Zone 0

For Zone 0, market / system is NEC 500; meaning is The most hazardous environments (continuous explosive atmosphere) have no direct NEC 500 equivalent, verified against its source on 2026-08-11.

Designation: Zone 0 verified
Market / system: NEC 500 verified
Meaning: The most hazardous environments (continuous explosive atmosphere) have no direct NEC 500 equivalent verified

Sourceexknowledge.com

Verified2026-08-11

Review by2027-08-11

DatasetCertification marks and hazardous-area classifications: cross-market equivalences

What the source says

Zone 0 gap: The most hazardous environments (continuous explosive atmosphere) have no direct NEC 500 equivalent. NEC 505 and IEC both define Zone 0, requiring EPL "a" equipment.

— exknowledge.com, retrieved 2026-08-11

Source

exknowledge.comhttps://exknowledge.com/pages/nec-500-vs-atex-iec.html

Last verified against source: 2026-08-11. Due for re-check by 2027-08-11. This page as Markdown · OKF bundle · full dataset as JSON.