BS 764:1990

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Specification for automatic change-over contactors for emergency lighting systems|Single-phase current, Contactors, Rated current, Electric contacts, High-voltage tests, Type testing, Low-voltage equipment, Lighting systems, Switches, Temperature measurement, Relays, Temperature-rise limit, Instructions for use, Force, Electrical testing, Marking, Switchgear, Making capacity, Performance, Direct current, Breaking capacity, Emergency lighting

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