Limited approach boundary
Updated 2026-10-27
Data records
- Article 100 of NFPA 70E-2027 defines the limited approach boundary as an approach limit at a distance from an exposed energized electrical conductor or circuit part inside which a shock hazard exists.
- Table 130.4(E)(a) and Table 130.4(E)(b) of NFPA 70E-2027 give the limited approach boundary by nominal voltage range for ac and dc systems in two columns, one for an exposed movable conductor and one for an exposed fixed circuit part; crossing the boundary is one of the two triggers in clause 110.2(B) for establishing an electrically safe work condition, and clause 130.4(F) keeps unqualified persons outside it unless escorted.
Sources
- NFPA 70E-2027, Standard for Electrical Safety in the Workplace, 2027 edition, NFPA. Cited: clause Article 100; clause 130.4(E). 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.limited-approach-boundary.nfpa70e.definition) | |
| 2026-10-27 | created (gloss.limited-approach-boundary.nfpa70e.table-and-role) |
Cite this page
Cite the governing standard for the fact itself; cite this page as the finding aid.
"Limited approach boundary." Arc Flash Reference. 2026-10-27. https://www.arcflashreference.com/glossary/limited-approach-boundary/.
Arc Flash Reference, Limited approach boundary (Oct. 27, 2026), https://www.arcflashreference.com/glossary/limited-approach-boundary/.
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title = {Limited approach boundary},
howpublished = {\url{https://www.arcflashreference.com/glossary/limited-approach-boundary/}},
organization = {Arc Flash Reference},
publisher = {Arc Flash Reference},
year = {2026},
note = {last substantive change 2026-10-27}
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