See More about Electric Wiring for a 220 Volt Air Compressor I have found for example, that a 20 Amp 220Volt Double-Pole Switch works very well as an On / Off switch for Air Compressors as described in this electrical project. Part Reference: Air Compressor Switch: 220Volt 20Amp 2-Pole As with any electrical circuit, when installed properly, the ground wire is the most important wire of the circuit because it will help protect the equipment and the user in the event of a short circuit or electrical fault.The ground wire for the air compressor will attach to the separate ground terminal strip that is bonded to the electrical system ground.With new control circuits coming out for just about everything, this could change.Such is not true for 220/240 volt air compressors yet.Newer 240 volt circuits for kitchen equipment such as ranges and laundry room dryers do require a separate insulated neutral wire and a separate ground wire because these new units have 120 volt control circuits.There is no need for a neutral wire with this type of 220 Volt equipment.The Neutral Wire and 220/240 volt Equipment Circuit The fact is that with a standard 240 volt motor for equipment such as an air compressor there are only two insulated wires for the 220/240 volts and one separate wire for the ground. A dedicated circuit will ensure ample power for the unit and prevent tripping a circuit that is shared with other equipment or tools.īrad, I understand your thinking, and a lot of people get confused by this. A dedicated circuit will be required for most larger air compressors. The air compressor users manual will specify the required power source. The circuit size will depend on the size of the air compressor and the horsepower rating of the motor. Circuit Wiring for a 240 Volt Air Compressor Precaution: Identify the air compressor circuit, turn it OFF and Tag it with a Note before working with the 220 volt air compressor wiring. Tools Required: Basic Electricians Pouch Hand Tools and a Voltage Tester.Įstimated Time: Depends on personal level experience, ability to work with tools and the available access to the air compressor circuit and electrical connection box. This electrical wiring project is best performed by a Licensed Electrical Contractor or Certified Electrician. How to Wire a 220 Volt Air CompressorĪpplication: Electric Circuit for a 220 Volt Air Compressor with Three Wires. This electrical wiring question came from: Brad, a Handyman from Endicott, New York.ĭave’s Reply: Thanks for your electrical wiring question Brad. I thought if something bad happened the neutral would be the safer bet, but I’m getting mixed answers from other sources. Do I connect the white neutral to the neutral bar, or to the ground bar in the sub panel?.I have a 220 volt air compressor that only has three wires.I’m rewiring the dryer from the 3 wire to 4 wire, that’s easy. I’m pretty confident according to your wiring diagram that part is fine.I added a sub panel to my main fuse box.Understanding Ground Wires for 220/240 Volt CircuitsĮlectrical Question: Where should I connect the white neutral wire in the sub panel for my 220 volt air compressor?
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