Group B · gas group · IIC (partially IIB+H₂)
What is the basis or note for Group B · gas group · IIC (partially IIB+H₂)?
For Group B, category is gas group; iec / atex designation is IIC (partially IIB+H₂); basis or note is MESG <0.50 mm, recorded from its source on 2026-08-06.
B | IIC (partially IIB+H₂) | Hydrogen, butadiene | <0.50 mm
— exknowledge.com, retrieved 2026-08-06
- Category
- gas group our reading
- North American designation
- Group B verified
- IEC / ATEX designation
- IIC (partially IIB+H₂) verified
- Basis or note
- MESG <0.50 mm
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.
Where each value comes from
The value above is stated away from the sentence quoted with the answer, so the passage that states it is shown here too.
North American designation
Group B | IIC | Hydrogen, butadiene
— all from exknowledge.com, retrieved 2026-08-06
Sources
- exknowledge.comhttps://exknowledge.com/pages/nec-500-vs-atex-iec.html
- exknowledge.comhttps://exknowledge.com/pages/gas-groups.html