NFPA 496: Standard for Purged and Pressurized Enclosures for Electrical Equipment, 2008 Edition
|Item # 49608|
Protect electrical equipment in flammable atmospheres by following the protection techniques outlined in the 2008 NFPA 496.
NFPA 496: Purged and Pressurized Enclosures for Electrical Equipment contains requirements for the design and operation of purged and pressurized electrical equipment enclosures. This protection technique is used in Class I and Class II hazardous (classified) locations to reduce or prevent the presence of flammable materials within electrical equipment enclosures as specified by NFPA 70®: National Electrical Code®. NFPA 496 also includes chapters covering protection of analyzers and rooms housing analyzers as well as a chapter on pressurized control rooms.
Consistent with the 2008 NEC®, the 2008 NFPA 496 includes the following updates to help control fire hazards:
- A new requirement to mark purged and pressurized enclosures with an asphyxiation hazard warning where the protective gas is other than air
- Correlation with the NEC requirements on equipment temperature ratings
(Softbound, 22 pp., 2008)
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