NEMA KS 1-2013 PDF

Scope: This standards publication covers heavy duty enclosed and dead-front switches that are: a. Rated at not more than 600 volts and 4000 amperes with or without a horsepower rating. The dc ratings shall be up to and including 600 volts@ 1200 amperes. b. With or without provision for fuses c. 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 handles Note??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 switches b. 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 3 c. Circuit-breaker-type power circuit protectors d. Molded case switches as described in NEMA AB 1 e. General duty switches meeting the minimum requirements of UL 98 f. Fused power-circuit devices as described in UL 977 g. Pullout switches as described in UL 1429 Fuses@ 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 1-2013 history

2013 NEMA KS 1-2013 Heavy Duty Enclosed and Dead-Front Switches (600 Volts Maximum)
2001 NEMA KS 1-2001 Enclosed and Miscellaneous Distribution Equipment Switches (600 Volts Maximum)
1996 NEMA KS 1-1996 Enclosed and Miscellaneous Distribution Equipment Switches (600 Volts Maximum)
1990 NEMA KS 1-1990 Enclosed and Miscellaneous Distribution Equipment Switches (600 Volts Maximum)
1983 NEMA KS 1-1983 ENCLOSED SWITCHES; REVISION 1 - JUNE 1985