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Chromalox CWM Constant Wattage Medium Temperature Heating Cable

Links to other products:
Chromalox SRL Self-Regulating Low Temperature Heating Cable
Chromalox SRM/E Self-Regulating Medium Temperature Heating Cable
Chromalox SRF-RG Roof and Gutter Heating Cable
Chromalox Mineral Insulated Heating Cable

Chromalox Electric Heaters and Controls
Mor Electric Heating is an authorized distributor for Chromalox


Medium Temperature Cut to Length in Field Constant Wattage Output

A. Twin 12 AWG Copper Buss Wires Provide reliable, consistent electrical current.
B. FEP Insulation Jacket Electrically insulates buss wires.
C. Pairing Jacket Secures two buss wires together and provides wrapping surface for Nichrome wire.
D. Nickel Chromium Wire 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 Plated copper braid increases robust construction, provides ground path and provides additional protection in any location. Suffix C in model number.
G. FEP Overjacket (optional) Fluoropolymer overjacket, over the braid, provides protection from most aqueous and chemically corrosive solutions. Suffix T in model number.


Uniform Thermal Output
Accurate, Easy to Control and Monitor
Low Energy Cost
No Inrush at Any Ambient
Industrial/Process and Commercial/Construction Applications
Flexible to Most Any Configuration
Fluoropolymer Jacket
Maximum Exposure Temperature, Power Off, 392F (200C)
Steam Cleanable on Process Equipment Up to 190 PSIG (Power Off)
4, 8 and 12 W/Ft.
120, 208 - 277 and 480 Volt From Stock

Chromalox CWM constant wattage heating cable is a proven, reliable solution for industrial process temperature maintenance and freeze protection. CWM features a parallel heating core that produces uniform thermal output over its entire length. Using a single power point, you can easily configure and install a heat tracing system as short as several feet or as long as 780 feet right in the field. System design only requires that you match the CWM cable thermal output to the heat loss of your piping system. CWM is flexible at most ambient temperatures and can be wrapped around piping and complex fittings. It is rugged, easy to monitor and maintain temperature, and has zero inrush at start-up. With 392F (200C) fluoropolymer electrical insulation overjacketing, CWM has outstanding electrical and thermal properties, and is well suited for most chemically hostile environments. An extensive range of wattages and voltages are available immediately from Chromalox stock.

Durable, non-aging fluoropolymer jacket ensures long service life and can be used in most hostile environments.
Flexible, easy to install on most equipment and delivers long-term reliable performance.
No Inrush current.
Accurate temperature, reliable electric heat that can be consistently controlled and easily monitored.
Safe and rugged.
Parallel circuitry allows cut-to-length.
High performance, rated to withstand up to 392F saturated steam (190 psig) temperature (power off).
Low profile, uses standard size thermal insulation on piping and process equipment.

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 Class2.
1. Depends on specific model.
2. Exception: Cable surface temperature shall not exceed 190C in Class II, Div. 2, Group F; 165C in Class II, Div. 2, Group G.

Note: The CWM cable is sold by the foot and therefore a custom order.  Once the order is placed it cannot be cancelled or returned once you receive the cable.  This is because the cable is cut to length here, or at Chromalox, for your order, from your requested length.


Fiberglass cloth tape roll with thermosetting silicone adhesive. 3/4" (1.9 cm) wide x 108 ft. (32.91 m) long roll. Flame retardant glass cloth tape. Tape will not shrink or break. It will withstand temperatures up to 500F (260C).  Part#: SM431



Aluminum tape roll with a pressure-sensitive acrylic adhesive backing. 2" (5.08 cm) wide x 150 ft. (54.86 m) long roll, 200 F (93C) rated. 2 mil. thickness (Specifications may vary.) Minimum application temperatures 40F (5C). Part #: AT-1



CL-1 Caution Labels -
5 electric heat tracing caution labels, weather resistant



RTES High Temperature End Seal Fitting Kit


RTAS Ambient air sensing thermostat

RTBC Line sensing mechanical thermostat

Other Accessories:

   DL  EL
Power Connection  Heat trace to electrical service connection  RTPC  RT-JBC-1
Splice & Tee  RTST  RT-RST
Thermostat  Ambient air sensing thermostat  B-100/B-121
Thermostat  Line sensing mechanical thermostat  E-100/E-121
Thermostat  Line sensing electronic thermostat  RTSS  N/A

Chromalox CWM Installation Instructions
Chromalox Accessories Installation Instructions
Chromalox Accessories Product Information Sheet
Chromalox Accessories Product Data Sheet
Chromalox Accessories Installation Instruction Sheet
Chromalox Design Guide

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delivery time: typically ships in 5-7 workdays or less plus allow additional time for your selected UPS or FedEx shipping method. Price below does not include shipping cost which is calculated using your address before entering your credit card number.

Item ID Catalog No.

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CHROM392040 CWM-4-1C 4W/FT 120V


CHROM392059 CWM-4-2C 4W/FT 240V


CHROM392139 CWM 8-1C 8W/FT 120V


CHROM392147 CWM 8-2C 8W/FT 240V


CHROM392227 CWM 12-1C 12W/FT 120V


CHROM392235 CWM 12-2C 12W/FT 240V


CHROM392075 CWM 4-1CT 4W/FT 120V


CHROM392083 CWM 4-2CT 4W/FT 240V


CHROM392163 CWM 8-1CT 8W/FT 120V


CHROM392171 CWM 8-2CT 8W/FT 240V


CHROM392251 CWM 12-1CT 12W/FT 120V


CHROM392260 CWM 12-2CT 12W/FT 240V


CHROM389570 RTES High Temperature End Seal Fitting For Terminating Cable


CHROM389600 RTBC Line Sensing Mechanical Thermostat (0 to 400F Setpoint Range)


CHROM389589 RTAS Ambient Air Sensing Thermostat (0 to 225F Setpoint Range)


CHROM382424 CL-1 Caution Labels (5 Labels Per Package)


TAPE10004 SM431 3/4" Fiberglass Cloth Tape, 3/4" x 36 yds


CHROM383355 AT-1  Roll of Aluminum Tape, 2" Wide x 150 ft Long


ETI22744 ETI SST-2 Freeze Protection Thermostat


Chromalox is a registered trademark.

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We are a Distributor of Industrial, Commercial and Residential Heaters and Controls. Always consult manufacturers installation instructions for proper installation of the products or systems shown on this website. © Copyright 1999-2019 Mor Electric Heating Assoc., Inc.

5880 Alpine Ave. NW - Comstock Park, MI 49321  USA
Tel 616-784-1121 - 800-442-2581 - Fax 616-784-7775

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