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SITE ELECTRICAL WORK, GENERAL REQUIREMENTS Section 16000 15-1207 outlets. In all cases where new wires are required, shown, or specified to be installed in existing conduits, if same cannot be installed, new conduits shall be provided therefore as directed. 3. Existing switchboards, motor control centers, bus duct, and panelboards which are required to be extended, altered or modified under the Work of this Division shall be provided with new sections, bus extensions, and all necessary hardware for a complete and operating system,. Maintain all testing agency certifications. 4. Attention is called to the fact that all new conduit, wiring, and apparatus shown or specified shall be connected to existing systems so as to function as complete units. 5. All conduits, electrical apparatus, and similar items, in place and not shown or specified to be reused or which will not be essential to functioning of various systems when Work is completed, shall be removed. No existing material shall be reinstalled or reused, unless shown or specified. Concealed conduits which are not shown or specified to be reused and become exposed due to construction changes shall be removed to nearest available accessible reused outlets. F. Protection: In performance of Work, protect existing facility and protect Work of other Sections as well as Work of this Section from damage. 3.2 PERFORMANCE: A. Excavation and Backfilling: 1. As specified in Earthwork Section. 2. Provide all necessary shoring, sheeting, pumping as part of Work of this Division. Excavate and backfill as required for installation of Electrical Work. 3. In asphalt or concrete paved areas, backfill only to subgrade level. 4. Support conduit for entire length on undisturbed original earth. Minimum conduit depth of pipe crown shall be two feet (2') below finished or natural grade. 5. !?estore all surfaces, rcad.rays, walks, curbs, walls, existing underground installations, and other construction or improvements damaged by installation of Electrical Work, to original condition in an acceptable manner. 6. Maintain all warning signs, barricades, flares, and lanterns as required. B. Concrete: 1. Concrete for conduit encasement shall be a mixture of approximately 50% sand and 50% rock, which will pass a 1 inch square screen, and four sacks of cement to the cubic yard of finished concrete. It shall be thoroughly consolidated. 2. Concrete used for encasement of electrical conduits shall contain red oxide in mix, five (5) pounds per cubic yard. 3. Concrete for other than concrete encasement shall be as specified in Division 3. C. Sleeves, Chases, and Concrete Inserts: 1. This Division shall provide, to cause no delay, all required sleeves, chases, concrete inserts, anchor bolts, and similar items before concrete is placed, and be responsible for correct location and installation of same. 2. Sleeves and chases are prohibited in structural members, except where shown or as otherwise wise approved ins writing. 12