NFPA 70E 2024 arc-flash boundary incident-energy criterion; distinct from PPE selection
1.2 cal/cm²observed
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| Scope | The boundary criterion is 1.2 cal/cm². It is not a PPE-category assignment; incident-energy and category methods are alternatives for a given item. |
| As of | 2024 edition (issued 2023-04-23) |
| Source | NFPA, NFPA 70E Standard for Electrical Safety in the Workplace, 2024 edition (issued 2023-04-23, effective 2023-05-13), Article 100 definition of arc flash boundary and 130.5(E)(1); 130.5(F) lists the incident-energy and PPE-category methods as alternatives. · Article 100, printed p. 70E–10; 130.5(E)(1) and 130.5(F), printed p. 70E–29 (PDF pp. 13 and 32). |
| Review | checking…review by 2027-03-08 · standard cadence |
| Recorded changes | last 2026-09-16 · 3 revisions tracked |
| Claim id | incident-energy-that-defines-the-arc-flash |
Where the guide uses it
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