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Electrical Wire and Cable

Using Copper and Aluminum Wire for Home Circuits

When splicing aluminum and copper wires do the wire connectors need to be a special type? Wiring Methods for Copper and Aluminum Wires, Safe uses of Aluminum Wire for Larger Home Electrical Circuits.

Home Electrical Wiring Video

Hooking Up a Generator to the House Panel
Using a Circuit Breaker Interlock Kit
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Copper and Aluminum Wiring
Electrical Question: When splicing aluminum and copper wires do the wire connectors need to be a special type?
I am replacing a ceiling light fixture and I have questions about some aluminum wire I am working with.

CU/AL Splice Connectors for Copper and Aluminum Wire

  1. Do one or the other or both connectors need to be special CU/AL connectors such as Ideal Twister? For instance, can the neutral group remain within a standard connector?
  2. If standard connectors are OK, can I still use the current large black connector to twist the light’s neutral aluminum strands with the other four neutral coppers?

Thanks for any assistance you can give.

This electrical question came from: Joe, a Homeowner from Woodridge, Illinois.
Dave’s Reply: Thanks for your electrical question Joe.

Wiring Methods for Copper and Aluminum Wires

Application: Splicing Electrical Wires.
Skill Level: Intermediate to Advanced – Best performed by a Licensed Electrician.
Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester.
Estimated Time: Depends on the personal level experience and ability to work with tools and access to the wiring.
Precaution: Identify the circuit, turn it OFF and then Tag it with a Note before performing any wiring.
Notice: Installing additional electrical wiring should be done according to local and national electrical codes with a permit and inspected.
Materials: Properly sized wire connectors, anti-corrosion ointment, electrical tape, junction box and blank cover.

Working with Copper and Aluminum Electrical Wiring

Installing Aluminum Wiring for Home Electrical Circuits

Safe uses of Aluminum Wire for Larger Home Electrical Circuits and the Advantages of Copper Wire for Home Electrical Circuits.

More about Splicing Electrical Wires

Guide to Home 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.

Splicing Electrical Wires

Electrical Junction Box Splice

Electrical junction box splices can be made safely when you understand the method. This example will show you how its done step by step and shows how to make a junction box splice and the related electrical codes.

The following may also be helpful for you:

Dave's Guide to Home Electrical Wiring:

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Wire It Right with the help of my Illustrated Wiring Book
Great for any Home Wiring Project.
  electrical wiring  

Complete Guide to Home Electrical Wiring

Perfect for Homeowners, Students,
Handyman, Handy Women, 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
Troubleshoot and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
NEC Codes for Home Electrical Wiring
....and much more.

Learn more about Home Electrical Wiring
with my Online Video Course:
Basic Home Electrical Wiring by Example

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.

More articles about Aluminum Wiring, Electric Wiring, Electrical Wire Splice and Home Electrical Wiring:
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FAQs Frequently Asked Questions and Comments

4 Responses to “Using Copper and Aluminum Wire for Home Circuits”
  1. Kiri says:

    We are remodeling our kitchen in Rochester, NY. We are replacing an electric cook top with an Induction cook top, also replacing a wall oven. The present wiring from the breaker panel is heavy gauge aluminum. Do we have to replace the aluminum wire with copper?. what is the code in effect.
    Thanks, Kiri

  2. Dave Rongey says:

    Hi Kiri,
    The electrical code states that either aluminum or copper wire conductors may be installed for cook tops. The size of the wire and amperage must be adequate for the specific cook top you have.
    That being said, there are manufacturers of equipment who specifically require a copper wired circuit, however I have only seen this on motor type equipment such as air conditioners, well pumps etc..
    I would consult the manufacturer directly to make sure as to not void the warranty and make sure the cook top will perform correctly.

  3. Robert says:

    Dave, I reading this response to CU and AL where code accepted I note that you did not mention the use of Noalux when wiring AL to CU?

  4. Dave Rongey says:

    Hi Robert,
    You are correct, however I did mention that CU and AL wire splices should be done with the use of non-corrosive compounds, and of course there are a few approved brands available including the one you have mentioned.
    I always appreciate a fellow Sparky adding their comments – Thanks!