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What working clearance do I need in front of a 480V panel?

For 480V equipment likely to need examination while energized:

  • Table 110.26(A)(1) requires 3½ ft of depth for Condition 2 (grounded surfaces opposite), 4 ft for Condition 3. NEC 2023 · p. 70
  • Width must be the greater of 30 in. or the equipment width, and doors must open 90 degrees. NEC 2023 · p. 71
  • Your state amendments don't modify 110.26 — the national table governs. State amendments · p. 12

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