An electrical conductor is any metal that allows electrical current to pass through it. Metals such as copper, aluminum, and their alloys are commonly used as electrical conductors. When a potential difference is introduced across the atoms in an electrical conductor, the electrical charges transfer from one to the other. Electrical conductors are used in the form of wires. Various parameters such as tensile strength, fatigue strength, corona loss, local conditions, and cost can all be considered when choosing a conductor.