those locations.

I totally Agree