EN 50085 -1 : February 1997: cable trunking systems and cable ducting systems for electrical installations: part 1: general requirements / European Commitee for Electrothecnical Standardization
EN 50085 -1/A1 : October 1998: cable trunking systems and cable ducting systems for electrical installations: part 1: general requirements / European Commitee for Electrothecnical Standardization
Conduit systems for electrical installations : part 2-1: particular requirements for rigid conduit systems: EN 50086 -2-1: May 1995 / European Commitee for Electrothecnical Standardization
Conduit systems for electrical installations : part 2-1: particular requirements for rigid conduit systems: EN 50086 -2-1/A11: December 1998 / European Commitee for Electrothecnical Standardization