Explains the classification of a Div. 2 area and the choice, installation and maintenance of electrical equipment where safety in these areas can be achieved by depending on the improbability of the simultaneous occurrence of a flammable atmosphere and an ignition source. Precautions which may be necessary to take against the effects of static electricity are outside the scope of this Code. Covers definitions, considerations affecting choice, use and installation, work on site, periodical electrical tests and operational and maintenance factors.