Class II Groups E, F, G
What is the category for Class II Groups E, F, G?
For Class II Groups E, F, G, category is system attribute; iec / atex designation is Zone 20, 21, 22 (IIIA, IIIB, IIIC); basis or note is Dust classification, recorded from its source on 2026-08-06.
Dust classification | Class II Groups E, F, G | Not covered | Zone 20, 21, 22 (IIIA, IIIB, IIIC)
— exknowledge.com, retrieved 2026-08-06
- Category
- system attribute our reading
- North American designation
- Class II Groups E, F, G verified
- IEC / ATEX designation
- Zone 20, 21, 22 (IIIA, IIIB, IIIC) verified
- Basis or note
- Dust classification 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