1、NEMA Standards PublicationNational Electrical Manufacturers AssociationAANSI/NEMA C12.4-1984 (R2011)Registers Mechanical DemandANSI C12.4-1984 (R2002, R2011) American National Standard Registers Mechanical Demand Secretariat: National Electrical Manufacturers Association Approved December 14, 1984 A
2、merican National Standards Institute, Inc. NOTICE AND DISCLAIMER The information in this publication was considered technically sound by the consensus of persons engaged in the development and approval of the document at the time it was developed. Consensus does not necessarily mean that there is un
3、animous agreement among every person participating in the development of this document. ANSI standards and guidelines publications, of which the document contained herein is one, are developed through a voluntary consensus standards development process. This process brings together volunteers and/or
4、 seeks out the views of person who have interest in the topic covered by this publication. While NEMA administers the process to promote fairness in the development of consensus, it does not write the document and it does not independently test, evaluate, or verify the accuracy or completeness of an
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7、any of your particular purposes or needs. NEMA does not undertake to guarantee the performance of any individual manufacturer or sellers products or services by virtue of this standard or guide. In publishing and making this document available, NEMA is not undertaking to render professional or other
8、 services for or on behalf of any person or entity, nor is NEMA undertaking to perform any duty owed by any person or entity to someone else. Anyone using this document should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining t
9、he exercise of reasonable care in any given circumstances. Information and other standards on the topic covered by this publication may be available from other sources, which the user may wish to consult for additional views or information not covered by this publication. NEMA has no power, nor does
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11、nt shall not be attributable to NEMA and is solely the responsibility of the certifier or maker of the statement. ANSI/NEMA 12.4-1984 (R2002, R2011) Page i ANSI/NEMA 12.4-1984 (R2002, R2011) Page ii ANSI/NEMA 12.4-1984 (R2002, R2011) Page iii ANSI/NEMA 12.4-1984 (R2002, R2011) Page iv 1 1 1 1 1 2 2
12、2 2 2 2 2 2 2 4 4 4 4 4 4 4 4 4 4 4 4 666 5 6 34 6 ANSI/NEMA 12.4-1984 (R2002, R2011) Page v ANSI/NEMA 12.4-1984 (R2002, R2011) Page 1 ANSI/NEMA 12.4-1984 (R2002, R2011) Page 2 ANSI/NEMA 12.4-1984 (R2002, R2011) Page 3 ANSI/NEMA 12.4-1984 (R2002, R2011) Page 4 ANSI/NEMA 12.4-1984 (R2002, R2011) Page 5 ANSI/NEMA 12.4-1984 (R2002, R2011) Page 6 NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION 1300 NORTH 17TH STREET, SUITE 900 ROSSLYN. VA 22209www.NEMA.orgTO ORDER ADDITIONAL NEMA STANDARDS VISITWWW.GLOBAL.IHS.COM OR CALL 1-800-854-7179/1-303-397-79565612_0514TB
