Single Conductor Cables (Hook-Up Wire)Single conductor cables, also known as hook-up wire, are cables that consist of a single conductor wire. These cables are typically used for low voltage and low current applications, such as for internal wiring in electronic equipment, in control panels, and for connecting components to printed circuit boards. Single conductor cables are available in a variety of materials, including copper, aluminum, and various alloys, and they can be coated with insulating materials such as PVC, rubber, or Teflon to protect the conductor from damage and to prevent short circuits.