This product is suitable for high-rise buildings, oil fields, power stations, power plants, mines, chemical industry, subway and other occasions requiring high fire conditions. It is also an emergency standby cable for emergency power supply, fire pump and elevator communication signal system. The product has high fire resistance. Under the condition of direct combustion of flame, there is no short circuit fault within a certain period of time (not less than 3 hours). It ensures continuous power supply to maintain lighting and transmit signals, and has enough time for protection personnel to evacuate safely. It is also conducive to extinguishing fire and reducing losses.