How are the characteristics and classification of flame retardant cables?

I. Flame retardant cable features and classification is how? 1, the structural characteristics of flame retardant cable The structure of flame retardant cable and ordinary cable structure is basically the same, the main difference lies in its edge layer, sheath, outer sheath and auxiliary materials (tape and filler) all or part of the use of flame-retardant materials. 2, flame retardant cable classification According to the different materials of flame retardant cable is divided into halogenated flame retardant cable and halogen-free low-smoke flame retardant cable two categories. Halogen-containing flame-retardant cable edge layer, jacket, outer sheath and auxiliary materials (tape and filling) all or part of the use of halogen-containing polyethylene flame-retardant materials, and thus has good flame-retardant properties. However, when the cable burns will release a large amount of smoke and halogenated acid gases, halogenated acid gases on the surrounding electrical equipment corrosive hazards, rescue personnel need to bring a gas mask to approach the scene to extinguish the fire. Cable combustion to the surrounding electrical equipment and rescue personnel caused by the hazards, not conducive to fire fighting and rescue work, resulting in serious "secondary hazards". Halogen-free low-smoke flame-retardant cable edge layer, sheath, outer sheath and auxiliary materials (tape and filler) all or part of the use of halogen-free cross-linked polyethylene flame-retardant materials, not only has better flame-retardant properties, but also in the cable combustion no halogenated acid gases are released, the amount of smoke in the cable is also small, cable combustion of corrosive gases generated by the cable flame retardant and reduce the amount of halogenated acid gases occurring to take the compromise between the way! Halogen-free, low-smoke flame-retardant cables have been developed. The amount of smoke emitted is also close to the recognized "low smoke" level.

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