445.18 Generator disconnect and shutdown
What changed in 445.18
Standby generators at one- and two-family dwellings now need an outdoor, readily accessible emergency shutdown device.
Point by point
- New 445.18(D): generators at one- and two-family dwellings need an emergency shutdown device outside the home.
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- 2 more points on exactly what changed
- The 2017 rule next to the 2020 rule, side by side
- Why it changed
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This section across NEC® editions
2020 NEC®RevisedYou're here
Standby generators at one- and two-family dwellings now need an outdoor, readily accessible emergency shutdown device.
2023 NEC®Revised
Generator disconnect rules were clarified, including disconnects mounted inside the generator and those for paralleled generators.
Open the 2023 page →2026 NEC®No change
This section did not change from 2023 to 2026.
More 2020 changes in Article 445
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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