These requirements cover individually enclosed air switches, rated 4000 A or less at 600 V or less,
having all current-carrying parts enclosed, manually operable by means of external handles, and intended
to be employed in accordance with the national i
CSA C22.2 No.4-04-2004 history
2004CSA C22.2 No.4-04-2004 Switches under box and for insulating panel Seventh Edition; Update 1: 4/2006; Update 2: 07/2006