New 115 volt compressor motor blows fuse - can I convert to 220

by Felix Oquendo
(Loxahatchee, Fl 33470)

I just purchase a new Campbell WL371500AJ compressor motor to replace an obsolete one. It runs on 115 volts only and works fine when using it closed to the house. However, I'd like to use it on my shed, which is over 150 feet from the main junction box, but when I tried to run it, it blows the fuse.

I did some research and came up with a few solutions: use bigger gauge wire, but I'm already running 12 gauge electrical wire (10 gauge wire or larger is quite an expensive option); run a longer air hose, but that will lead to compressor cycling much more often; keep using compressor next to house, but it's a huge problem when painting a car.

If I could find a way to convert this motor (WL371500AJ) to 220 volts I could use 12/3 gauge cable and may be the best choice. Is it possible to convert the motor to 220 volts and how can it be done?

Thank you

Comments for New 115 volt compressor motor blows fuse - can I convert to 220

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Jan 28, 2015
pipes and tanks
by: Doug in

Regarding your 1/27/15 post:

Whether you need bigger openings and pipes depends on what your air is going to do, and for what length of time.

It's a little like a water supply - do you need a lot of water for a short time, or less (or even the same amount) water over a longer time?

That and how big the pump is, along with its duty cycle, dictate what you need to do.

I'd also point out that while electric wiring is not cheap, depending on your answers, pipe might be even more expensive. It sounds like maybe you intend to put the pump about half-way to the work area, yes?

So mainly, what are you planning to do with your air? Hobby, semi-pro, or production type stuff?

Jan 27, 2015
Larger Pipes?
by: Felix O

Thanks for all your responses. I never thought about plumbing from the compressor as an extension of the makes lots of sense though. Now, since running the compressor with 220 volts is out of the question, I decided to build a small shed close to the house to keep the compressor and run underground pipes from the compressor to the shed where I’ll be doing most of my work.

Now, I understand a larger tank is necessary when painting cars, especially if painting the whole car…as opposed to painting the car by individual sections. Will it make sense to house the compressor as I stated above and then adding an air tank at the other end of the pipes. In essence the compressor, which has a 28 gallon tank, will be supplying air through about 75 feet of pipes to a remote tank…perhaps a 20 to 30 gallon tank.

Would there be any negative effects to the motor, air pressure or volume? As for the pipes, should they be larger than half of inch in diameter? Will it make a difference? Current outlet of the compressor accommodates ½" hose, but I can drill a larger outlet and weld a ¾" or larger connector. Thanks.

Jan 26, 2015
'fraid not
by: Doug in

If it were convertible, the motor plate would say something like "Volts: 120 / 240 ".

Only a rewind could convert. You could check with a local motor shop to see if they can/will do.

There's a chance they might be willing to trade yours for a 220V one.

Jan 26, 2015
Label Info
by: Felix O

The label on the motor shows the following information:

Model# MC302800AV
MFG. Code MF03C
HP SPL, (special)
Cont Duty
FLA 15
Frame 56,
Ins Class B
Max Amb 40 deg C
Volts 120
HZ 60
RPM 3450
PH 1
SF 1

Dayton Replacement Z41722721

The shaft is keyed and 0.675" in diameter. Extends 0.8" from face. Shipping weight is 30 pounds.

Does anyone has any ideas if I could convert this motor to 220 Volts?

Jan 26, 2015
Longer hose
by: Bill

Yes, you can change the motor to improve air production, but as Doug says, the recommended way to get compressed air over long distances is to use longer air line, not longer electrical wires.

If you under power your electric motor you will burn it out.

If you under power an air tool with too little air flow, there is no damage to the air tool, just less work done.

That's why industrial plants have air mains - 3, 4" pipe up on the ceiling acting as long air reservoirs, and then drop air lines down to the application.

They don't put a compressor motor and pump near every point of use.


Jan 26, 2015
WL371500AJ 6.25 HP COMP
by: Felix O

Though a much longer hose may work, it'll still be just a temporary solution. I've contacted the manufacture, Campbell Hausefeld to see if it's possible to convert this WL371500AJ 6.25 HP COMP to 220 volts. I have searched the internet but can't find anything.

Jan 25, 2015
by: Doug in

Don't see any specs on that - what's the HP rating?

If there is a cover plate where the wires go in, look under there to see if you can rewire for 120, or ask your vendor if you can exchange it for one that does 220/

A longer hose will not make the compressor cycle more often, but it will take a bit longer to fill up. You can use a small buffer tank near the end to help make up for lost pressure while the air in the hose gets moving if that proves to be a problem.

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Fuse blowing despite new starter and overload circuit

by Timothy Buckley
(New York, USA)

One day while running the compressor, the breaker blew at the fuse panel. 50A.

I reset the fuse switch and tried to plug it back in and was met with the same results, a blow fuse and no start.

I was told by Champion that the single phase starter motors were not great so I replaced it with the updated parts. All new starter and overload circuit.

Still blows the fuse on the box.

Electric motor turns over fine, no seizure or binding that I can tell.

Any ideas?

Tim Buckley

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