Customer Service:
Mon - Fri: 8:30 am - 6 pm EST

 Historical

NFPA 496-2017

NFPA 496 Standard for Purged and Pressurized Enclosures for Electrical Equipment, 2017 edition

1.1 Scope. 1.1.1 This standard applies to purging and pressurizing for the following: (1) Electrical equipment located in areas classified as hazardous by Article 500 or Article 505 of NFPA 70 (2) Electrical equipment containing sources of flammable vapors or gases and located in either classified or unclassified areas (3) Control rooms or buildings located in areas classified as hazardous by Article 500 or Article 505 of NFPA 70 (4) Analyzer rooms containing sources of flammable vapors or gases and located in areas classified as hazardous by Article 500 or Article 505 of NFPA 70 1.1.2* This standard does not apply to electrical equipment located in: (1) Areas classified as Class I, Zone 0 (2) Areas classified as Class III (3) Areas where flammable liquids may be splashed or spilled on the electrical equipment 1.2 Purpose. This standard provides information on the methods for purging and pressurizing enclosures to prevent ignition of a flammable atmosphere. Such an atmosphere may be introduced into the enclosure by a surrounding external atmosphere or by an internal source. By these means, electrical equipment that is not otherwise acceptable for a flammable atmosphere may be utilized in accordance with Article 500 or Article 505 of NFPA 70 .


Content Provider
National Fire Protection Association [nfpa]


Others Also Bought

NFPA 385-2017
NFPA 385 Standard for Tank Vehicles for Flammable and Combustible Liquids, 2017 edition
NFPA 86-2019
NFPA 86 Standard for Ovens and Furnaces, 2019 edition
NFPA 55-2020
NFPA 55 Compressed Gases and Cryogenic Fluids Code, 2020 edition
ANSI Logo

As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.

CUSTOMER SERVICE
NEW YORK OFFICE
ANSI HEADQUARTERS