310.16 Ampacity table
What changed in 310.16
The table now covers 16 AWG for copper and 14 AWG for copper-clad aluminum, and plain XHWN was dropped from the 90°C column.
Point by point
- Copper at 16 AWG and copper-clad aluminum at 14 AWG now carry values in the table, matching the smaller minimum sizes in 310.5.
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Get the whole breakdown
- 2 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
The table now covers 16 AWG for copper and 14 AWG for copper-clad aluminum, and plain XHWN was dropped from the 90°C column.
More 2026 changes in Article 310
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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