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How to Electrical for an Air Conditioner

Why Most Air Conditioning Units Should Not Be Plugged Into a Shared Circuit

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Guide to Residential Electrical Wiring guide to electrical wiring

Installing an Air Conditioning Circuit
Electrical Question: I live in an older apartment building, would guess from the 40s. We have 2 screw in circuits – a 20amp and a 30amp. The 20amp is dedicated to the kitchen, and the 30amp is for the rest of the apartment. The only major item that would be plugged into the 30amp is a large plasma unit that takes about 5.5amps. The rest would be room lights, some fans, computer, etc. Its starting to get hot out and unfortunately our apartment is pretty bad with heat retention. I have an 8000 BTU AC set up, but its not cutting it (went through all different setups with it). I want to try a 10K AC unit. However these units get up to about 9amps. I had read that anything over 7.5amps should get its own circuit. Its not an option to install any more circuits. But shouldn’t the 30amp be able to handle the load?

Thanks
John

This electrical question came from: John, from Caldwell, New Jersey.

See more about Home Wiring for New Jersey

Dave’s Reply:
Thanks for your electrical question John

IMPORTANT

 

Circuit Requirements for Air Conditioners

Most Air Conditioning Units Should Not Be Plugged Into a Shared Circuit

RESOURCES

Home Electrical Circuits
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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.

Electrical Wiring Codes
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Electrical Code Directory covering electrical circuits.


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Great for any Home Wiring Project.


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Complete Guide to Home Electrical Wiring

Perfect for Homeowners, Students,
Handyman, Handywomen, and Electricians
Includes:
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 Tips to Help You Wire it Right

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

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 that I use to easily Detect 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.

The Quickest Way to Check for Faulty Electrical Wiring!

The Plug-In Outlet Tester
This is the first tool I grab to troubleshoot a problem with outlet circuit wiring. This popular tester is also used by most inspectors to test for power and check the polarity of circuit wiring.
It detects probable improper wiring conditions in standard 110-125 VAC outlets Provides 6 probable wiring conditions that are quick and easy to read for ultimate efficiency Lights indicate if wiring is correct and indicator light chart is included Tests standard 3-wire outlets UL Listed Light indicates if wiring is incorrect Very handy and easy to use.

Strip Off Wire Insulation without Nicking and Damaging the Electric Wire!

The Wire Stripper and Wire Cutter
My absolute favorite wire stripping tool that I have had in my personal electrical tool pouch for years, and this is the tool I use to safely strip electrical wires.
This handy tool has multiple uses:
The wire gauges are shown on the side of the tool so you know which slot to use for stripping insulation.
The end of the tool can be used to grip and bend wire which is handy for attaching wire onto the screw terminals of switches and outlets..

The wire stripper will work on both solid and stranded wire. This tool is Very Handy and Easy to Use.

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