77th Edition, December 30, 1977
Specification for Electronic Variable Control Switches (Dimmer Switches) for Tungsten Filament Lighting
Includes all amendments and changes through Reaffirmation Notice , May 15, 1999
Superseded By: BS EN 60669-2-1
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Description / Abstract:
Safety and some performance requirements for manually operated wall mounted switches. Specifies limits for radio frequency interference.