Mineral Insulated Cable is unmatched working in a fire survival electrical cable system.  

With a basic inorganic construction of a copper sheath and copper conductors, together with a mineral insulant, the cable provides a unique combination of dependability, versatility, and permanence. This construction, with the melting points of 1981°F and 5072°C for copper and the insulant respectively, provides the unsurpassed Fire Survival properties which enable the cable to continue to carry current at temperatures over 1850°F. 

Due to the core materials high melting point, MI Cable will survive for over 2hrs + at 1850°F