DS EN 50085-2-1:2006 Cable Trunking Systems And Cable Ducting Systems For Electrical Installations - Part 2-1: Cable Trunking Systems And Cable Ducting Systems Intended For Mounting On Walls And Ceilings Defines requirements and tests for cable trunking systems (CTS) and cable ducting systems (CDS) intended for the accommodation, and where necessary for the electrically protective separation, of insul