HAZARDOUS AREA CLASSIFICATION (HAC)
Hazardous Area is defined as an area in which an explosive gas atmosphere is present, or likely to be present, in quantities such as to require special precautions for the construction, installation and use of electrical apparatus.
Hazardous areas are classified in zones based upon the frequency of the appearance and the duration of an explosive gas atmosphere.
The objective of area classification is the notional division of a plant into zones (namely - Zone 0, Zone I and Zone 2). An area classification established in this way provides a basis for the selection of electrical apparatus that is protected to a degree appropriate to the risk involved.
