406.10 Terminations
What changed in 406.10
Device terminal rules now spell it out: aluminum only on CO/ALR devices, and push-in terminals only for 14 AWG solid copper on 15-amp or smaller circuits.
Point by point
- Devices marked CO/ALR can take aluminum, copper or copper-clad aluminum, sized as the manufacturer allows.
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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®No change
This section did not change from 2017 to 2020.
2023 NEC®No change
This section did not change from 2020 to 2023.
2026 NEC®RevisedYou're here
Device terminal rules now spell it out: aluminum only on CO/ALR devices, and push-in terminals only for 14 AWG solid copper on 15-amp or smaller circuits.
More 2026 changes in Article 406
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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