IEC 60335-2-26 Ed. 4.0 b:2002

Deals with the safety of electric clocks having a rated voltage of not more than 250 V. Examples of appliances that are within the scope of this standard are alarm clocks, spring-driven clocks with an electrically operated winding mechanism, clocks incorporating driving means other than motors. This standard does not apply to battery-operated clocks; appliances intended exclusively for industrial purposes; appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapor or gas); clocks having other functions, whether or not in combination with time indication, such as master control clocks and timers for cooking ranges, washing machines and similar appliances; clocks for ‘clocking in’ purposes; clocks incorporating electronic circuits only(refer to IEC 60065).