RDC series connection constant wattage heating cable use the core conductor as the heating element, when the core conductor connect to power supply, the core conductor will send out joule heat, same as they are of the entire cable length, the heating value of each unit is the same.
FSR self-regulating heating cable is constructed of a semi-conductive heater matrix extruded between parallel bus wires, a self-regulating cable adjusts its output to independently respond to ambient temperatures all along its length.
