13
03 Electrical Rough-in
Warmset heating mats must be connected to a circuit breaker to
protect against circuit overload. Use a 120-VAC single-pole breaker
for 120-VAC systems. Use a 240-VAC double-pole breaker for 240-
VAC systems. A ground fault circuit interrupter is required. If there
is no GFCI built in to the chosen thermostat, one must be installed.
The required rating of the circuit breaker can be determined by the amp draw
of the given heating mats. Simply add the amp requirements from each mat
in the system. If the total amps required for the circuit exceeds 15 amps, a
second breaker must be used. The current draw must never exceed 15 amps
per breaker.
It is recommended to install Warmset mats on new, dedicated breakers; how-
ever it is possible to tap into an existing breaker if there is adequate capacity
available. Remember to leave excess current available for high-draw applianc-
es. Typical hair dryers pull 1200 watts of load, and some can draw more.
Choose a location and install an electrical box for the thermostat. Use an
extra-deep electrical box. For installations with several mats, a larger box may
be required. Electrical boxes should be located in a well ventilated area, and
placed so that the leads from any mats or junction boxes can easily reach it. It
must also be able to connect back to the chosen circuit breaker.
Run a line from the electrical box to the circuit breaker using 14 gauge type
electrical wiring, unless otherwise speci
fi
ed by local building codes. Leave at
least 6 Inches of extra cable in the box.
A junction box must be installed if multiples mats are being used, or if the
mat’s cold leads do not reach the electrical box.
Use a standard junction box and cover. Once the box is in place, run a line
from the junction box to the electrical box using 14 gauge NM type electrical
wiring, or as otherwise speci
fi
ed by local building codes.
3.1
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3.2
3.3
3.4
Note: Be very careful when cutting the mesh. If the heating element
is damaged, do not try to repair it. Please contact the manufacturer.
