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3. Installation Continued
Installation & Owner’s Guide 6
Electrical Installation
Step 1. GFCI Installation
Radiant Heat Film Radiant Heat for Floating Floor mats must be protected by a ground fault circuit interrupter
(GFCI). This can be done either by the internal GFCI in the thermostat (as long as it directly controls the mat), or
by a GFCI protected circuit breaker. Follow all local building and electrical codes. Typical Amperage Requirement:
120 VAC Radiant Heat Film
0.1 amps per square foot, or 10 amps per 100 square foot of mat.
Step 2. Install Additional Power Modules
Depending on the amperage requirements of the mat(s), one or more secondary power modules may be required.
Do not load the thermostat control with more than 15 amps. The National Electrical Code specifies that each
branch circuit used in conjunction with a heating system must be for the exclusive use of the heating system. Do
not connect lights, outlets, etc. to any branch circuit used with the Radiant Heat Film system.
Step 3. Install Electrical Boxes
Install Junction box for the control device (thermostat) according to the manufacturer’s instructions. This box
should be located, unobstructed, on an inside wall so that the device reads accurately.
Install a 4x4 inch junction box for making electrical connections between the mats and thermostat.
Step 4. Bottom Plate Work
Drill or saw holes at the bottom plate. One hole is for routing power leads or conduit and the other is for the
thermostat sensor. These holes should be directly below the electrical box(es). It is recommended that you drill or
saw holes at the bottom plate. You may also use a notch technique as an alternative.
Step 5. Install Power Lead Conduit
Route the power leads from the thermostat down the wall cavity through opening in the bottom of plate to
connect the mats.
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