Self-Regulating Freeze Protection Cable

Self-Regulating Freeze Protection Cable
  • Self-Regulating, Energy Efficient
  • Max. Exposure Temp. 185°F (Power Off)
  • Cost Effective for Commercial Freeze Protection Applications
  • Freeze Protection of Fire Suppression System Mains and Branches
  • Grease Waste Flow Maintenance
  • TPR or TPE Overjackets
  • Circuit Lengths, Up to 660 Ft.
  • 3, 5, 8, and 10 W/Ft.
  • 120, 208 - 277 Volt From Stock
  • Approximate Size .47 in. W x .20 in. H
  • Minimum Bend Radius 1-1/8 in.
  • For Use on Metal and Plastic Pipes
  • Literature
    SRF Catalog Page

Chromalox SRF cable is ideal for keeping metal and plastic pipes warm in commercial construction and institutional buildings, some industrial freeze protection applications. SRF cable is constructed of a self-regulating polymer core that varies its output along its entire length, saving energy and eliminating hot spots along the pipe. Parallel construction makes it easier to install than zone or series types of cable since it can be cut-to-length at any point on the pipe.

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 SRF uses less energy when less heat is required.
  • Easy to install, SRF can be cut to any length (up to max. circuit length) in the field.
  • Field splices can be performed easily in minutes with no scrap or wasted cold sections.
  • SRF can be overlapped without burnout, which simplifies heat tracing of in-line process equipment such as valves, elbows and pumps.
  • Because SRF is self-regulating, over-temperature conditions are minimized.
  • Chromalox termination, splice, tee and end seal kits reduce installation time.

For more features refer to catalog page PDF to the right.


  • UL Listed for ordinary areas and fire protection system piping
  • CSA Certified for ordinary areas, fire suppression system piping and grease waste flow maintenance.

  • Freeze Protection

Features of SRF Cable

  Max. Maintenance Temp. (°F)   100
  Max. Exposure Temp. (°F) Power Off   185
  Max. W/Ft.   8
  Max. Circuit Length (Ft.)   180 - 660
  Buss Wire Size   16
  Voltages   120, 208-277
  Hazardous Ratings   No
  Usable on Plastic Pipe   Yes
  Cut-to-Length in Field   Yes
  Field Splicable   Yes
  Can be Overlapped   Yes
  Output Varies with Temp.   Yes
 Varies Output Along Length   Yes
  Accessories   DL/EL/U
  Monitor Wire Available   No

SRF Corrosion Selection Guide

  Moisture   C, CR
  Aqueous Solutions of Inorganic Compounds   No
  Liquids Organic Chemicals Acids or Bases   No
 Acids or Bases   No

C - Tin-Plated copper metallic braid for additional protection and ground path
CT - Fluoropolymer corrosion resistant overjacket over braid for hostile/corrosive environments
CR- TPR overjacket over braid for protection against certain inorganic chemical solutions

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  
386100 SRF-3-1CR 3W/FT 120V Request a Quote
386118 SRF-3-2CR 3W/FT 240V Request a Quote
386142 SRF-5-1CR 5W/FT 120V Request a Quote
386150 SRF-5-2CR 5W/FT 240V Request a Quote
386062 SRF-8-1CR 8W/FT 120V Request a Quote
386070 SRF-8-2CR 8W/FT 240V Request a Quote
386388 SRF-10-1CR 10W/FT 120V Request a Quote
386396 SRF-10-2CR 10W/FT 240V Request a Quote
386409 SRF-10-1CT 10W/FT 120V Request a Quote
386417 SRF-10-2CT 10W/FT 240V Request a Quote
387428 SRF-3-1CT 3W/FT 120V Request a Quote
387436 SRF-3-2CT 3W/FT 240V Request a Quote
387444 SRF-5-1CR 5W/FT 120V Request a Quote
387452 SRF-5-2CT 5W/FT 240V Request a Quote
387460 SRF-8-1CT 8W/FT 120V Request a Quote
387479 SRF-8-2CT 8W/FT 240V Request a Quote
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