Current
Core Supplement
BS EN
Covers requirements, methods of test and performance criteria relevant to power supply equipment of fire detection and fire alarm systems installed in buildings.
Supersedes BS 5839-4:1988. Amendment 14596 dated 27 August 2003 - see national foreword. Amendment 16676 dated 31 October 2006 - see national foreword. This standard is a Harmonised European Standard (hEN).
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