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BS EN 50171:2001 Central power supply systems
Specifies the general requirements for central power supply systems for an independent energy supply to essential safety equipment. Covers systems permanently connected to a.c. supply voltages not exceeding 1,000V and that use batteries as the alternative power source.
British Standards Institution
With over 100 years of experience the British Standards Institute is recognised as the UK’s National standards body. Their committees work with the manufacturing and service industries, government, businesses and consumers to facilitate the production of British, European and International standards.
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