Rules for hazardous (classified) locations can be found in Chapter 5 [Special Occupancies] of the National Electrical Code (NEC). What are these specific locations, and why is the word “classified” in ...
Article 503 is the third in the series of Class X Location Articles. These can be summarized as: Article 501, Class I Locations. Gases. Article 502, Class II Locations. Liquids. Article 503, Class III ...
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