Empty enclosures for low-voltage switchgear and controlgear assemblies. General requirements Ingestion-build-228203 NA to BS EN 1991-1-7

NA to BS EN 1991-1-7 gives:

specifies the requirements for alarm transmission systems utilizing dedicated alarm transmission paths which are additional to those specified in EN 50136-1-1

Some rules are given in EN 206‑1

design requirements have been described in detail in BS 6396

are available for the 525 line-60 field systems

Empty enclosures for low-voltage switchgear and controlgear assemblies. General requirements Ingestion-build-228203 NA to BS EN 1991-1-71 Scope This International Standard applies to empty enclosures, prior to the incorporation of switchgear and controlgear components by the user, as supplied by the enclosure manufacturer. This standard specifies general definitions, classifications, characteristics and test requirements of enclosures to be used as part of switchgear and controlgear assemblies (e. g. in accordance with the IEC 61439 series), the rated voltage of which does not exceed