Aluminum wire

Aluminum wiring is a type of wiring used in houses, power grids, and airplanes. Aluminum provides a better conductivity to weight ratio than copper, and therefore is used in power wiring of some aircraft.

Utility companies have used aluminum wire for electrical transmission in power grids since the early 1900s. It has cost and weight advantages over copper wires. Aluminum wire in transmission and distribution applications is still the preferred material today.