Area Classifications - Flammable Gases, Vapors and Liquids

Posted Wednesday, January 2, 2002

CEC/NEC (North American) Area Classifications

Flammable gases, vapors or liquids


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This document is intended as a simplified guide through hazardous and extreme conditions as found in many industrial applications. For actual installations, use the NEC/CEC code book and IEC/CECELEC approvals and wiring codes as final authority on any installation. All design should be performed by licensed professional engineers and installation should be performed by competent licensed electrical contractors.

Class I

Class I (Gas and Vapors) Hazardous Substances

Class II

Class II (Explosive Dusts) Hazardous Substances

Class III

Euro: IEC/CENELEC Area Classifications