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Description / Abstract:
This recommended practice is limited to auxiliary devices
associated with rotating electrical machines operating in Division
2 or Zone 2 areas, classified as Class I under the practice of NFPA
70-2005, National Electrical Code®
(NEC®),1,2 CSA C22.1-02,3 or Zone
2 areas classified under the practice of IEC 60079-
10-20024 and CENELEC EN 60079-10-1996.5 This
recommended practice is not an attempt to rewrite or otherwise
supersede applicable sections or clauses of these noted documents
or any other codes or ordinances. Rather, it is intended to serve
as a supplement to existing codes that in this area may not be
sufficiently specific to serve as a guide to good engineering
practice.
Purpose
The following information is intended to bring together a brief
description of basic electrical practices with regard to the
application and installation of auxiliary devices to rotating
electrical machines operating in Class I, Division 2 or Zone 2
locations using NFPA 70-2005, National Electrical Code, CSA
C22.1-02, or Zone 2 locations using IEC 60079-14-2002 and CENELEC
EN 60079-14-1997. It should be understood that this information is
only a recommended practice to promote consistent application of
such devices and must be used with sound engineering judgment.
1NFPA publications are available from Publications
Sales, National Fire Protection Association, 1 Batterymarch Park,
P.O. Box 9101, Quincy, MA 02269-9101, USA
(http://www.nfpa.org/).
2National Electric Code and NEC are both registered
trademarks of the National Fire Protection Association, Inc.
3CSA publications are available from the Canadian
Standards Association, 5060 Spectrum Way, Mississauga, Ontario L4W
5N6, Canada
(http://www.csa.ca/standards/).
4IEC publications are available from the IEC Central
Office, 3, rue de Varembé, P.O. Box 131, Switzerland
(http://www.iec.ch/).
5CENELEC publications are available from the Cenelec
CS Info Publications Department, Rue de Stassartstraat 35,
1050 Brussels (http://www.cenelec.org/).