Electrician Training Electrical Certification
wiring recessed light fixtures Electrical Wiring Electrical Troubleshooting and Electric 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
Home Wiring Book 3 Way Switch Dimmer Switches Wiring Outlets GFCI Outlet


How to Wire a 3 Phase Air Compressor


By Dave Rongey - Summary:

How is an air compressor wired and where do the wires go? Wiring a 3 Phase Motor for an Air Compressor, The Basic Requirements for Wiring Electric Motors, 3 Phase Motor Circuits.

Air Compressor Electric Motor

Electrical Question: How is a 3 phase air compressor wired and where do the wires go?

This electrical wiring question came from Cody, in Enid, Oklahoma.

Dave’s Reply:
Thanks for your electrical wiring question Cody.

Wiring a 3 Phase Motor for an Air Compressor

air compressor

The Basic Requirements for Wiring Electric Motors

Electrical Service Panels

Electrical Power for 3 Phase Motors

3 Phase Motor Starters and Control Circuits

motor-relay

More about Wiring Electrical Control Relays

A Summary of Wiring 3 Phase Motors

More about Electrical Circuit Wiring

Basic House Wiring Circuits
home-electrical-circuits

House Wiring Circuits and Circuit Breakers

This article looks at common 120 volt and 240 volt house wiring circuits and the circuit breakers that are installed identifying the types and amperage sizes used in most homes.
Electrical Panel Circuit Listing

electrical-wiring-code

More about Electrical Codes For Home Wiring

Home Electrical Circuit Breakers
2-pole-circuit-breaker

Home Electrical Circuit Breakers

A guide to home electrical circuit breakers and how they work to protect your electrical wiring. When properly installed, your home electrical wiring is protected by a circuit protection device.



Learn How to Wire it Right with my
Complete Guide to Home Electrical Wiring
Perfect for Homeowners, Students,
Handyman, Handywomen, and Electricians
Includes:
Wiring GFCI Outlets
Wiring Home Electrical Circuits
120 Volt and 240 Volt Outlet Circuits
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
Electrical Codes for Home Electrical Wiring
....and much more.

» Click here to learn more about Home Electrical Wiring «
  repair electrical wiring  


MORE ABOUT THIS TOPIC: Electrical Wiring





Click the banner to Ask an Electrical Question:
electrical question


FAQs Frequently Asked Questions and Comments

4 Responses to “How to Wire a 3 Phase Air Compressor”
  1. Dave Rongey says:

    Hi JN,
    Please follow the link in the article which says: More about Wiring Electrical Control Relays. There you will see the wiring diagrams for motor control relays.
    When changing the voltage of the motor be sure to see the wiring diagram on the motor label, and make sure of the circuit voltage which is supplied to the motor matches one of the optional voltage configurations of the motor.
    Dave

  2. J. Noland says:

    I have an air compressor I am currently trying to hook up and my old wiring is in conflict to the way the compressor I am installing was wired. I have changed the motor lead wires from 220 lv to 480 high voltage. The motor is 7 1/2 HP. I have a fused disconnect and motor starter. Please send link, thank you.

  3. Dave Rongey says:

    Hi Michelle,
    When controlling a 3 phase motor it is important to identify the HP size of the motor, which will help to select the type of motor controls. Most motors draw a great deal of amperage when they first start, therefor the motor will need some type of overload protection which is typically provided by a Motor Starter. Typical motor starter applications include a control circuit which then activates the motor starter. A control circuit can be wired to a pressure switch which would activate the motor starter. In this case, the motor starter would have all of the 3 phase wires running through the starter.
    To help you understand this with more detail I have placed additional information to this article which includes links to the motor control section where you will find more information and examples of typical wiring diagrams.
    Thank you for sharing your question about wiring a 3 phase motor,
    Dave

  4. Michelle says:

    We are using a 3 phase 240 volt system and hooking up to an air compressor.
    We used a pressure switch by Square D part number 9013 FHG12MIX.
    The black and blue wires from the 3 phase are connected to the pressure switch and then connected to the motor. The red wire from the 3 phase is only connected to the motor.

    After 3 months the motor burnt out. I was wondering if the Red wire should be connected to the pressure switch and then connected to the motor, like the the black and blue wires?