Thermostat and bell cable. Designed for use in heating and air conditioning controls as well as in alarm systems. Features insulation made of polypropylene and covered by a brown PVC (polyvinyl chloride) jacket. Designated as Class-2 Power-Limited Circuit Cable. Sunlight resistant, ideal for indoor or outdoor use. Can be used in temperatures up to 140 degrees Fahrenheit. 150-volt maximum. UL (Underwriter's Laboratories) listed and CSA (Canadian Standards Association) certified.