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ANSI/ISA 12.00.01-2013

Explosive atmospheres - Part 0: Equipment - General Requirements

This standard specifies the general requirements for construction, testing and marking of electrical equipment and Ex Components intended for use in explosive atmospheres. Explosive atmospheres are identified by the National Electrical Code, ANSI/NFPA 70 as hazardous (classified) locations and include the following specified locations: Class I, Zone 0; Class I, Zone 1; Class I, Zone 2; Zone 20; Zone 21; Zone 22. See 6.1 for the relationship of the Equipment Protection Level (EPL) to the zone area classification.

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The International Society of Automation [isa]

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