Heat Cable Options - The Technical StuffResidential heat cable is available in factory made lengths up to 240 feet, it has a fixed heat output of 5 watts per foot, operates at only 120 volts, has a medium life span and is more economical. Commercial grade heat cable has a self regulating core that automatically adjusts its heat output - 2 watts to 12 watts per foot depending on ambient temperature ( 6 watts per foot at 40 degrees F.), is very effective in the most severe icing conditions, can operate at 120 volts thru 277 volts which allows much longer runs from one power source, has a long life span, is installed on "high end" residential applications, as well as commercial roofs and gutters, and has a permanent attachment system to the roof. Both Residential and commercial heat cable systems often times require new dedicated electrical circuits to be installed from a main panel or subpanel to support the additional amperage from multiple runs of heat cable. All heat cable systems require GFCI protection. Controllers range from a manual switch, to- automatic digital timers, to- preset or adjustable automatic ambient sensing thermostatic controllers, to- automatic moisture & ambient sensing thermostatic controllers. Residential Heat CableResidential Grade Heat Cable Installation:Heavy Duty Grade Heat Cable (Ice Melt Cable) Roof Top Installation:
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