Groups A, B, C, D
What is the category for Groups A, B, C, D?
For Groups A, B, C, D, category is system attribute; iec / atex designation is Groups IIC, IIB, IIA; basis or note is Gas classification, recorded from its source on 2026-08-06.
Gas classification | Groups A, B, C, D | Groups IIC, IIB, IIA | Groups IIC, IIB, IIA
— exknowledge.com, retrieved 2026-08-06
- Category
- system attribute our reading
- North American designation
- Groups A, B, C, D verified
- IEC / ATEX designation
- Groups IIC, IIB, IIA verified
- Basis or note
- Gas 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