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

Understanding Air Conditioning Circuit Requirements

Electrical Troubleshooting tips for an Air Conditioner: I need a 2 pole 20 amp breaker for my panel box, It is for the wire to my air conditioning unit. The specs are rated voltage…

The Air Conditioner Specifications Tell It All
Electrical Question: I need a 2 pole 20 amp breaker for my panel box. It is for the wire to my air conditioning unit. The specs are rated voltage 208/230 phase 1 hertz 60 voltage min 197 max 253. Minimum circuit ampacity 18.9.max. Fuse or circuit breaker 30 amps. I was told that on the 12/2 wire I need a 20 amp breaker, but in looking at different 20 amp breakers I see also other nos. as q22o etc. Can you please tell me what is the proper breaker for me to use. Thank you.

This electrical question came from: Kevin, a Homeowner from Canada

Dave’s Reply:
Thanks for your electrical repair question Kevin.

The Following  will assist you with your Electrical Troubleshooting Question:

Electric panel
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 Circuits
home-electrical-circuits
Electric Circuit Listing
The size of the home electrical service panel is designed by calculating the square footage of the home and factoring in the code requirements for the electrical circuits that are required.

Home Circuit Breaker
2-pole-circuit-breaker
Electrical Wiring Protection using 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.

Home Electrical Wire
electrical-wire
Electrical Wire for the Home
Complete listing of electrical wire types and parts used for home projects with electrical code information serves as selection guidelines.


« Are Computers Safe When Plugged into Home Electrical Outlets Installing Outlets Near Air Conditioning Ducts »

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  

Not the answer you're looking for?
Browse other questions in the following categories:

220 Volt Wiring
Air Compressor
Electrical Troubleshooting

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

See more about Electrical Wiring in Your Local Area

FAQs Frequently Asked Questions and Comments

2 Responses to “Understanding Air Conditioning Circuit Requirements”
  1. don says:

    What size wire and breaker do I run use for a Fridgare 18000 btu window unit 230 volts 12 amp?

    • Dave Rongey says:

      Hi Don,
      The specifications for your 18000BTU AC unit is helpful, however the size of the circuit for this particular AC unit would be indicated by the size of the male plug-in on the end of the cord. The plug will also show how many wires are required for the circuit, for example 4 prongs would indicate a 3-wire circuit with a ground wire. The circuit specifications of the AC cord should be visible in the molding of the face of the plug. Note also the configuration of the plug prongs which will indicate the receptacle outlet counterpart that is required.
      If the plug indicates that it is rated for 20 amps then a dedicated 20 amp circuit will be required consisting of #12 copper wire and a 2-pole 20 amp circuit breaker.
      I hope this helps,
      Dave

COMMENTS and QUICK QUESTIONS:

If you are asking a Quick Question please make sure it is about This TOPIC:
“Understanding Air Conditioning Circuit Requirements”

Comments Posted here are Open for Quality Discussion and Participation.
PLEASE NOTE: WE DO NOT PUBLISH 3RD PARTY SPAM COMMENTS, TRACK-BACKS OR LINKS.



By submitting you agree to our Site Terms