Home / Preparing for your project / Non-Jacketed Self-Regulating Cable What is the power supply for the non-jacketed cable? Non-Jacketed Self-Regulating Cable All HTM cable should be power by 120V supply lines. Underfloor Heating Thermostats Heated Floors Further Questions? Preparing for your project Can I use the non-jacketed self-regulating cable outdoors? What is the heat output of the non-jacketed cable? Can I use non-jacketed cable on my roof? What is the power supply for the non-jacketed cable? What is the non-jacketed cable best for? How is the non-jacketed cable applied to a pipe? What are the maximum circuits for Warmup non-jacketed cable?