NDLI: Purged & pressurized motors made to IEC / NEC / CEC Zone 1 (EX P) & to NEC/CEC Division 1 (type X): Are they the same?

Content Provider	IEEE Xplore Digital Library
Author	Mistry, B. Lawrence, W.G.
Copyright Year	2008
Description	Author affiliation: FM Approvals, Norwood, MA (Lawrence, W.G.) \|\| Gen. Electr. Canada, Peterborough, ON (Mistry, B.)
Abstract	Electric motors have been used in Zone 1 and Division 1 hazardous areas for many years. These motors operate in hazardous (classified) locations where an explosive gas or vapor atmosphere is likely to be present in a normal operation. Motors operating in this area require special protection against igniting the explosive gas or vapor. In order to operate these motors safely, special protection such as purged and pressurization or explosion proof enclosure is required. The large fabricated frame motors are typically protected by the purged and pressurized technique. Zone 1 or Division 1 hazardous (Classified) locations have been defined to be essentially the same in NFPA 70, National Electrical Code (NEC), C22.1, Canadian Electric Code (CEC) and International standards (IEC). The petroleum and chemical facility environments for IEC/NEC/CEC Zone 1 and NEC/CEC Division 1 are not different, yet the safety requirements and how the motors are used in these areas are addressed from competing vantage points. The codes and standards are transcending national barriers in an attempt to synchronize without sacrificing safety requirements, however, there are still diverging regulations. These diverging requirements are discussed below.
Starting Page	1
Ending Page	8
File Size	676407
Page Count	8
File Format	PDF
ISBN	9781424425204
ISSN	00903507
DOI	10.1109/PCICON.2008.4663998
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-09-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Atmosphere Explosives Standards Induction motors Synchronous motors Ignition IEC Zone 1 NEC Class I Division 1
Content Type	Text
Resource Type	Article
Subject	Fuel Technology Energy Engineering and Power Technology

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