Electrical Wiring in the Home/copper vs aluminum

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Expert: Rick Miell - 6/24/2006


Question
What is the difference or reasons between using copper vs aluminum wire? I am wanting to run an 220 volt extension in 2inch conduit from my house to my barn aprox 200ft away.  Aluminum is about 1/3 the cost.  Can I use it?  Thanks Curt Davidson

Answer
Hi Curt.

Cost is the main reason for using one over the other.  Both are allowed by code, and work well, if the ends of the wire are treated correctly.  You need to make sure that where you land the wires are approved for aluminum, if using aluminum.  Most terminals and lugs are approved for both copper and aluminum, nowdays.


I hope this has helped.

Rick Miell
About Electrical Wiring in the Home
This site answers questions related to home electrical wiring, home wiring, general electrical help,and other electrical questions related to aleternating current (AC). You can find help on the National Electical Code, home electrical issues, wiring electrical outlets, installing lighting, electrical grounding, and general electrical help for do-it-yourself projects not require an electrician. If you do not see your home electrical wiring question answered in this area then please ask your electrical wiring question here

Electrical Wiring in the Home

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Rick Miell

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Past County electrical inspector, hold St. of Colorado Master license, will try to answer any electrical question with Code related answers.

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State of Colorado Master Electrician. Past County Electricial Inspector (15 years)

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