What is the difference between Class 1 Division 1 and Class 1 Division 2?
Class 1 Hazardous Locations refer to facilities which deal with flammable gases, vapors, and liquids. Division 2 specifies that these flammable materials are handled, processed, or used in the defined hazardous location, but are not normally present in concentrations high enough to be ignitable.
What is class I d1?
Class I, Division 1 classified locations. An area where ignitable concentrations of flammable gases, vapors or liquids can exist all of the time or some of the time under normal operating conditions. A Class I, Division 1 area encompasses the combination of Zone 0 and Zone 1 areas.
What is Article 500 of the NEC?
Article 500 of NFPA 70, National Electrical Code , establishes the basis for classifying locations where fire or explosion hazards can exist due to flammable gases, flammable liquid–produced vapors, combustible liquid–produced vapors, combustible dusts, or ignitible fibers/flyings.
What does Class I Division 2 mean?
Note to the definition of “Class I, Division 2:” This classification usually includes locations where volatile flammable liquids or flammable gases or vapors are used, but which would become hazardous only in case of an accident or of some unusual operating condition.
What is a Division 2 location for electrical conduit?
Electrical conduits and their associated enclosures separated from process fluids by a single seal or barrier are classed as a Division 2 location if the outside of the conduit and enclosures is a nonhazardous location. (3) Class I, Zone 0. A Class I, Zone 0 location is a location in which one of the following conditions exists:
What is a Class 2 Class 1 location?
(1) Class II, Division 1. A Class II, Division 1 location is a location: (i) In which combustible dust is or may be in suspension in the air under normal operating conditions, in quantities sufficient to produce explosive or ignitable mixtures; or
What is a Class 1 Division 2 enclosure?
So a Class 1 Division 2 Enclosure is an Enclosure that is used in facilities which deal with flammable gases, vapors, and liquid materials that are handled, processed, or used in the defined hazardous location, but are not normally present in concentrations high enough to be ignitable.