耐火电缆的分级和特性及选用原则

目前 ,我国阻燃、耐火电缆的标准均为推荐性的测试方法标准 ,各标准之间相互独立 ,缺乏沟通和协调 ,往往按各个标准单独考核 ,缺乏衔接。最近 ,公安部发布了强制性标准 GA30 6 - 2 0 0 1《阻燃及耐火电缆 :塑料绝缘阻燃及耐火电缆分级和要求》,对耐火电缆进行了分级 ,并对耐火电缆的发烟量及烟气毒性作了综合性的规定 ,本文就此标准对耐火电缆的特性进行了分析。

Classification, characteristics and selection of fire-resistant cable

At present, the Chinese standards for fire resistant and flame retardant cables are all independent recommendations without co ordination or relation. The individual standards were prepared with its unique considerations without connections with other similar standards. The recently published mandatory standard GA 306-2001 Fame retardant and fire resistant cables: classification and requirements of plastic insulated cables by the Ministry for Public Security classifies fire resistant cables according to their combustion characteristics and specifies general requirements for the smoke density and toxicity of gas evolved during combustion of these cables. This paper analyses the requirements for the fire resistant cables set up by the new standard.