Construction

1. Nickel-plated copper bus wires (12 AWG)
2. Composite metal alloy/ fiber
3. Heater bus connection (not shown)
4. Fiberglass braid
5. Fluoropolymer dielectric insulation
6. Nickel-plated copper braid
7. Fluoropolymer overjacket

Applications for Thermon HPT Power-Limiting Heating Cable

High performance HPT power-limiting heating cables are designed specifically for process temperature maintenance
or freeze protection where high maintain temperatures or high temperature exposure is required.

A coiled resistor alloy heating element provides the powerlimiting feature of HPT. This PTC (Positive Temperature Coefficient) characteristic decreases the cable's power output as the heat-traced product temperature increases and allows the cable to be overlapped during installation.

The composite construction of the heating element and fiber substrate, plus an additional fiber cushion layer, provide an exceptionally durable high performance heating cable.

HPT cables are approved for use in ordinary (nonclassified) areas, hazardous (classified) areas, and Zone 1 and 2
classified areas.

Certifications/ Approvals

	FM Approvals Ordinary Locations Hazardous (Classified) Locations Class I, Division 2, Groups B, C and D Class II, Division 2, Groups F and G* Class III, Divisions 1 and 2 Class I, Zones 1 and 2, AEx e II
	Underwriters Laboratories Inc. Ordinary Locations Hazardous (Classified) Locations Class I, Division 2, Groups B, C and D Class II, Division 2, Groups E, F and G* Class III, Divisions 1 and 2

• Available Watt densities: 15, 30, 45, 60 W/m at 10°C
• Supply voltage¹: 120/ 240 Vac
• Maximum maintenance temperature:
  HPT  5: 215°C
  HPT 10: 195°C
  HPT 15: 180°C
  HPT 20: 150°C
• Maximum continuous exposure temperature
  Power-off: 260°C
• Minimum installation temperature: -60°C
• Minimum bend radius
  @ -15°C: 10 mm
  @ -60°C: 32 mm
• T-rating²
  Based on stabilized design³: T2 to T6

Notes:

Power Output Curves

The power outputs shown apply to cable installed on insulated metallic pipe (using the procedures outlined in IEEE Standard 515) at the service voltages stated below. For use on other service voltages, contact us.

Product Type 120 Vac Zone Length in (cm) Product Type 240 Vac Zone Length in (cm) Power Output at 10°C, W/m HPT5-1 61 HPT5-2 76 16 HPT10-1 46 HPT10-2 61 33 HPT15-1 46 HPT15-2 61 49 HPT20-1 30 HPT20-2 61 66

Circuit Breaker Sizing and Type¹

Maximum circuit lengths for various circuit breaker amperages are shown below. Breaker sizing should be based on the National Electrical Code, Canadian Electrical Code or any other applicable code. The National Electrical Code and Canadian Electrical Code require ground-fault protection of equipment for each branch circuit supplying electric heating equipment. Check local codes for groundfault protection requirements.