KS 3-2010
Page ii
Foreword
This is the first edition of NEMA Standards Publication KS 3. To ensure that a meaningful publication was
developed, draft copies were sent to a number of individuals and organizations in the public sector having
an interest in or responsibility for the purchase, testing, application, use, and preventive maintenance of
these products. Their resulting comments and suggestions provided a vital user and general interest input
prior to final NEMA approval and resulted in a number of substantive changes to this publication. This
publication will be periodically reviewed by the Switches Voting Classification of NEMA for any revisions
necessary to keep it up to date with advancing technology. Proposed or recommended revisions should
be submitted to:
Vice President, Technical Services
National Electrical Manufacturers Association
1300 North 17th Street
Rosslyn, Virginia 22209
This Standards Publication was developed by the Switches Voting Classification of the National Electrical
Manufacturers Association. Approval of this standard does not necessarily imply that all voting
classification members voted for its approval or participated in its development. At the time it was
approved, the Switches Voting Classification had the following members:
ABB Control, Inc.—Wichita Falls, TX
Boltswitch, Inc.—Crystal Lake, IL
Cooper Bussmann—St. Louis, MO
Eaton Corporation—Pittsburgh, PA
GE Industrial Solutions—Plainville, CT
Hubbell Inc.—Bridgeport, CT
Mersen USA—Newburyport, MA
Siemens Industry, Inc.—Alpharetta, GA
Schneider Electric—Palatine, IL
© Copyright 2010 by the National Electrical Manufacturers Association.
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