Current
Mechanical & Electrical Supplement
BS
Presents recommendations for the management, design, setting up and operation of temporary electrical systems using low voltage a.c. electricity, for entertainment and related purposes. Covers systems operating at low voltage and supply equipment normally operating at 230 V a.c. or 400 V a.c. 50 Hz.
BS 7909:2023+A1:2024 supersedes BS 7909:2023. Supersedes BS 7909:2011. Came into effect 31 January 2023. Amendment dated March 2024 - A1: see Foreword
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