Use and Care Manual

8
SunTouch Mat Do It Yourself Manual
Circuit Breakers and Supply Wire
Mat(s) Supply Wire Breaker
VAC total amps (AWG)* qty type** rating
120 up to 12 amps 14 1 SP 15 or 20 A
120 up to 15 amps 12 1 SP 20 A
240 up to 12 amps 14 1 DP 15 or 20 A
240 up to 15 amps 12 1 DP 20 A
* Recommended only. Follow local codes for wire gauge size.
** SP= single-pole, DP=double-pole
Phase 3: Electrical Rough-in
STEP 3.1:
Circuit Breaker (Overcurrent Protection)
SunTouch Mat(s) must be protected against overload by a
circuit breaker. GFCI type (ground fault circuit interrupter) or
AFCI type (arc-fault circuit interrupter) breakers may be used if
desired, but are not necessary.
The rating of the breaker (see Table 5) is determined by the amp
draw of the heating mats (see Table 2 or the Nameplate Label).
If multiple mats are to be controlled by one SunStat, total their
amp draws. If this total exceeds 15 amps, an additional breaker
and control will be required. The total amps on each breaker
cannot exceed 15 amps. Do not use breakers rated over 20
amps.
It may be possible to tap into an existing circuit as long as
there is adequate capacity for the mat(s) and any additional
appliance, such as a hair dryer or vacuum cleaner. Avoid circuits
which have lighting, motors, exhaust fans, or hot tub pumps
due to possible interference.
STEP 3.2:
Install Electrical Boxes
SunStat Thermostat:
Install an extra-deep electrical box for the SunStat
thermostat. Follow the instructions included with the SunStat
for complete information on location and wiring.
Junction Boxes:
If a mat is to be located so its Power lead is not long enough
to reach the SunStat directly, a junction box must be installed.
Do not attempt to make a connection to other wiring
without a junction box. Use a standard junction box with a
cover, mounting it below the subfloor, in the attic, in the wall,
or in another location easily accessible after all coverings are
complete. If the SunStat sensor wire is not long enough to
reach the SunStat directly, it may be extended. A junction
box may be required by local code to make this connection.
Follow the installation instructions included with the SunStat
for details.
For construction with an existing wall or where the wall is
covered, cut the necessary openings to mount the electrical
boxes listed above. Wait to install the boxes until all wiring is fed
into these locations to make it easier to pull the wire.
Install an extra-deep single-gang box if
connecting one or two cables to the control.
Use a 4"-square deep box with a single-
gang mud ring cover if connecting three
cables, because the extra room is needed
for the wire, wire nuts, and control.
Table 5
WARNING: To prevent the risk of personal injury
and/or death, do not perform any electrical work
unless qualified to do so. Work should be done with
great care and with power turned off to the circuit
being worked on. Follow all local building and
electrical codes.