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ProMelt • 30 Square Foot Snow Melting Cable (277V)

SKU# SC50277030

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ProMelt electric radiant snow melting cables are the most versatile and lowest cost option for snow melting installation any size, any shape - quickly providing electrically heated walkways and driveways. Cables are ideal for steps, curved or angled areas. Cables can be used for simple rectangular areas too, but mats install faster and easier in those situations.

Environmentally friendly snow and ice removal in the worst conditions is possible without using salt or hazardous chemicals. ProMelt provides energy efficiency and easy installation.

ProMelt heated snow melting cables are manufactured by SunTouch Watts Radiant (pioneers of indoor radiant heat). You choose your configuration and secure to rebar/mesh or using our Cable Strap on a base surface; maintaining proper and consistent spacing of cables is your job. Larger spacing means less heat but more coverage per cable.

Cables cost 10-15% less than mats and give you layout and heat output options since you control the spacing and determine the layout. Consider ProMelt Mats for a quicker and easier installation (the spacing is already done for you) for just a few dollars more. (See Specifications)

ProMelt is an effective, reliable and invisible snow melting system that will serve you for many years. Projects of 350 SF or less require cables and a snow sensor-controller and are very affordable and convenient.

ProMelt Snow Melting Benefits:

  1. ProMelt cables provide versatility and allow you to control the Watts per Sq Foot between 38 and 50.
  2. Automatically activates only when needed means your driveway and sidewalks stay clear and you never forget to turn the system off.
  3. No plowing or scraping means your walkway and driveway look better and last longer
  4. Maintenance Free permanent installation. Not like Hydronic systems (water) with pumps, boilers, etc
  5. Increase safety and reduce liability with ProMelt
  6. No hazardous chemicals to damage your landscaping or the environment
  7. No waiting for the plow or shovel to arrive - Dependable automatic snow sensor once moisture and temperature conditions are met activates ProMelt.
  8. Save Money - Eliminate snow removal labor costs
  9. The best construction using premium materials means ProMelt is built to last
  10. Increase the value of your home with an automatic ProMelt System

Installation Demo

Instructions + Video

Instructions + Video

Instruction Manual
Skill Level Installation only by qualified persons. Electrician recommended for wiring. Read More
Passes Impact Testing (CSA-130 impact rating) Yes. Exceeds the required rating
GFCI / GFEP Protection Required for each circuit at the panel.
Maximum Circuit Load 30 or 50 Amps @ 240v, depending on controls chosen
Maximum Circuit Overload Protection 70 A Breaker.
Recommended Insulation Resistance test by Electrician Use a Megohmeter - see manual
Electrical Box Size Suitable outdoor junction boxes as needed
Full Length End-to-End ground wire Yes. Braided copper ground plane
National Electric Code reference ANSI/NFPA 70 especially Article 426. Plus any local code requirements
Spacing of attachment to Mesh/Rebar or surface Every 24" using cable ties (no metal)
Distance from Edges of Concrete/Asphalt Minimum 6" from edge of slab or 12" for asphalt without a curb
Minimum Depth 1.50" inches below top of heated surface-completely covered : See Installation Manual
Recommended Method and Depth for Slab Use Chairs/dobies so rebar/Mesh ProMelt is attached to is in top 2" of slab - See Installation Manual.
Recommended Method and Depth for Asphalt Attach ProMelt over cooled asphalt base layer- Cover with hand shoveled final asphalt layer min 1.5 inch thick-DO NOT DRIVE machines on exposed ProMelt. Roll with small roller or compactor. - See Installation Manual
Recommended Method and Depth for Pavers in sand Minimum 1.5 inches sand over cables, max paver thickness of 2.50 inches - See Installation Manual
Recommended Method and Depth for Pavers in Concrete Maximum 2.50" total thickness over cables - See Installation Manual
Recommended Method and Depth for Tile/Stone See Installation Manual and TCNA guidelines; 1.25 inch minimum
Suitable Installation Surfaces / Materials: Embedded in Concrete, Asphalt, Pavers in sand or concrete, Thickset mortar on slab. -See Installation Manual
Do Not Install in other surfaces Not in Dirt, gravel, walls, etc. ONLY approved installations
Maximum exposure temperature 285°F (140°C) Short-term max. for asphalt covering
Minimum Install Temperature 40°F (4.5°C)
Layout Flexibilty No - example in manual. We provide Layout Maps only for MATS
Insulation Recommended No Insulation. Vehicular traffic can compress insulation causing problems.
Outdoor Installation Only Outdoor Snow Melting or Heating Application only.
Cut Warning No. Never cut the heating elements to shorten


Voltage 277 VAC
Wattage per SF 50
Cable Length 118' ft. feet
Cable Length (inches) 1416" in. inch
Cable Length (meters) 35.76 m meter metre
Heating Power Output per Hour (BTU) 170 BTU per Sq Ft/Hour
Heating Power Output Total 5100 BTU total
Manufacturer Watts Radiant
Power Lead Type Armored, NEC color code, Single point connection at 1 corner of mat. No return wire like inferior products
Power Lead Length 20 Feet
Power Lead Wire Gauge 14 AWG
Thickness 1/4" in. inch
Spacing of Heating Wire 3" - 3.5" - 4" on center
Minimum Bend Radius 1 inch
Resistance Value 46 - 57 ohms
EMF (Electro Magnetic Field) Yes. Verified by Independent Testing Laboratory as ultra low.
Thermostat Control Required? Automated Snow Sensing Controller recommeded for safety and lower energy use
BTUs/SF/Hr 1 170
BTUs/SF/Hr 2 150
BTUs/SF/Hr 3 130
Spacing between runs 1 3
Spacing between runs 2 3.5
Spacing between runs 3 4
Watts Per SF 1 50
Watts Per SF 2 44
Watts Per SF 3 38
Heated SF 1 30
Heated SF 2 34.5
Heated SF 3 29
More Details

More Details

Why Helps

ProMelt Cables provide the most flexible and low cost installation than any snow melting system in 3 easy steps once you have read all instructions, planned the electrical details, and prepared your jobsite:

  1. Determine cable spacing and layout we suggest using a spacer like a piece of wood
  2. Unwind cable(s) to fit any shape area and around obstacles or up steps
  3. Secure the cable onto the prepared base surface using CableStrap or cable ties to wire mesh/rebar

The ProMelt radiant heating cables are built tough for Permanent installation within virtually any surface to provide efficient melting of snow and ice automatically. They must be completely embedded and at least 1.25 inches below the top of the new layer.

  • New Concrete Surfaces install in top 2 inches secured to rebar or wire mesh on supports/chairs
  • New Asphalt on top of base layer. ProMelt's polyurethane outer insulation layer withstands 300 Degrees F
  • Pavers or brick set in compacted sand beds or in mortar
  • Stone or tile set in thickset mortar. Building Code requires all outdoor systems to be 1.25 inches below the top of the new surface
  • Not for use in gravel or dirt - must be embedded as described above
Warranty 10 year warranty backed by USA Manufacturer since 1873
Amp Draw 5.4
Wire Construction ETFE Fluoropolymer, Braided copper ground plane, Foil shield and Outside polyurethane jacket
Total Watts 1500 watts @ 3" inch spacing
Custom Size Options None. Standard lengths only. No customization
Safety Listing ETL Listed for U.S. and Canada under UL (Underwriters Laboratory) 515, IEEE 515.1, and CAN/USA C22.2 No. 130-03 : Listing file number: 3151992
Canadian Electric Code reference Section 62 (CEC) Part I. Plus any local code requirements
Repair Information Yes, Wire can be repaired. Repair kits and assistance available.

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