Technical summary -- classified locations

From terminology to temperature codes, and from explosion protection methods to ingress protection codes, we have assembled a comprehensive summary of technical issues pertaining to U.S., Canadian, European and international IECEx Scheme hazardous locations (explosive atmospheres).

Class I (flammable gases, vapors or liquids)

• Area classification
• Gas groups
• Temperature codes
• Protection methods and standards

Class II (combustible dusts)

• Area classification
• Dust groups
• Temperature codes
• Protection methods and standards

Class III (ignitable fibers and flyings)

• Area classification
• Groups
• Temperature codes
• Protection methods and standards

Marking comparison for Class I, II and III equipment

• USA and Canadian Division markings
• USA and Canadian Division-based Zone markings
• USA, Canadian, European and IECEx IEC-based Zone markings

Environmental ratings for enclosures

• NEMA Types
• IP (Ingress Protection) codes