NEC® Changes · 2020 NEC®

210.25 Multi-occupancy buildings

RevisedChanged in the 2020 NEC® (from the 2017 NEC®)· Updated October 24, 2026

What changed in 210.25

A new informational note lists examples of common areas, whose circuits can't be fed from a panel serving a single dwelling unit or tenant.

Point by point

  • A note now gives examples of common areas: hallways, lobbies, stairs, elevators, shared laundry rooms, roofs and mechanical rooms.

The full lesson is in the Pro Version

Get the whole breakdown

  • 2 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

A new informational note lists examples of common areas, whose circuits can't be fed from a panel serving a single dwelling unit or tenant.

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 210

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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