Used in maintaining fluid viscosities in process Piping, in Pumps, Tanks and Vessels. They provide freeze protection for foundations, drains, freezer floors and air conditioning lines. In other applications, heater cables furnish frost protection and de-icing functions on power rails for mass transit and people mover systems. Electrical Heat Trace Cables are developed by Specialty Cable engineers to meet the specific voltage, wattage, temperature and zone length requirements. Heat Tracer cables are constant wattage type and self regulating self-limiting type.