690.7 PV maximum voltage
What changed in 690.7
Maximum voltage rules were cleaned up, and for DC-to-DC converters the manufacturer's instructions now come first.
Point by point
- Max circuit voltage is the largest calculated voltage from conductor to conductor, or from a conductor to grounded parts.
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- 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
Maximum voltage rules were cleaned up, and for DC-to-DC converters the manufacturer's instructions now come first.
2023 NEC®No change
This section did not change from 2020 to 2023.
2026 NEC®Revised
An engineered design can be used for smaller systems, and values can be rounded up for labels. Current calculations got the same change.
Open the 2026 page →More 2020 changes in Article 690
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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