Class I (gas), II (dust), III (fibers)
What is the category for Class I (gas), II (dust), III (fibers)?
For Class I (gas), II (dust), III (fibers), category is system attribute; iec / atex designation is Zone 0, 1, 2 (gas); Zone 20, 21, 22 (dust); basis or note is Hazard basis, recorded from its source on 2026-08-06.
Hazard basis | Class I (gas), II (dust), III (fibers) | Zone 0, 1, 2 (gas only) | Zone 0, 1, 2 (gas); Zone 20, 21, 22 (dust)
— exknowledge.com, retrieved 2026-08-06
- Category
- system attribute our reading
- North American designation
- Class I (gas), II (dust), III (fibers) verified
- IEC / ATEX designation
- Zone 0, 1, 2 (gas); Zone 20, 21, 22 (dust) verified
- Basis or note
- Hazard basis verified
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
Source
- exknowledge.comhttps://exknowledge.com/pages/nec-500-vs-atex-iec.html