TempZone™ Floor Heating Ruler Cable 240V, 315 ft. RCT-240-0315

Part Number: RCT-240-0315
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Common Support Questions

When installing electric floor heating over a concrete slab, an insulating underlayment like ThermalSheet is highly recommended to ensure efficient operation, faster heating times and warmer floor temperatures.

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When WarmlyYours electric floor heating systems are being installed on a concrete slab, we strongly recommend adding a layer of insulation over the slab prior to installing the system. While our electric floor heating provides up to 25% more heating power per square foot than many of our competitors, the slab will always act as a "heat sink." Some of the heat that would otherwise be transferred to the flooring surface will remain in the slab, causing the floor’s surface temperature to be considerably lower. This is true with any electric radiant floor heating system.

When installed on top of a concrete slab without insulation, it is generally accepted that electric floor heating will take the chill away from the floor and provide a small amount of warmth. Adding insulation on top of the slab and beneath any electric radiant floor heating system will allow a greater percentage of the heat generated to transfer to the flooring surface. This results in greater efficiency and therefore faster warm up times, higher expected surface temperatures and lower energy usage. The floor will have the capacity to warm to a comfortable temperature, and in some cases can be employed as the primary heat source for that room.

The recommended types of insulation are natural cork, insulated tile backer boards and insulated underlayment, such as ThermalSheet™ synthetic cork.

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WarmlyYours has recently begun including floor sensors with our heating elements to help ensure customers will have everything they need for optimal operation of their radiant heating systems.

The sensor included with your floor heating element can be installed with the heating system (the sensor is equally spaced between runs of the heating wire--see your install manual for more info). Installing this sensor with your floor heating control will enable energy efficient operation of the floor warming system based on the floor temperature instead of the ambient room temperature.

We generally recommend that you install a second, unconnected backup floor sensor alongside the primary one. In the very unlikely event that your first floor sensor is damaged, this install method will save you from having to pry up flooring to replace a floor sensor. You simply disconnect the damaged sensor from the thermostat and connect the backup sensor.

In addition to the floor sensor that was included with your heating element, our nSpiration Series thermostats also come with a floor sensor. If you purchase both a heating element and an nSpiration Series thermostat from WarmlyYours, you'll have a primary and a backup floor sensor for your system.

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Publications and Manuals



Amps 4.86 A
BTU Per Hour 3975 Btu
Floor Load 1.2
Ohms 49.4 Ω
Ohms Per Ft 0.157 Ω
Voltage 240 V
Watts 1165 W

Warranty / Certifications

Approvals cULus
Warranty 25 Year Warranty
Wet Location Listed US, Canada


Country of Origin (COO) India


Floor Types Tile, Marble, Stone, Vinyl, LVT, LVP, Wood (except Nailed Hardwood), Bamboo, Carpet.
Ideal Cable Spacing with Competitor's Membrane 3.5″
Ideal Cable Spacing with Fixing Strips 3″
Ideal Cable Spacing with Prodeso Membrane 3.75″

Product Dimensions

Length 315′


SKU RCT-240-0315
UPC (GTIN-12) 881308076382



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