230.67 Surge protection
What changed in 230.67
Every service supplying a dwelling unit now needs a surge protective device, Type 1 or Type 2, including when service equipment is replaced.
Point by point
- Every service that feeds a dwelling unit now needs an SPD (surge-protective device).
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- 4 more points on exactly what changed
- The 2017 rule next to the 2020 rule, side by side
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This section across NEC® editions
2020 NEC®NewYou're here
Every service supplying a dwelling unit now needs a surge protective device, Type 1 or Type 2, including when service equipment is replaced.
2023 NEC®Revised
Service surge protection now covers dorm units, hotel and motel guest rooms, and nursing home patient sleeping rooms, not just dwelling units. Replacement and rating rules were added too.
Open the 2023 page →2026 NEC®Revised
Sleeping quarters in fire, police, EMS and similar stations, plus guest rooms in dormitories, were added to the places that need surge protection.
Open the 2026 page →More 2020 changes in Article 230
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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