NEC® Changes · 2020 NEC®

314.23 Box supports

RevisedChanged in the 2020 NEC® (from the 2017 NEC®)· Updated October 24, 2026

What changed in 314.23

Conduit pendant stems longer than 18 inches now call for a listed swivel hanger, replacing the older wording about flexible fittings.

Point by point

  • Applies to boxes and luminaires hung from conduit stems, also called pendants.

The full lesson is in the Pro Version

Get the whole breakdown

  • 3 more points on exactly what changed
  • The 2017 rule next to the 2020 rule, side by side
  • Why it changed
  • What to do and check on the job

One membership unlocks every NEC® change lesson for 2020, 2023 and 2026, plus every video, quiz, flashcard and the Testing Center.

Checking your membership…

This section across NEC® editions

2020 NEC®RevisedYou're here

Conduit pendant stems longer than 18 inches now call for a listed swivel hanger, replacing the older wording about flexible fittings.

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®Revised

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).

Open the 2026 page →

More 2020 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.

NEC® and National Electrical Code® are registered trademarks of the National Fire Protection Association (NFPA). Electrical Exam Coach is not affiliated with or endorsed by NFPA.

Find it faster on test day

Get a code book that's already tabbed and highlighted.