The metal used in most electrical wiring is copper. This material is favored because of its excellent electrical conductivity, allowing for efficient transmission of electricity with minimal resistance. Copper is also relatively malleable, making it easy to shape into wires and other components. Additionally, it is resistant to corrosion, which increases the durability and longevity of electrical systems. While aluminum is sometimes used as an alternative due to its lower cost and lighter weight, copper remains the preferred choice for most residential and commercial electrical applications due to its superior performance and reliability.