Zone Division per ATEX and NEC 500
Depending on the type of materials that occur, hazardous locations are not equally at risk. The frequency and duration of occurrence of one of these substances give rise to the different protective requirements for operating equipment.
According to CENELEC and IEC, hazardous locations in Europe are divided into six different danger zones. The higher the probability that a potentially explosive atmosphere occurs, the more rigorous the requirements on operating equipment to prevent, for example, origination of sparks or hot surfaces.