Division 1
For Division 1, stated equivalent is Zone 1 (+ Zone 0); meaning is Explosive atmosphere likely during normal operation (10–1000 hrs/yr), verified against its source on 2026-08-11.
- Designation
- Division 1 verified
- Stated equivalent
- Zone 1 (+ Zone 0) verified
- Meaning
- Explosive atmosphere likely during normal operation (10–1000 hrs/yr) verified
What the source says
Division 1 | Zone 1 (+ Zone 0) | Explosive atmosphere likely during normal operation (10–1000 hrs/yr)
— exknowledge.com, retrieved 2026-08-11
Sources disagree
More than one authority states this, and they do not state the same thing. Both are reproduced with the source each came from — deciding between them is yours, not ours.
Stated equivalent
exknowledge.com says stated equivalent is Zone 1 (+ Zone 0), as of 2026-08-11.
Division 1 | Zone 1 (+ Zone 0) | Explosive atmosphere likely during normal operation (10–1000 hrs/yr)
https://exknowledge.com/pages/nec-500-vs-atex-iec.html
exknowledge.com says stated equivalent is Category 2, as of 2026-08-11.
Map existing equipment to ATEX categories (Division 1 equipment generally satisfies Category 2; Division 2 satisfies Category 3)
Source
- exknowledge.comhttps://exknowledge.com/pages/nec-500-vs-atex-iec.html