Deciding which is better between copper and aluminum wiring depends on what you are trying to accomplish: using strong material or saving money.
Hazards with aluminum wiring, HomesMSP
Copper vs Aluminum wiring for Charge Station Pro, Page 2
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Aluminum Wiring vs. Copper: Which Is Better?
Copper vs. Aluminum Wiring: Which Is Better?
Big 3 Explore Aluminum Wiring Pros and Cons, 2012-05-25, Assembly Magazine
THE ALUMINUM WIRING DILEMMA — RSB Electrical Inc.