Inorganic mineral insulated cable, also known as flexible fireproof cable, its conductor is made of stranded copper wires, with multi-layer mica tape as insulating layer, mica tape is made of glass fiber cloth as base material, and the outer layer is longitudinally wrapped and welded with copper tape. It is closed to form an outer sheath, and the smooth outer sheath is pressed into a spiral shape. It is mainly used in construction industries such as offices, hotels, hotels, conference centers, subways, highways, light rails, hospitals and other densely populated and underground places, and industrial and mining enterprises such as chemical, metallurgy, electric power, and high temperature.NG-A (BTLY) Aluminum Sheathed Continuous Extruded Mineral Insulated Fireproof Cable NG-A(BTLY) cable is a new-generation mineral insulated cable developed based on BTTZ cable. In addition to the advantages of BTTZ cable, it also overcomes the problems and defects of BTTZ cable. And because the production length is unlimited, no intermediate joints are required. It saves 10-15% in investment cost than BTTZ cable.