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Snow Melting Sensors Support

Snow Melting Sensors Support

Snow melting sensors tell your control when to run. Aerial sensors read air temperature and precipitation above the surface; pavement and slab-mounted sensors read moisture and temperature in the slab itself. Identify your model below for its installation manual, wiring diagram, ohm values and specifications.
This support page provides publications, manuals, videos, support articles, and common support questions for the Snow Melting Sensors product line.

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Support Questions

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GFEP is the National Electric Code (NEC) required protection for fixed outdoor deicing and snow-melting equipment, which may be accomplished by using circuit breakers equipped with ground-fault equipment protection (GFEP) of 30 mA. It is important to understand that this required equipment protection is NOT the same as a 5 mA GFCI used for personal protection.

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When the design requirement's amp draw exceeds the selected controller's capacity.

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The most common spacing for snow melting systems is 3“ from wire to wire. However, we can design snow melting systems based on your local climate and weather expectations that might have different cable spacings to ensure the most efficient system possible. We also offer snow melting mats with 3" and 4" spacing.

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In an area free of obstruction and able to detect rain or snow, yet low enough so that it is easily accessible if service is needed. Atop a fence post or on an 'L' bracket on the side of a building are common.

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The electrician must route the cold lead(s) through rigid metal conduit(s) or other approved means, to get back to an accessible weatherproof junction box(s). Care must be taken by the electrician so that none of the heated section of Cable enters the conduit(s).

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It depends on how the system is intended to operate. If the expectation is manual operation (ex. WiFi or Timer Control), then no sensors are required. If the expectation is automatic operation, then the system will require at least one snow sensor.

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Minimum is 1.5“ and Maximum is 2.5“

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Ground fault equipment protection (GFEP) is intended to provide protection for equipment against damaging line-to-ground currents by disconnecting all ungrounded conductors of the faulted circuit.

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No, a sensor is not required with the snow melt system. However, certain automatic controllers require a temperature/moisture sensor to sense atmospheric conditions and may also require an in-slab, high temperature limit sensor to be installed (notably, asphalt installations).

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A 2 pole single-phase 240V circuit works by continuously monitoring the current flowing through both hot wires of the circuit. If it detects even a slight imbalance between the current on each hot wire (indicating a ground fault), it will quickly trip, cutting off power to the circuit. Essentially, it compares each leg of the 240V circuit and trips if they are not precisely equal.

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This feature prevents the snow melting system from running, by default, in temperatures below 17°F (–8.33°C), or as set by the user. At temperatures this low, it becomes difficult for the system to effectively melt the snow. It is, however, possible to turn off this feature should the system be required to keep running during these low temperatures.

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Multiply the heated area by the installed watts per square foot, divide by 1,000 for kilowatts, then multiply by your electricity rate. At 50 W/sq ft, every 100 sq ft draws 5 kW, or $1.00 per energized hour at an illustrative $0.20/kWh. For example, a 400 sq ft full-coverage driveway draws 20 kW: $4.00 per energized hour, or $24.00 for six energized hours. Tire tracks heat less area, so they cost proportionally less. Your seasonal bill depends on how many hours the system is energized, including preheating and the controller’s drying cycle, which varies with the weather. These are examples, not typical bills; enter your own area, rate and runtime in our snow melting cost calculator.

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Operating cost depends on the heated area, installed wattage, your electricity rate and how many hours the system is energized. For example, 100 sq ft at 50 W/sq ft draws 5 kW (100 × 50 ÷ 1,000). At an illustrative $0.20/kWh, that is $1.00 per energized hour, or $6.00 for six energized hours. This is an example, not a typical bill. What changes your total:

  • Heated area and coverage (full area or tire tracks)
  • Installed watts per square foot
  • Your local electricity rate
  • Runtime, including preheating, snowfall and the controller’s drying cycle

Enter your own numbers in our snow melting cost calculator.

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The best home features for cold climates include a simple gable roof to shed snow, covered entrances for protection, airtight triple-pane windows to prevent heat loss, and radiant heating systems. These features work together to maintain interior warmth, reduce energy bills by up to 25%, and ensure structural safety during harsh winters.

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