HSX Self-Regulating Heating Cable

SX heating cables, the heart of Thermon’s WarmTraceTM system, are specifically designed to maintain hot water supply piping at desired nominal maintenance temperatures. With 14 AWG bus wires (larger than any other system available), HSX can reduce the number of circuits required to install an electric heat-traced system. A WarmTrace system replaces the complex recirculation network of return pipes, circulating pumps and balancing valves. For each hot water supply line, simply match the hot water maintenance temperature with the corresponding color-coded cable and insulate per the design guide. HSX self-regulating cable automatically maintains desired water temperatures. Changes in pipe diameters, flow rates and use patterns will not affect the design. Even variations in ambient or water temperature are compensated for as the cable adjusts its heat output along the entire length of a heat-traced pipe.


  • Because a WarmTrace system replaces recirculation, it also eliminates the costs of continuously operating pumps, deliberately overheating the water and maintaining the recirculation system. Potential water savings can also be realized since the heat tracing can be installed up to the point of use; i.e., no waiting for hot water.


Catalog # Nominal Maint
HSX 2105 41°C (105°F)
HSX 2120 49°C (120°F)
HSX 2140 60°C (140°F)
Minimum Bend Radius 0.38" @ 5°F
1.25" @ -60°F
Ground-Fault Protection 30 mA
Supply Voltage 208 Vac