The areas Zone 1 and 2 are defined by EN 60079-14 "EEx d" is type of protection flameproof, defined by EN 50014, and is suitable in Zone 1.
"EEx n" includes type of protection nA, nC, and nR, defined by EN 50021 and are suitable for Zone 2. Take a look at http://www.fmglobal.com/research_standard_testing/product_certification/s296 .html for an explanatory poster comparing US, EN, and IEC standards in this area. Bill Lawrence Senior Engineering Specialist, Hazardous Locations FM Approvals, an FMGlobal Enterprise 1151 Bos-Prov Tpke Norwood, MA 02062 781-255-4822 [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]]On Behalf Of Chris Maxwell Sent: Monday, July 29, 2002 10:52 AM To: EMC-PSTC Internet Forum Subject: Hazardous Area Designations/Certifications Hi all, I have been asked a question regarding the following: "use in a Zone 1 and Zone 2 classified area. This equipment shall be certified EEX d and EEx n by a relevant authority (e.g. BASEEFA, CENELEC etc.) and shall be suitable for Gas Group IIB and Temperature Class T3." Can anyone elaborate on the above information? What standard defines "Zone 1" or "Zone 2"? What standard defines "EEX d" and "EEX n"? What about "Gas Group IIB" and "Temperature Class T3?" Any clarification, elaboration, elucidation and/or explanation that the group members could provide would certainly be appreciated. Thanks, Chris Maxwell | Design Engineer - Optical Division email [email protected] | dir +1 315 266 5128 | fax +1 315 797 8024 NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA web www.nettest.com | tel +1 315 797 4449 | ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
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