EasyHeat Freeze Free heating cables featuring a special self-regulating core that adjusts according to the surrounding temperatures to ensure the right amount of heat when and where it is needed. Since this cable regulates its own heat output, it reduces power consumption, and a thermostat may not be necessary for some freeze protection applications. It also means that the cable can be safely overlapped when installed on plumbing pipes, valves or flanges. Operating on 120 Volts AC, Freeze Free cables are suitable for use on plastic and metal water pipes up to 2-inches in diameter. A rugged metal braided jacket provides an electrical ground as well as protection against damage***NOTE-Not designed to be submerged in water or get wet***