Chromalox HPL High-Temperature Power Limiting Heating Cable is a proven. reliable solution for industrial precess temperature maintenance and freeze protection. HPL features a parallel heating core that produces powerlimiting thermal output over its entire length. Using a single power point, you can wasily configure and install a heat tracing system as short as several feet os as long as 780 feet right in the field. System design only requires that you match the HPL cable thermal output to the heat loss of your piping system. and maintain temperature, and has zero inrush at start-up. With 500°F (260°C)