DIN EN 50085-2-2-2009 電氣裝置用電纜中繼系統和電纜導管系統.第2-2部分:安裝地板、地板齊平或地板內部用電纜中繼系統和電纜導管系統的詳細要求. 德文版本EN 50085-2-2-2008
Cable trunking systems and cable ducting systems for electrical installations - Part 2-2: Particular requirements for cable trunking systems and cable ducting systems intended for mounting underfloor, flushfloor or onfloor; German version EN 50085-2-2:200