310.10 Conductor uses
What changed in 310.10
Where the code lets a conductor be bare, it can now be bare or have any covering in direct sun, even one not rated sunlight resistant.
Point by point
- The direct-sunlight rule in 310.10(D) got a third option.
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- 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®Revised
The parallel conductor rules were reworded; the requirements themselves didn't change.
Open the 2023 page →2026 NEC®RevisedYou're here
Where the code lets a conductor be bare, it can now be bare or have any covering in direct sun, even one not rated sunlight resistant.
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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