690.31 PV wiring methods
What changed in 690.31
PV wiring now needs more conductor identification, Type DG cable is allowed, listed PV hazard control systems get relief from metal wiring inside buildings, and roof arrays that aren't fastened down are addressed.
Point by point
- PV DC conductors must be identified at every termination, splice and connection point by color, marking tape, tags or another approved method.
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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
PV wiring now needs more conductor identification, Type DG cable is allowed, listed PV hazard control systems get relief from metal wiring inside buildings, and roof arrays that aren't fastened down are addressed.
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 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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