ENTWURF EN 50160 prAC : merkmale der spannung in offentlichen elektrizitatsversorgungsnetzen / Europaisches Komitee Fur Elektrotechnische Normung
EN 50160 prAC : caractéristiques de la tension fournie par les réseaux publics de distribution projet / Comité Européen de Normalisation Electrotechnique
Sectional specification for work area wiring cables with a common overall screen for use in digital communication : EN 50168 October 1994 / European Commitee for Electrothecnical Standardization
Sectional specification for backbone cables, riser and campus with a common overall screen for use in digital communication : EN 50169: October 1994 / European Commitee for Electrothecnical Standardization