208v/22 amp at home?

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  #1  
Old 10-04-11, 02:14 PM
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208v/22 amp at home?

I have an opportunity to buy back a 90 gall compressor from my company. Have OK from bosses, but just today realized that it's 208V/22amp single phase electrical motor listed.

I live in a regular house, with standard 127V supply.

Is it doable to have outlet wired for this compressor, or it will be blowing everything every time it starts? I sort of need a large compressor, but it's not a must, if it will cost me arm and leg to install and continuous headache later.
 
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  #2  
Old 10-04-11, 02:25 PM
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Is the motor rated for 240/208V or 208 only? A buck/boost transformer would be required if not.
 
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Old 10-04-11, 03:08 PM
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Your house likely is 220 volts so I am sure the motor voltage will be fine.

I'll take a wild guess and say if it is a two stage pump, for that amperage it could put out around 12 or more cfm @ 90 psi.
This is a fair amount of air and would be an asset any hobbyist would be glad to have.
It would open up the opportunity for large consumption tools like sanders and sandblasters.
 
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Old 10-04-11, 04:43 PM
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I live in a regular house, with standard 127V supply
That would be very odd. Today's residential supply is 240 nominal with 120v derived from the supply transformer's center tap (AKA neutral) and one leg of the 240v.

If, as Justin asked, it is 240/208 no problem. In fact on 240v it will use less amps, about 19-20 amps.
 

Last edited by ray2047; 10-05-11 at 01:13 AM.
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Old 10-04-11, 05:25 PM
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well, best I know, if I stick voltmeter into wall outlet, it's showing 127V. House is not even 10 years old.
Anywhere I can look on the main panel to find out if it's safe to do?

I do work on my cars, my current 20 gall compressor is chocking on most power tools. That's why I am so interested in the larger compressor. I'll post pic of compressor electrical panel with all the specs off it tomorrow.
 
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Old 10-04-11, 05:33 PM
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That is within the allowed variance. I believe that 120V can vary up to +/-1 10%. The 127V you see is from one half of the 240V that supplies your house. If you check the voltage between the two hots of an electric dryer, stove or at the disconnect for your A/C. All of these would be running off of 240V.
 
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Old 10-04-11, 05:41 PM
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so, basically, it is OK to have that compressor? Of course, will have to hire someone to wire it in. Any guess how much a job like this costs?
 
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Old 10-04-11, 05:51 PM
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I believe it will depend and what Justin said. Is the motor rated truly for just 208v or 208/240v.

Can you take a picture of the specification plate on the motor?

What I was saying is that the 127V you are seeing is within the allowed variance of Nominal 120V supply and 240V - 10% (24V) is 216V.
 
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Old 10-04-11, 05:53 PM
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yes, compressor is at work. will post pic tomorrow.
 
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Old 10-04-11, 06:15 PM
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Of course, will have to hire someone to wire it in. Any guess how much a job like this costs?
It's a fairly easy DIY job. It'll take an afternoon if that.
 
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Old 10-04-11, 06:31 PM
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I don't think I've ever seen a single phase 208 volt motor. I think it would be safe to assume it's a single phase 240 volt motor that was previously connected to a 208 volt service. I don't think you have a problem except for maybe needing to purchase a single phase starter, assuming you aren't getting the starter with the compressor. Or, it's possible the starter is built into the compressor. Pictures would help a lot.
 
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Old 10-04-11, 06:32 PM
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Originally Posted by Justin Smith View Post
It's a fairly easy DIY job. It'll take an afternoon if that.
easy to say. I am dumm electrically. Basic stuff only.
 
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Old 10-04-11, 06:47 PM
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Originally Posted by ukrbyk View Post
easy to say. I am dumm electrically. Basic stuff only.
It's not really that difficult. If you get all the nameplate data from the motor, someone here can walk you through installing the proper amperage circuit and connecting the compressor. A picture of the motor nameplate would go a long way toward getting you started. Then, once the compressor is up and running, you can give us your opinion on what type antifreeze to use in a 2004-2008 Ford F-150 pickup with a 5.4L V-8.
 
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Old 10-04-11, 07:49 PM
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Originally Posted by CasualJoe View Post
It's not really that difficult. If you get all the nameplate data from the motor, someone here can walk you through installing the proper amperage circuit and connecting the compressor. A picture of the motor nameplate would go a long way toward getting you started. Then, once the compressor is up and running, you can give us your opinion on what type antifreeze to use in a 2004-2008 Ford F-150 pickup with a 5.4L V-8.

I am frugal person. Though it may call for some fancy OEM Ford coolant, any parts store now sells a more cost efficient version that "is guaranteed to be safely mixed with any color antifreeze". It's Ford, should not be an issue. GM had major problems with mixing their Dexcool with aftermarket ones, or distilled water. It simply gums up and kills cooling system then.
 
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Old 10-05-11, 12:27 AM
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If this compressor is coming from an industrial facility I'd almost bet money that it is a 3-phase motor and that will NOT be compatible with a single-phase residential service.

Check the motor nameplate. If it says 208-230 /460 (or 480) volts then it IS a three-phase motor. If it says 120/208 (or some other higher voltage) then it is probably a single phase motor.

It may still be a good deal if it is a three-phase motor. You would have to purchase a new (or used) single-phase motor to use at your residence.
 
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Old 10-05-11, 08:42 AM
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it's 80, not 90 gall. still nice.
 
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Old 10-05-11, 08:56 AM
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Volts is listed as 208-230v, single phase, so it will work on a residential feed. You're good to go.

It appears it is hard wired so I'd suggest add a cord set with a NEMA 6-30P plug and install a NEMA 6-30H receptacle.
 
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Old 10-05-11, 09:24 AM
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Good news! That baby will work at home on a 30A, 240V circuit. Also spot on about the Dexcool, I lost two radiators in Chevy Blazers to that crap.
 
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Old 10-05-11, 09:28 AM
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he-he. you guys know your stuff, I know mine. Dexcool, I mean. thanks all for help!
 
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Old 10-05-11, 07:07 PM
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The opinion I was looking for is Zerex G-05 with HOAT technology.
 
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Old 10-05-11, 07:47 PM
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Originally Posted by CasualJoe View Post
The opinion I was looking for is Zerex G-05 with HOAT technology.
you deserve it. ----------------
 
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