NEC® Changes · 2020 NEC®

705.10 Power source identification

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

What changed in 705.10

The power source plaque now has to show where each source's disconnect is, go at the service or another approved visible spot, and be grouped with other system signs.

Point by point

  • A permanent plaque or directory goes at each service equipment location, or at another approved spot that's readily visible.

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Get the whole breakdown

  • 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

The power source plaque now has to show where each source's disconnect is, go at the service or another approved visible spot, and be grouped with other system signs.

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 705

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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