Self-Regulating Process Temperature

Self-Regulating Process Temperature
  • Self- Regulating, Energy Efficient
  • 16 AWG Buss Wire
  • Circuit Lengths to 750 ft.
  • Process Temperature Maintenance to 230°F (110°C)
  • Maximum Continuous Exposure Temperature, Power Off, 275°F (135°C)
  • Available in 5, 10, and 15 Watts per Foot
  • 120 and 208-277 Volts Available from Stock
  • Industrial Process Maintenance Applications
  • Approximate Size .47 in. W x .20 in. H
  • Min. Bend Radius 1-1/8 in.
  • For use on Metallic Pipes
  • Consult Factory for use on Plastic Piping
  • Factory Mutual (FM) approved for ordinary areas.
  • FM, ATEX and IECEx approved for hazardous (classified) areas when used with U Series and DL accessories.
  • Literature
    SRP Catalog Page
    DL Accessories Catalog Page
    U Series Accessories Catalog Page

Chromalox SRP self-regulating heating cable provides safe, reliable heat tracing for process maintenance applications to 230°F (110°C) or freeze protection of pipes / tank with high heat losses. Constructed of industrial grade 16 AWG buss wire with a tinned copper braid and optional overjacketing, SRP ensures operating integrity most hostile industrial environments..

WARNING — A ground fault protection device is required by NEC to minimize the danger of fire if the heating cable is damaged or improperly installed. A minimum trip level of 30mA is recommended to minimize nuisance tripping.


  • Energy efficient, self-regulating SRP uses less energy when less heat is required.
  • Easy to install, SRP can be cut to any length (up to max circuit length) in the field.
  • SRP features lower installed cost than steam tracing, less maintenance expense and less down time.
  • SRP can be single overlapped without burnout, which simplifies heat tracing of in-line process equipment such as valves, elbows and pumps.
  • Because SRP is self-regulating, over-temperature conditions are minimized.
  • Chromalox U-Series Connection Kits reduce installation time.


Factory Mutual (FM) approved for ordinary areas. FM approved for hazardous (classified) areas when used with U Series and DL accessories

FM Approval:

  • Class I, Division 2, Groups B, C, D (Gases, vapors)
  • Class II, Divisions 1*&2, Groups F, G (Combustible dust)
  • Class III, Division 2 (Easily ignitable fibers and fillings)
  • Class I, Zone 1, AEx e II
  • 3,5,8 and 10 Watt Rated T4 Temperature Class

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  • Freeze Protection
  • Freeze Protection, High Exposure Temperature
  • Process Maintenance, Low Temperature
  • Process Maintenance, High Temperature

Features of SRP Cable

   Max. Maintenance Temp. (°F)    225
   Max. Exposure Temp. (°F) Power Off    275
   Max. W/Ft.    15
   Max. Circuit Length (Ft.)    55-750
   Buss Wire Size    16
   Voltages    120, 208-270
   Hazardous Ratings    Yes
   Usable on Plastic Pipe    No
   Cut-to-Length in Field    Yes
   Field Splicable    Yes
   Can be Overlapped    Yes
   Output Varies with Temp.    Yes
  Varies Output Along Length    Yes
   Accessories    D/UL
   Monitor Wire Available    Yes


SRP Corrosion Selection Guide

   Moisture    C, CT
   Aqueous Solutions of Inorganic Compounds    CT
   Liquids Organic Chemicals Acids or Bases    CT
  Acids or Bases    CT

C - Tin-Plated copper metallic braid for additional protection and ground path
CT - Fluoropolymer corrosion resistant overjacket over braid for hostile/corrosive environments

This is a recommendation guide. Chromalox cannot warrant any Electric Heat Trace against failure by sheath degradation if such failure is the result of operating conditions beyond the control of the heater manufacturer. It is the responsibility of the purchaser to make the ultimate choice of sheath material based on knowledge of the chemical composition of the corrosive solution, character of materials entering the solution, and controls which maintains the process.

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Part # Description  
387188 SRP 5-1CT 120V 5W/FT Buy Now
387225 SRP 5-2CT 240V 5W/FT Buy Now
387129 SRP 10-1CT 120V 10W/FT Buy Now
387196 SRP 10-2CT 240V 10W/FT Buy Now
387073 SRP 15-1CT 120V 15W/FT Buy Now
387137 SRP 15-2CT 240V 15W/FT Buy Now
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