Pentair's 2-hour Pyrotenax fire-resistant system is utilized for the safe evacuation of buildings and for continued operation of firefighting equipment. UL/ULC listed system ensures a minimum of 2 hours of electricity to critical emergency and life-saving equipment in the event of a fire. Pyrotenax cables are constructed of noncombustible, inorganic materials. This system can utilized in hospitals, tunnels, subways, airports, and high-rise buildings. The Pyrotenax System 1850 MI wire consists of solid copper conductors in a continuous copper sheath with magnesium powder insulation.