Normal operating condition
Updated 2026-10-27
Data records
- The first exception to clause 110.2(B) of NFPA 70E-2027 allows normal operation of equipment without an electrically safe work condition only when the equipment is in a normal operating condition, which requires all seven of the following: properly installed, properly maintained, rated for the available fault current, used in accordance with its listing, labeling and manufacturer's instructions, doors closed and secured, all covers in place and secured, and no evidence of impending failure.
- Table 130.5(C)(3) of NFPA 70E-2027 distinguishes operation of a circuit breaker, switch, contactor or starter in a normal operating condition from operation in an abnormal condition when it estimates the likelihood of an arc flash occurrence.
Sources
- NFPA 70E-2027, Standard for Electrical Safety in the Workplace, 2027 edition, NFPA. Cited: clause 110.2(B) Exception No. 1; clause Table 130.5(C)(3). Held as: Purchased single-user copy. Publisher page for NFPA 70E-2027
Obtaining the documents
- NFPA 70E-2027: available from the publisher
Changelog (2 entries)
| Date | Revision | Change |
|---|---|---|
| 2026-10-27 | created (gloss.normal-operating-condition.nfpa70e.definition) | |
| 2026-10-27 | created (gloss.normal-operating-condition.nfpa70e.likelihood) |
Cite this page
Cite the governing standard for the fact itself; cite this page as the finding aid.
"Normal operating condition." Arc Flash Reference. 2026-10-27. https://www.arcflashreference.com/glossary/normal-operating-condition/.
Arc Flash Reference, Normal operating condition (Oct. 27, 2026), https://www.arcflashreference.com/glossary/normal-operating-condition/.
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title = {Normal operating condition},
howpublished = {\url{https://www.arcflashreference.com/glossary/normal-operating-condition/}},
organization = {Arc Flash Reference},
publisher = {Arc Flash Reference},
year = {2026},
note = {last substantive change 2026-10-27}
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