310.1 Conductor article scope
What changed in 310.1
Article 310 was rewritten for easier use and now covers only conductors rated 2,000 volts and less. Medium voltage conductors moved to the new Article 311.
Point by point
- Article 310 is now limited to conductors rated 2,000 volts or less. It covers types, markings, insulation, uses and ampacity.
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- 3 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
Article 310 was rewritten for easier use and now covers only conductors rated 2,000 volts and less. Medium voltage conductors moved to the new Article 311.
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.
More 2020 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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