Is aluminum wiring legal in residential homes in the US?

Aluminum wiring is legal in residential homes today, but it comes with important caveats.

Current code: Modern aluminum wiring (installed to current electrical codes) is permitted and safe when properly installed. However, most electricians today use copper wiring instead because it's more reliable and easier to work with.

The real concern: If your home was built in the 1960s–1970s, it may have older aluminum branch wiring (for outlets and switches). This older aluminum can be problematic because it oxidizes over time, creating loose connections that generate heat and pose fire risks. This is why some insurance companies and home inspectors flag older aluminum wiring as a concern.

What to do: If you have aluminum wiring, get a licensed electrician to inspect it. They can assess its condition and recommend repairs if needed. Common solutions include replacing sections with copper, using special connectors, or having a full rewire. Many homeowners with older aluminum wiring live safely with it—the key is proper maintenance and inspection.

If you're shopping for a home with aluminum wiring, it's worth having an electrician evaluate it before buying. Need help finding a local electrician to inspect your wiring? Search electrician.city to connect with qualified contractors in your area.