This Standards Publication covers enclosed and miscellaneous distribution equipment switches that are:a. Rated at not more than 600 volts and 6000 amperes with or without a horsepower ratingb. With or without provision for fusesc. With current-carrying parts and mechanisms enclosed in metallic or nonmetallic cases@ or that are enclosed when mounted in an enclosed switchboard@ panelboard@ or the like d. Manually operable by means of external handlesNote??These devices may also be automatically operable by means of shunt trips@ electrical operators@ ground fault devices@ or other mechanisms.This standards publication does not cover:a. The common form of snap switchesb. Switching devices having features intended primarily for the starting and running protection of electric motors as described in NEMA Standards Publications ICS 1@ ICS 2@ and ICS 3c. Circuit-breaker-type power circuit protectorsd. Molded case switches as described in NEMA Standards Publication AB 1Fuses@ lampholders@ receptacles@ wire connectors@ wires and cables@ etc.@ which may be provided as parts of an enclosed switch@ are covered under other NEMA standards publications.
NEMA KS 1-2001 history
2013NEMA KS 1-2013 Heavy Duty Enclosed and Dead-Front Switches (600 Volts Maximum)
2001NEMA KS 1-2001 Enclosed and Miscellaneous Distribution Equipment Switches (600 Volts Maximum)
1996NEMA KS 1-1996 Enclosed and Miscellaneous Distribution Equipment Switches (600 Volts Maximum)
1990NEMA KS 1-1990 Enclosed and Miscellaneous Distribution Equipment Switches (600 Volts Maximum)
1983NEMA KS 1-1983 ENCLOSED SWITCHES; REVISION 1 - JUNE 1985