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Rewire compressor motor for 110

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Trevor

06-17-2002 08:04:50




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I have a early 80's Craftsman air compressor that is currently wired for 220V. My new shop only has 110, so I'd like to rewire the motor for 110. Where can I find a diagram that shows me how to do this???
Than




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MarkB

06-17-2002 18:37:38




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 Re: rewire compressor motor for 110 in reply to Trevor, 06-17-2002 08:04:50  
You might be able to wire it for 110V, but you'll go nuts resetting the circuit breaker every time you use it. It's guaranteed that the breaker will pop when it's least convenient. Also, the missus probably won't like it when you track grease over the carpet on your way to the breaker panel.

It will cost a few bucks to run a 220V circuit, but it's cheaper than a trip to the looney bin. Besides, you'll need the 220 circuit for that arc welder you're gonna buy next week.

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G Taylor

06-17-2002 16:07:05




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 Re: rewire compressor motor for 110 in reply to Trevor, 06-17-2002 08:04:50  
1 Hp is about max for a 15 amp 120V circuit. On occasion a high efficiency 1-1/2 Hp with electrolytic power factor correction capacitors and dry start capacitors gets factory wired with a 15amp 120V plug. It's a stretch however. A single phase motor on a hard starting reciprocating load needs all the help it can get. Use 240V & heavy enough wire. If your garage has a single circuit with all lights & plugs on one it's time to run a dedicated 120/240V circuit to the garage & install a 30 or 60 amp pony panel.

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Mac

06-17-2002 14:43:58




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 Re: rewire compressor motor for 110 in reply to Trevor, 06-17-2002 08:04:50  
I got a sears compressor in 89, no where in manual does it tell about different wiring, 110/220. 2 capicitors on top of motor. Wiring directions tho are underneath the plate on motor that covers wire attachment screws, on how to wire for 110 or 220. I have always used the 110.



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walt

06-17-2002 12:53:34




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 Re: rewire compressor motor for 110 in reply to Trevor, 06-17-2002 08:04:50  
Look for a data plate on the motor. If it shows 11o/220, then its switchable. Remove the cover plate where the cord enters the motor. Normally the screws are labeled how to wire for 110/220. But 110 may not provide enough juice to run it properly.



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bill b va

06-17-2002 12:52:17




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 Re: rewire compressor motor for 110 in reply to Trevor, 06-17-2002 08:04:50  

look to see if there is a little box with a cover plate where the cord goes into the motor. if there is take the cover plate off and the diagram should be on the back side of the cover plate .if so you will also need to put a 110 volt plug on the cord . the motor name plate HP/amps will determine amphere rating of the plug and circuit it can be connected to



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Neil

06-17-2002 08:52:13




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 Re: rewire compressor motor for 110 in reply to Trevor, 06-17-2002 08:04:50  
Call Sears service to get a manual.
If it can be done it will be in the manual.
One of the few things I like about Craftsman is the long term parts and service information.
P.S. Even if it can be done, I would look into running a 220 outlet. The compressor will run better, and you will have it there for the future.



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slughammer

06-17-2002 08:49:02




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 Re: rewire compressor motor for 110 in reply to Trevor, 06-17-2002 08:04:50  
Depends on the motor and whether it was intended to be run on either voltage or not. If it was only intended for 220V, I don't think that you can switch it and stay within amperage and heat capabilities of it's design. I have the same one and everytime I move to a new house, I gotta run more wires. I sure hope one of the sparkys out there replies back and says that I'm wrong (I've been in this house almost 2 years and the compressor is in the basement 3 feet from the breaker box and 70 feet from the garage). - Slughammer

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