Chromalox SRP Self-Regulating Trace Heating Cable (Process Temperature – 230°F 110°C)

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Chromalox SRP Trace Heating Cable


Frost Protection Trace Heating Cables

Trace Heating cable

frost protection

Chromalox SRP self-regulating trace heating cables provide process temperature maintenance and frost protection to pipework, instrument lines, tanks and drums.

With UL Listing and CSA, ATEX, IECEx and FM certification Chromalox SRP heat trace cables are suitable for use in hazardous areas.

Heating Cable Features

  • Energy efficient SRP self regulating trace heating cables requires less energy as less heat is required
  • Simple to install heat trace cable and can be cut to any length (see max circuit length)
  • SRP trace heating cables offer low installation costs and require less maintenance minimising downtime
  • Heating cables can be single overlapped without burnout, which simplifies heat tracing of in-line process equipment such as valves, elbows and pumps
  • Chromalox U-Series Connection Kits reduce installation time


Chromalox SRP heat trace cable is available in 5, 10 and 15 w/ft. This range of self-regulating trace heating cables increase power output as temperatures falls to provide reliable frost protection and temperature maintenance of industrial process and water pipework.

  • Approximate Cable Size : 0.47″ W x 0.20″ H
  • Maximum Maintain Temperature : 110° Celsius
  • Maximum Continuous Exposure Temperature : Power Off 135° Celsius
  • Available Models (Voltages) : 120 and 208 – 277V
  • Minimum Cable Bend Radius : 1-1/8″
  • Trace Heating Cable Circuit Lengths : Up to 750 feet


Chromalox Cable Part Number Trace Heating Cable DescriptionVoltageW/ft
387161Chromalox SRP 5-1C120V5
387217Chromalox SRP 5-2C240V
387188Chromalox SRP 5-1CT120V
387225Chromalox SRP 5-2CT240V
387102Chromalox SRP 10-1C120V10
387170Chromalox SRP 10-2C240V
387129Chromalox SRP 10-1CT120V
387196Chromalox SRP 10-2CT240V
387065Chromalox SRP 15-1C120V15
387110Chromalox SRP 15-2C240V
387073Chromalox SRP 15-1CT120V
387137Chromalox SRP 15-2CT240V

Chromalox SRP Thermal Output Ratings On Insulated Metal Pipe

Output Wattage at Alternate Voltages (W/Ft.)

Chromalox Part Number208V% Change In Output220V% Change In Output277V% Change In Output
Chromalox SRP 53.85-204.25-136.45+15
Chromalox SRP 108.3-188.80-1012.50+13
Chromalox SRP 1512.75-1413.50-918.45+12

Chromalox frost protection CABLE


Chromalox SRP Self-Regulating Trace Heating Cable - Construction


  • A Twin 16 AWG Copper Buss Wires are able to provide reliable electrical current capability.
  • B Semiconductive Polymer Core Matrix is the ‘self regulating component of the cable and it’s electrical resistance varies with temperature.
  • C Fluoropolymer Jacket is flame retardant and electrically insulates the matric and buss wires and provides corrosion resistance.
  • D Tinned Copper Braid that provides additional mechanical protection in any environment, and a positive ground path.
  • E High Temperature Fluoropolymer Overjacket is a corrosion resistant, flame retardant overjacket is highly effective in many environments.


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

Hazardous Area Heating Cables

Hazardous Area Heating Cables

FM Approved

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

ATEX Approved

  • CE 1725 IIG Ex e IIC T4 Gb Ta -40˚C to 70˚C

IECEx Approved

  • FMG 17.0015x Ex e IIC T4 Gb Ta -40˚C to 70˚C

➡ Chris Myers, Product Manager at Chromalox, explains about their heat trace cables and product offering including self regulating trace heating cable.

Industrial Electrical Heating Specialists

We can specify and supply from stock an extensive range of Electrical Heating Equipment for industrial and process heating applications -this includes temperature maintenance and frost protection (Winterisation) products for pipework, valves, IBC’s, drums, hoses, tanks and vessels. We produce custom silicone heaters for rapid and high temperature heat-up of complex shapes and surfaces – from concept, design to the delivery of standard or bespoke heaters on the shortest lead times. From the largest UK heat tracing cable stocks we deliver Electric Trace Heating Systems for pipework frost protection, ramp heating, roof/gutter snow melting and de-icing – enquire about our in-house design service.