314.23 Box supports
What changed in 314.23
One threaded raceway can now support more than a conduit body. Single-gang FS and FD boxes and explosionproof boxes were added to the single-raceway exceptions in 314.23(E) and (F).
Point by point
- The base rule stayed: raceway-supported enclosures max out at 100 cubic inches and need two or more wrenchtight conduits.
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- 3 more points on exactly what changed
- The 2023 rule next to the 2026 rule, side by side
- Why it changed
- What to do and check on the job
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This section across NEC® editions
2020 NEC®Revised
Conduit pendant stems longer than 18 inches now call for a listed swivel hanger, replacing the older wording about flexible fittings.
Open the 2020 page →2023 NEC®Revised
A box hung from a cord that has a threaded hub now needs a listed cord grip made for that kind of hub.
Open the 2023 page →2026 NEC®RevisedYou're here
One threaded raceway can now support more than a conduit body. Single-gang FS and FD boxes and explosionproof boxes were added to the single-raceway exceptions in 314.23(E) and (F).
More 2026 changes in Article 314
This is a plain-English summary, not the NEC®'s exact wording. Always check the full section in the NEC® edition your area has adopted, plus any local amendments.
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