国内外电缆及光缆燃烧性能分级体系探讨

Study on Classification System for Burning Behavior of Electrical and Optical Cables Domestic and Overseas

对国际电工委员会(IEC)、美国、欧盟及中国的电缆及光缆燃烧性能分级体系进行分析、比较和综述。通过研究发现:IEC仅发布了考核电缆的火焰蔓延距离、烟密度和无卤特性等单一的试验方法标准;美国主要针对电缆的火焰蔓延、产烟等特性分为4个级别;欧盟于2014年颁布了新的燃烧性分级体系,该分级体系主要从电缆的火焰蔓延和热释放等特性分为7个级别,同时针对不同场所又从电缆的产烟、燃烧滴落物和酸度进行了附加分级;我国新发布的电缆及光缆燃烧性能分级体系与欧盟类似。

The paper analyzes, compares and summarizes the classification systems for burning behavior of electrical and optical cables of IEC, the United States, European Union and China. The study shows that IEC only issues single standard on test method such as checking the flame spread distance, smoke density and non-halogenated characteristic of electrical cable; the United States classifies 4 grades according to the flame spread, smoke production, etc. of electrical cable; European Union issued new classification system for burning behavior in 2014, under which cables are divided into 7 grades according to the flame spread, heat release, etc. and additionally graded in terms of the smoke production, flaming droplets and acidity according to different sites; and the new classification system for burning behavior of electrical and optical cables issued by China is similar to that of European Union.