702.7 Standby signs
What changed in 702.7
The standby source sign at the service now covers every building other than one- and two-family dwellings, not just commercial and industrial jobs. Homes keep their sign at the outdoor emergency disconnect.
Point by point
- The service sign is now required at every building other than a one- or two-family dwelling. The 2020 NEC® named only commercial and industrial installations.
The full lesson is in the Pro Version
Get the whole breakdown
- 3 more points on exactly what changed
- The 2020 rule next to the 2023 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®Revised
Standby system signs now go at the outdoor emergency disconnect on one- and two-family homes, matching the new 230.85 rule.
Open the 2020 page →2023 NEC®RevisedYou're here
The standby source sign at the service now covers every building other than one- and two-family dwellings, not just commercial and industrial jobs. Homes keep their sign at the outdoor emergency disconnect.
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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