10/10/2026
Zone and Division classifications both define hazardous locations, but they are not interchangeable systems. We have found that understanding the differences between NEC Class/Division and IECEx/ATEX Zone designations is essential for selecting compliant lighting in refineries, chemical plants, grain facilities, and other demanding environments. The wrong classification can lead to unsuitable equipment, inspection delays, and unnecessary project costs. This guide clarifies the terminology so engineers, facility managers, and contractors can make confident fixture decisions.
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