Chromalox CWM Constant Wattage Trace Heating Cable to 392°F (200 °C)

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Chromalox CWM Constant Wattage Trace Heating Cable to 392°F (200 °C)

Trace Heating Cables & Systems – Design & Supply From Stock

Chromalox CWM Heat Trace Cables – Trace Heating

Trace Heating

Chromalox CWM constant wattage trace heating cables are designed for use on 120 to 480V and withstands temperatures to 200 °C- with CSA, FM and UL certification Chromalox CWM heat trace cables are suitable for Zone 1 and Zone 2 hazardous areas.

Chromalox CWM Constant Wattage Trace Heating Cable – Features

  • Durable with a non-aging fluoropolymer jacket ensuring long service life
  • Suitable for use in tough arduous environments
  • Flexible, easy to install on most equipment and delivers long-term reliable performance
  • Eliminates the need for oversized wiring or switchgear
  • Accurate temperature, reliable electric heat that can be consistently controlled and easily monitored



Chromalox CWM heat trace cable wattages per metre – 4, 8 and 12 watts.

  • Approximate Cable Size : 1/4″W x 1/8″H
  • Maximum Maintain Temperature : 200° Celsius
  • Available Models (Voltages) : 120 to 480V
  • Minimum Cable Bend Radius : 1-1/4″
  • Trace Heating Cable Circuit Lengths : Up to 780 feet

Chromalox CWM constant wattage trace heating cable is ideally suited for applications where a particular watt density is required at all times


Product Offering

Part Number Trace Heating Cable Description
392040Chromalox  CWM-4-1C 4W/FT 120V
392059Chromalox CWM-4-2C 4W/FT 240V
392075Chromalox CWM 4-1CT 4W/FT 120V
392083Chromalox CWM 4-2CT 4W/FT 240V
392139Chromalox CWM 8-1C 8W/FT 120V
392147Chromalox CWM 8-2C 8W/FT 240V
392163Chromalox CWM 8-1CT 8W/FT 120V
392171Chromalox CWM 8-2CT 8W/FT 240V
392227Chromalox CWM 12-1C 12W/FT 120V
392235Chromalox CWM 12-2C 12W/FT 240V
392243Chromalox CWM/E 12-4C 12W/FT 480V
392251Chromalox CWM 12-1CT 12W/FT 120V
392260Chromalox CWM 12-2CT 12W/FT 240V
392278Chromalox CWM-12-4CT 12W/FT 480V


Chromalox cwm Output Wattage at Alternate Voltages (W/Ft.)

Chromalox Part NumberOutput (W/Ft.)Nominal Voltage (Vac)Circuit Load (Amps/Ft.)Max. Circuit Length (Ft.)
Chromalox CWM 4-1CT41200.033350
Chromalox CWM 8-1CT81200.067240
Chromalox CWM 12-1CT121200.100200
Chromalox CWM 4-2CT42400.017700
Chromalox CWM 8-2CT82400.033480
Chromalox CWM 12-2CT122400.050400
Chromalox CWM 12-4CT124800.025780


Cable Construction

Chromalox CWM Constant Wattage Trace Heating Cable - Construction


A Twin 12 AWG Copper Buss Wires are able to provide reliable electrical current capability.

B FEP Insulation Jacket is used to electrically insulates buss wires.

C Pairing Jacket secures two buss wires together and provides wrapping surface for Nichrome wire.

D Nickel Chromium Wire is the heating component of the cable.

E FEP Insulation rugged outer sheath protects heating cable, assures longer service life, and provides protection against environmental application hazards.

F Tinned Copper Braid that provides additional mechanical protection in any environment, and a positive ground path.

G FEP overjacket that provides protection from most aqueous and chemically corrosive solutions.


UL Listed for ordinary areas.

CSA Certified for ordinary and:

  • Class I, Div. 2, Groups A, B, C, D
  • Class II, Div. 2, Groups F, G. Rated T3 Temperature Class (Exception: Cable surface temperature shall not exceed 190°C in Class II, Div. 2, Group F; 165°C in Class II, Div. 2, Group G)

Chromalox video with Chris Myers Product Manager at Chromalox explaining about their heat trace product offering including self regulating trace heating cable.


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Trace Heating Cables – providing process heating to pipework, vessel and bulk storage drums.


Chromalox technical manual covering trace heating cable selection, design, heat loss calculation, heat transfer fundamentals and radiant infrared heating theory.


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