scope:

This Standard specifies small switches for indoor use which are mounted mainly on indoor and outside walls of housing and the like, used in cable runs of a.c. 300 V or less and 20 A or less with a frequency of 50 Hz or 60 Hz at 40 °C or lower in ambient temperature, for lamps or small electrical appliances (hereafter referred to as "switches").

This Standard applies to switches with pilot lamp, time delay switches, sensor switches, timer switches, electronic switches, wide handle type switches, switches for indoor-wiring synthetic resin duct and water proof type switches.

This Standard does not apply to switches with automatic breaking mechanism, explosion-proof switches, electromagnetic remote control switches, specially designed switches used for a certain small electrical appliance and other special switches and switches which start and stop motors (including ones incorporated in small electrical appliances) and dimmers which control luminance of illumination.