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I I I I I I I I I I I I I I I I I I I through such special tests as directed by the Engineer, at the cost and expense of the CONTRACTOR, or shall be replaced by the CONTRACTOR at his own expense. D. All electrical panels, enclosures, raceways, conduits, wireways, boxes, cabinets, etc., shall be fabricated of metal. Nonmetallic substitutes are not acceptable. This does not apply to buried work. 2.02 RACEWAYS AND FITTINGS A. All conduit shall be Schedule 40 PVC. Burial depth as shown on the drawings. 2.03 CONDUCTORS A. Conductors shall be copper. Power circuits shall have 600 volt PVC insulation (Underwriters' approved Type THWN). Conductors shall be color coded in accordance with the NEC. 2.04 PANELBOARDS A. Rating 1. Panel board ratings shall be as shown on the Drawings. All panelboards shall be rated for the intended voltage. B. Standards 1. Panelboards shall be in accordance with the Underwriter Laboratories, Inc. "Standard for Panelboards" and "Standard for Cabinets and Boxes" and shall be so labeled where procedures exist. Panelboards shall also comply with NEMA Standard for Panel boards and the NEC. C. Construction (NEMA 4XSS) 1 . All interiors shall be completely factor assembled with circuit breakers, wire connectors, etc. All wire connectors, except screw terminals, shall be of the anti-turn solderless type and all shall be suitable for copper or aluminum wire of the sizes indicated. 2. Interiors shall be so designed that circuit breakers can be replaced without disturbing adjacent units and without removing the main bus connectors and shall be so designed that circuits may be changed without machining, drilling or tapping. 07/04 160501-6 03-4174