Meaning of Hazard.
Anything which has the potential to cause:
Harm, ill health or injury to people
Damage to property, products or environment
Meaning of Hazardous Area
Area in which an explosive atmosphere is, or may be expected to be, present in quantities such as to require special precautions for the construction, installation & use of electrical apparatus ’
Meaning of Hazardous Area Classification
Method of analyzing and classifying the environment where explosive gas atmospheres may occur so as to facilitate the proper selection an installation of apparatus to be used safely in that environment