The National Electrical Manufacturers Association (NEMA) published NEMA KS 1-2013
Heavy Duty Enclosed and Dead-Front Switches (600 Volts Maximum).
NEMA KS 1-2013 sets requirements for heavy duty-rated products which extend beyond traditional performance. This standard covers heavy duty enclosed and dead-front switches that are:
- 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;
- with or without provision for fuses;
- with current-carrying parts and mechanisms enclosed in metallic or nonmetallic cases, or that are enclosed when mounted in an enclosed switchboard, panelboard, or similar; and
- manually operable by means of external handles.
KS 1 may be downloaded at no cost or purchased in hardcopy for $118 on the NEMA website.
The National Electrical Manufacturers Association (NEMA) represents nearly 350 electrical equipment and medical imaging manufacturers at the forefront of electrical safety, reliability, and resilience, as well as efficiency and energy security. Our combined industries account for 360,000 American jobs in more than 7,000 facilities covering every state. Our industry produces $106 billion shipments of electrical equipment and medical imaging technologies per year with $36 billion exports.