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C P-1 L� 1. Ducts shall be polyvinyl chloride (PVC Schedule 40) installed on clean fine sand. No rocks or debris shall be allowed as trench fill. 2. Cable racks, supports, pulling -in irons, and hardware shall be galvanized steel manufactured by Cope or approved equal, or provided as required. 3. Precast pullboxes shall be heavy duty type, designed for a Class H2O wheel load. Precast pullboxes shall be as manufactured by Brooks Products Co., or approved equal. 4. Handhole covers and frames shall be traffic rated, H2O class, provided as required and grounded to the system ground. ' B. Ducts shall be installed to drain away from panels; ducts between pullboxes shall drain toward the pullbox. Duct slopes shall not be less than 3 inches per 100 feet. C. Duct lines shall be laid in trenches on a clean backfill bedding. D. The minimum cover for duct lines shall be as specified. E. PVC duct terminations at pullboxes shall be with PVC and bells. F. Where bends in ducts are required, long radius elbows, sweeps and offsets shall be used. G. All ducts shall be rodded and a mandrel drawn through followed by a swab to lean out any obstructions which may cause cable abrasions. The mandrel shall be 12 inches in length and the diameter %2 -inch less than the inside diameter of the duct. H. Spare ducts shall be plugged and sealed watertight at all pullboxes. I. Ducts in use shall be sealed watertight at all pullboxes. Sealant shall be foam type. J. All joints shall be made so as to prevent the passage of concrete inside the conduit to form obstructions or cause cable abrasions. K. Pullbox covers in all areas shall finish 3- inches above crown of adjacent round elevation. L. A 5/8 -inch by 10 -foot copperclad ground rod shall be driven in the bottom of each pullbox. All bond wires and pullbox cover shall be bonded to the ground rod. 09/03 16050 -8 03- 4138.A -R