400.12 Cord uses not permitted
What changed in 400.12
The prohibited-use rule now plainly covers power-supply cords and cord sets as well as flexible cords and cables, and a note about them moved here from 400.1.
Point by point
- The opening now names four products: flexible cords, flexible cables, power-supply cords and cord sets. Only 400.10 can make an exception.
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Get the whole breakdown
- 4 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
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This section across NEC® editions
2020 NEC®RevisedYou're here
The prohibited-use rule now plainly covers power-supply cords and cord sets as well as flexible cords and cables, and a note about them moved here from 400.1.
2023 NEC®No change
This section did not change from 2020 to 2023.
2026 NEC®No change
This section did not change from 2023 to 2026.
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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