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Re: New air compressor motor to 220 vlt?
If you have a 220 v service 1 phase meanig there is 220 volts across your existing two power feeds and your motor only has 3 wires there is usually a low voltage and high voltage schematic on the motor if you are wired as per this then your green is standard ground and black and white are your hot wire or line voltage let me know if you have any other questions
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Well, got to local hardware store, pick up 12/3 soow/soo wire, new plug, LOTS of electrical tape (lol one rollwould work 3M type 88 is best), 3 12ga wire nuts. splice in the wire( white-white, black-black, green-green) near the motor. Cover the spliced area with enough tape to well cover the splice area; more than just one layer of tape (do not be afraid to pull on tape; it holds better when tape is pulled and stretched). Connect the plug; white to silver, black to gold/brass, green to grounding lug/green. place a slight loop (4-6" dia) with spiced area opposite of where cable passes its self. either tape and/or zip-tie so no strain is placed on the splice. At this point compressor should be working.
You can\'t run it on 220, but if you take only one of the 220 black wires and attach it to the black on the compressor you are feeding it 110. The problem will be that you have no neutral wire so you\'d have to use the ground of the 220 lead (green) as the neutral on the compressor (white). It\'ll run fine but it\'s not the right way and it can be a hazard. The white wire is neutral which is basically a ground wire from the electric company, the green is the ground wire in your building and it\'s there for safety so using it to power things is dangerous and probably illegal. I\'ve done it in a pinch, but wouldn\'t do it if at all avoidable. You may be able to get a transformer but you\'re probably better off running a 110 circuit or getting a 220 compressor.
If the motor is 230 v then it should have three wires, black, red, and green, however if the motor is convertible from 120 to 230v then the wire from the motor may be black, white, and green. Check the motors label to see if it has different wiring configurations. If the motor is 230 v only then the white wire would be the other side of the 230 v circuit, and the pressure switch should break both sides. Neutral is not used. Note that some people would use a single pole pressure switch, although this will work it is not recommended.
Look for reset button, hopefully reset would have tripped. If compressor will not power on, remove cover to pressure switch and examine contacts for burned. If burned, temp. connect 110v to motor side of switch, (black- black and white-white) if motor runs ok replace switch. If motor does not run check capacitor for proper valve, replace as needed. If cap tests ok and motor will not run check motor windings for melted white strings that bind wiring. If windings look burned most likely you will need to find used motor from repair center.
First are you sure your compressor is wired for 220. If so \,use the white and black for the hots connected to the black and red in your recptacle. Connect the green to green or bare conductor. The compressor most likely has no 120V devices on it so the neutral is not requied.
This is simple it is a 220 volt machine so you would need 2 hot wires one red and one black each one is 110 volts now you have a green wire that in the grown wire and then the white wire with is the neutral wire. So black to black, red to red, green to green and white to white./
Ok, read the data plate on the motor. Does it have a zero with a line straight through it. That means it's single phase. Also the plate may list two different voltages 110/220ac correct. On the inside of the panel of the box where the cord connects it will have a two diagrams. One marked low voltage, the other high voltage. You want 220ac so follow the high voltage diagram. Since it's single phase the green wire will go to a green screw in the box. The black wire from your cord is positive and the white negitive (actually neutral but shown on diagrams as negitive). The wire coming out of the motor will have numbers on it's casing. Follow the connection points on the diagram. Don't worry if you hook them backwards the motor just won't turn. It won't hurt anything.
Assuming that you are wiring for 115v. Lets start with the ground. The cord that attaches to the wall outlet will have three wires, green, black , and white. Insert the cord thru one of the openings of the pressure switch and attach the green wire to the ground screw. Next look very closely at the contacts and notice that they are arrainged in pairs. There is a small brass bar with two contacts that completes the circuit for each line. Start with L1 and attach white wire from cord, then attach white wire from motor to the screw terminal that small brass bar bridges to (should be T1). Next attach black wire from cord to L2 and black wire from motor to remining screw. Remember that the small brass bar with two contacts is the bridge and simply connects white to white and black to black. Enjoy