Electrical wire is a conductor used to carry electric current in various applications, such as homes, buildings, and electronic devices. It is typically made of materials like copper or aluminum, which are good conductors of electricity. The wire is often insulated with plastic or rubber to prevent accidental contact and short circuits. Different types of electrical wire are designed for specific uses, such as Romex for residential wiring or THHN for industrial applications. The wire's gauge, or thickness, determines its capacity to carry current safely. Proper selection and installation of electrical wire are crucial for safety and efficiency in electrical systems.