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Outdoor installations shall comply with 110.26(E)(2)(a) through (E)(2)(c).
(a) Installation Requirements. Outdoor electrical equipment shall be the following:
  1. Installed in identified enclosures
  2. Protected from accidental contact by unauthorized personnel or by vehicular traffic
  3. Protected from accidental spillage or leakage from piping systems
(b) Work Space. The working clearance space shall include the zone described in 110.26(A). No architectural appurtenance or other equipment shall be located in this zone.
(c) Dedicated Equipment Space. The space equal to the width and depth of the equipment, and extending from grade to a height of 1.8 m (6 ft) above the equipment, shall be dedicated to the electrical installation. No piping or other equipment foreign to the electrical installation shall be located in this zone.
Exception: Structural overhangs or roof extensions shall be permitted in this zone.

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