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Arc flash (IEEE 1584-2018)

Explore incident energy and clearing-time inputs. Independent review is outstanding; not for certification or PPE selection.

Study implementation with separate nominal/reduced clearing times. Independent coefficient and validity-domain review remains outstanding. Not a certified assessment or PPE selection.

min 0.208 · max 15

min 0.2 · max 106

min 305 · max 10000

min 6.35 · max 254

Select electrode configuration.

Select enclosure type.

min 1 · max 10000

min 1 · max 10000

min 1 · max 10000

min 0.001 · max 10

Use the protective-device clearing time at the reduced arcing current; it may be longer.

Select grounding type.

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Results

Enter inputs above, then tap Calculate.

Method and assumptions

IEEE 1584-2018 study model with per-electrode Tables 1–5, VarCF (Table 2), enclosure CF (Table 7), voltage interpolation, and max(nominal, reduced) energy. Separate nominal and reduced-current clearing times are used. Study implementation pending independent domain validation; not a certified assessment or PPE selection.

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Check the stated method and limits against your installation. Results are calculation aids, not certification.

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Calculation model 2026-11-02.1