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The 2026 NEC removed which threshold from the arc flash marking rule in 110.16?

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  1. The 600 volt rating
  2. The 1,000 ampere rating
  3. The 3-phase requirement

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References

  1. EC&M: Top 25 Changes to the 2026 NEC ecmweb.com/national-electrical-code/article/55330438/top-25-changes-to-the-2026-national-electrical-code Checked 2026-10-10.
  2. EC&M: Key Changes to the '26 NEC www.ecmweb.com/neca-show-coverage/article/55404442/key-changes-to-the-26-nec Checked 2026-10-10.

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