44
5
Control, Monitoring and Power
Distribution
Raychem-IM-H58067-IceStopRoofGutterDeIcingCOM-EN 18/01
5.2
Power Distribution
Once the heating cable circuits and control have
been defined, you must select how to provide power
to them. Power to the IceStop heating cables can
be provided in several ways: directly through the
controller, through external contactors, or through
SMPG or HTPG power distribution panels.
WARNING: To minimize the danger of fire from
sustained electrical arcing if the heating cable is
damaged or improperly installed, and to comply
with the requirements of Thermal Management,
agency certifications, and national electrical codes,
ground-fault eq-uipment protection must be used on
each heating cable branch circuit. Arcing may not be
stopped by conventional circuit protection.
Single Circuit Control
Heating cable circuits that do not exceed the current
rating of the selected control device shown in Table 8
can be switched directly.
Group Control
If the current draw exceeds the switch rating, or
if the controller will activate more than one circuit
(group control), an external contactor must be used.