| Definition: | area in which an explosive atmosphere is present, or can be expected to be present, in quantities such that special precautions for the construction, installation and use of equipment are required Note 1 to entry: IEC 60079-10-1, Explosive atmospheres – Part 10-1: Classification of areas – Explosive gas atmospheres, gives a classification of hazardous areas containing explosive gas atmospheres (see IEV 426-03-03, IEV 426-03-04 and IEV 426-03-05). Note 2 to entry: IEC 60079-10-2, Explosive atmospheres – Part 10-2: Classification of areas – Explosive dust atmospheres, gives a classification of hazardous areas containing explosive dust atmospheres (see IEV 426-03-23, IEV 426-03-24, and IEV 426-03-25).
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