Which type of electrical conductor is most commonly used in aircraft wiring?

Copper is the most commonly used electrical conductor in aircraft wiring due to its outstanding electrical conductivity, which is essential for efficient transmission of electrical power. It provides a good balance between conductivity, strength, weight, and cost, making it an ideal choice for the demanding environment of aviation.

Copper's ability to withstand high temperatures and its resistance to corrosion further enhance its suitability in aircraft applications, where durability and reliability are paramount. Additionally, copper is relatively easy to work with, allowing for the production of robust and complex wiring systems relevant to various aircraft systems, including lighting, avionics, and power distribution.

While other materials like aluminum, gold, and silver have their advantages, they do not match copper's combination of attributes for typical aircraft wiring needs.