Thermon Heat Tracers Pvt. Ltd. Offers Parallel Constant Watt Heating Cable. Thermon Heat Tracers Pvt. Ltd is an ISO 9001 accredited company. The Company also manufactures various types of wires and cables. The Parallel Constant Watt Heating Cable, also known as FP, is designed to provide freeze protection or process temperature maintenance to piping, tanks and equipment. The Parallel Constant Watt Heating Cable provides consistent and reliable heat outputs regardless of circuit length. This Cable has Operating Voltage of 230 VAC and Maximum Maintenance Temperature of 65 Degree C.