ANSI/ISA-60079-0 (12.00.01)-2009 Explosive atmospheres - Part 0: Equipment - General Requirements

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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