Electrician Training Electrical Certification wiring recessed light fixtures Electrical Wiring Electrical Troubleshooting and Electrical Repairs wire outdoor light fixture Home Electrical Wiring Diagrams
wiring home generator and transfer switch wiring a 220 volt range cord outlet Wiring for GFCI Outlets Wiring Outlets and a Switched Outlet Wiring and Installing Ceiling Fans and Remote Controls wire dimmer switch wiring diagrams for switches wiring a dryer cord and 220 outlet circuit breaker panel
Electrical Wire and Cable

220 Volt Electrical Circuit for an Air Compressor

I read that 20 amp 240v outlets do not have a natural wire both are hot. Is this true and do I need a double pole 20 Amp 240v breaker for the 10-2 wire?

220 Volt Electrical Circuit for an Air Compressor
Background: Dan, a Homeowner from Avondale, PA
Question: I have a Jun Air 12-20 compressor rated 198-242V – 2.85 amps. There are two motors on this compressor. The plug is a 1 1/8 inch diameter 20 amp 240V style.

I ran 10-2 for wire and I want to put in a breaker just for this compressor.

My question is I read that 20 amp 240v outlets do not have a natural wire both are hot. Is this true and do I need a double pole 20 Amp 240v breaker for the 10-2 wire?

Additional Comments: nice!

Dave’s Reply:
Thanks for your electrical question Dan. There is no neutral wire required for 240 volt air compressor motors. The circuit breaker will need to be 2-pole 240 volt sized according to the specifications of the manufacturer.

The Following links will assist you with your electrical question:

220 Volt Wiring Diagram

Circuit Breakers
House Wiring Circuits and Circuit Breakers

This link is helpful as a Homeowner
Do-It-Yourself Electrical

» You Can Avoid Costly Mistakes! «

Here's How to Do It:
Wire It Right with the help of my Illustrated Wiring Book

Great for any Home Wiring Project.

Get the Printed edition of Home Electrical Wiring

Get the eBook edition of Home Electrical Wiring
[instant download]

  electrical wiring  

Complete Guide to Home Electrical Wiring

Perfect for Homeowners, Students,
Handyman, Handywomen, and Electricians
Wiring GFCI Outlets
Wiring Home Electric Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring Light Switches
Wiring 3-Wire and 4-Wire Electric Range
Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet
How to Troubleshoot and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
NEC Codes for Home Electrical Wiring
....and much more.

Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.

Electrical Tip

The Safest Way to Test Electrical Devices and Identify Electric Wiring!

The Non-Contact Electrical Tester
This is a testing tool that I have had in my personal electrical tool pouch for years, and is the first test tool I grab to help identify electrical wiring. It is a Non-contact tester, [amazon.com], I use for the detection of Standard Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use.

« Installing an Inline Exhaust Fan Electrical Requirements for a Journeyman in Pennsylvania »


If you are asking a Quick Question please make sure it is about This TOPIC:
“220 Volt Electrical Circuit for an Air Compressor”

Comments Posted here are Open for Quality Discussion and Participation.

By submitting you agree to our Site Terms