547.5 Agricultural wiring methods
What changed in 547.5
Underground grounding conductors can be bare inside a listed cable, and agricultural buildings follow 210.8(B), with GFCI in four farm areas limited to 15- and 20-amp, 125-volt receptacles.
Point by point
- A separate equipment grounding conductor run underground must be insulated.
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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
Underground grounding conductors can be bare inside a listed cable, and agricultural buildings follow 210.8(B), with GFCI in four farm areas limited to 15- and 20-amp, 125-volt receptacles.
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.
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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