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How do I change my SO compressor to 220V

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aaron h

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Dec 13, 2012
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read an ehow article telling to run 220 wire directly to motor is that how i do it?
 

Zeke

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No! There are 4 poles in the motor if memory serves me. You will be changing the wiring to 1 2 3 & 4. There's a discussion somewhere in the Lighting and Electrical forum with a chart if you want to look for it.
 

mtwaterguy

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Looks like you need the manual. Site says a switch changes between 120V/220V.
 
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aaron h

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yes a switch does change it but its gotta be hooked to 220 before that matters. current plug is a standard 110. going to lighting and electrical to do a better search
 

Zeke

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The wiring diagram for most 120/240v motors is on the inside of the cover on the motor. The motor has two windings, each one operating at 120v. Connecting 2&3 together puts the windings in series, which means that if you apply 240 volts each winding gets 120v. When you connect 1&3 and 2&4 together the windings are in parallel, and they are 120v together using a neutral as a return path, if that makes any sense.

attachment.php
 
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aaron h

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that forum made my head hurt. i seen the thread where that diagram came from and others, guess i should have posted in the lighting and electrical section, but i didnt know cuz electricity scares the **** out of me so i never looked in that forum.

thanks zeke it did not make sense to me and I will be referring this to my father the electrician and make him do it.
 

CJKaz

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As Trey T said. Check the motor. Specifically in the junction box where the wiring connections are made. Affection ally known as the pecker head, there should be a diagram inside the cover.
 

evintho

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Is that compressor enough to suit your needs? As you probably know, it's all about the CFM. 7 @ 125psi ain't very much! Maybe, sell the SO and get something with a 60-80 gallon tank, minimum 5 hp with as much CFM as possible and a true 220v unit. Run a dedicated 220v line. I have an I/R 5hp, 80gal that puts out 18 CFM and it runs all my air tools, sandblaster, etc and I never have to wait for it to catch up. With compressors bigger is almost always better! Just my .02 cents.
 
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aaron h

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ok thanks. i looked and bam there it was
IMG_2076_zps8f0b3272.jpg


still not effin with it, imma have my dad wire me in another 220 outlet and change the plug
 

ephotrod

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I don't think the effort to change from 120v to 220v is worth it. As mention earlier its better to sell the compressor and get a higher volume unit (there are alot of good brands out there) with a bigger tank. Look at champion, ingersol-rand, quincy and there are several other good brands that are fair priced.
Josh
My two cents worth half.
 
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aaron h

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appreciate it josh but it is worth it cuz my 15amp breaker that the compressor is on now is at full load without compressor. I plan on getting a bigger tank one day and it will be 220, but this compressor i got in a trade so i have nothing in it and it beats the hell out of no compressor at all. so it wont hurt to wire another outlet up now and while im at it just change the plug on mine so get the load off my 110 15 amp breaker. I have subpanel in garage off 50amp in house plus my 220 is coming off a separate breaker in house with separate wire my dad ran for me. I know 7cfm isnt alot i'll eventually flip this compressor but for now i need to address my dimming lights while compressor runs and not bein able to use any power tools while it runs
 

W-Cummins

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appreciate it josh but it is worth it cuz my 15amp breaker that the compressor is on now is at full load without compressor. s

That compressor should not run on a 15 amp 120V outlet at all! It's rated for a 30 amps at 120V and although it's not a 5hp motor it looks like it's about 4hp. So if it has the Correct 30amp plug on it, it will not plug into the wall.... BTW that chart you posted seems to be the pressure switch chart not the motor wiring one.....

William.....
 

sberry

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It should be on a 20A circuit, if its problematic could be moved to a dedicated 30 but its not worth converting if it works. Running a new wire or circuit is ok but would look at 120V.
 
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