BBTRZ is commonly known as fire cable. Able to withstand 3 hours without breakdown of the 1000V voltage at 950 degree flame temperature. This cable is the second generation of mineral cable products, in addition to the first generation of rigid (rigid) mineral cable fire, explosion-proof, heat resistance, load flow, but also has the following characteristics: not easy to absorb moisture insulation performance is more stable, can be multi core, fixed length production, without the need of indirect head, flexible structure, easy to bend, without special terminal, without the worry, the general electric power can be used in conventional cable laying method.