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Guide to the National Electrical Code by Thomas L. Harman

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Chapter 11Special Occupancies

Certain occupancies or locations because of their construction, use, or possible risk to safety of personnel, are termed special occupancies by the Code. Compliance with special rules is required for these locations to assure the safe installation of wiring and equipment.

An important group of special locations are called hazardous or classified locations. In these locations the possibility of fire or explosion exists because of the nature of the materials present. Normally, only certain areas of an industrial or commercial establishment are so classified where flammable vapors, combustible dust, or similar substances may be present in the air. This chapter discusses the various classifications and treats commercial ...

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