This specification applies to padmounted outdoor distribution switchgear. Unit shall be designed for mounting on a concrete pad at ground level. The switchgear shall be in complete conformance with all applicable NEC, ANSI, IEEE, and NEMA standards in addition to ANSI C57.12.28, Padmounted Equipment Enclosure Integrity Standard.

  1. The switchgear components, dimensions and construction shall be as shown on the drawing.
  2. The unit shall be constructed on a free-standing galvanized frame designed per applicable standards to withstand the electrical and mechanical stresses.
  3. Frame lifting and grounding provisions shall be provided.
  4. The unit shall be completely assembled and tested at the factory.


  1. The switchgear shall be housed in a fiberglass outdoor, westherproof housing sized to cover the unit and additional future equipment.
  2. Fiberglass laminate shall be 3/16" nominal thickness except where local reinforcement is required.
  3. Fiberglass shall not support combustion and be self extingusihing.
  4. Enclosure exterior shall be gel-coated to .014 inch nominal thickness and be manufacturer's standard willow green color.
  5. Locking devise shall provide both a captive penta head bolt and padlocking provisions.
  6. All enclosure hardware shall be made of 304 stainless steel.
  7. Enclosure shall be removable without disturbing enclosed equipment.
  8. A stainless steel identification plate shall be affixed outside the enclosure which identifies the manufacturer; model number of the equipment; and date of manufacture.


  1. Stainless steel louvers shall be provided with stainless steel screen baffle for adequate air flow and heat dissipation as required for enclosed equipment.
  1. The assembled switchgear unit shall have the following production tests performed:
    A. Mechanical Inspection
    B. Continuity Test
    C. Dielectric Test
    D. Enclosure Alignment
  2. The switchgear shall meet or exceed all portions of the NEC, ANSI, IEEE, and NEMA standards applicable to the unit components.
  3. Certified test data for the structural standards of the finished laminate shall be made availble upon request.
  4. The enclosure shall meet or exceed ANSI C57.12.28, Padmounted Equipment Enclosure Integrity Standard.

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