![]() ![]() Groups classify the exact type and nature of the hazardous substance. NEC Division Classification SystemĬlasses define the type of hazard in terms of whether it is a gas or vapour, a combustible or conductive dust or an ignitable fibre or flying.ĭivisions define the probability of the presence of the hazard being present during normal or abnormal conditions. ![]() The NEC Zone classification system was created to provide multinational companies with a system that could be harmonized with IEC classification system and therefore reduce the complexity of management. Specifically, Article 500 describes the NEC Division classification system, while Articles 505 and 506 describe the NEC Zone classification system. The principles of the NEC Division and Zone classification systems for hazardous locations are applied in countries around the globe. The National Electric Code (NEC) or NFPA 70 defines area classification and installation principles. National Electrical Code (NEC) Division and Zone Classification Systems ![]()
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