NEC 505

For NEC 505, market / system is US; meaning is NEC 505 (Zone-based) is accepted in the US and provides easier mapping from IEC zones, verified against its source on 2026-08-11.

Designation: NEC 505 verified
Market / system: US verified
Meaning: NEC 505 (Zone-based) is accepted in the US and provides easier mapping from IEC zones verified

Sourceexknowledge.com

Verified2026-08-11

Review by2027-08-11

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

What the source says

NEC 505 (Zone-based) is accepted in the US and provides easier mapping from IEC zones

— 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.