The answer to 'aluminum wiring vs copper wiring' is that aluminum wiring is generally less expensive than copper wiring, but it also has some drawbacks. Aluminum wiring is more prone to oxidation and expansion/contraction, which can lead to loose connections and potential fire hazards over time. Copper wiring is more durable, reliable, and safer, but it is also more expensive. For most residential applications, copper wiring is the recommended choice for new construction and major electrical upgrades.
Aluminum wiring was commonly used in homes built in the 1960s and 1970s due to the lower cost, but many insurance companies now require it to be replaced with copper wiring. Homeowners with aluminum wiring should have it inspected regularly by a licensed electrician and consider upgrading to copper wiring, especially if they are planning any major home renovations.