Electrical installations of buildings : part 4: protection for safety: chapter 44: protection against overvoltages: section 442: protection of low-voltage installations against faults between high-voltage systems and earth: HD 384 .4.442 S1: January 1997 / European Commitee for Electrothecnical Standardization
HD 466.6 S2 : methods of measurement for radio equipment used in the mobile services: part 6: selective-calling and data equipment: (IEC 489-6: 1987 + A1: 1989) / European Commitee for Electrothecnical Standardization
HD 608 S1 : July 1992: generic specification for symmetric pair/quad and multicore cables for digital communication / European Commitee for Electrothecnical Standardization
HD 608 S1 : Juillet 1992: specification générique pour câbles multiconducteurs à paires symétriques et quartes pour transmission numérique / Comité Européen de Normalisation Electrotechnique
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