Class II locations.
Class II locations. Class II locations are those that are hazardous because of the presence of combustible dust. Class II locations include the following:
(a) Class II, Division 1. A Class II, Division 1 location is a location:
(1) In which combustible dust is or may be in suspension in the air under normal operating conditions, in quantities sufficient to produce explosive or ignitible mixtures; or
(2) Where mechanical failure or abnormal operation of machinery or equipment might cause such explosive or ignitible mixtures to be produced, and might also provide a source of ignition through simultaneous failure of electric equipment, operation of protection devices, or from other causes, or
(3) In which combustible dusts of an electrically conductive nature may be present.