Electric cables - Low voltage energy cables of rated voltages up to and including 450/750 V (U<(Index)0>/U) - Part 3-21: Cables with special fire performance - Flexible cables with halogen-free crosslinked insulation, and low emission of smoke; German version EN 50525-3-21:2011
电缆.额定电压450/750V(U<(指数)0>/U)及以下的低压能源电缆.第3-21部分:具有特殊防火性能的电缆.无卤交联绝缘低烟排放软电缆;德文版EN 50525-3-21:2011