445.6 Generator listing
What changed in 445.6
Stationary generators at 600 volts or less now need a listing; one-of-a-kind or custom units can be field labeled instead.
Point by point
- New section: stationary generators rated at 600 volts or less must be listed.
The full lesson is in the Pro Version
Get the whole breakdown
- 2 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®NewYou're here
Stationary generators at 600 volts or less now need a listing; one-of-a-kind or custom units can be field labeled instead.
2023 NEC®Revised
Every stationary generator now has to be listed, whatever its voltage. Before, the listing rule stopped at units rated 600 volts or below.
Open the 2023 page →2026 NEC®No change
This section did not change from 2023 to 2026.
More 2020 changes in Article 445
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