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four inches (24 ") of looped -wire slack at valves and snake wires in trench to allow for contraction of wires. Tie color -coded wires in bundles at ten - foot (10') intervals. The wire shall be laid in the trench prior to the installation of the pipe. The wire must be beneath and six inches (6 ") to the side of the mainline pipe. B. All underground wire splices shall be made at electric valves in valve boxes, using 3M DBY connectors per manufacturer's instructions. C. All wire passing under existing or future paving or construction shall be encased in Schedule 40, PVC conduit extending at least twelve inches (12 ") beyond edges of paving and stabilized for construction. Any wire in plant beds shall be placed in three - fourths inch (3/4 "), Class 160, PVC thirty six -inch (36 ") minimum burial. Installation procedures shall conform to all local codes. D. Electrical connections to electrical control devices shall be made with 3M DBY connectors, or equal. E. All electrical installation shall comply with all applicable building code electrical requirements and standards. 3.06 VALVE AND VALVE BOX INSTALLATION A. Gate Valves: The IC shall install as located and detailed on the drawings. B. Quick - Coupling Valves: Shall be installed on mainline pipe in areas shown on the drawings. The connection between the mainline and quick - coupler valve shall be with a threaded Schedule 80, PVC pipe and a triple - swing joint. C. Electric - Control Valves: Shall be installed in specified valve boxes at the depth specified on the drawings. The valve box shall have six -inch (6 ") layer of three - fourths -inch (3/4 ") pea gravel installed below the bottom of the valve. The valve shall be connected to the mainline with Schedule 80, PVC extensions as necessary to ensure valve is properly positioned in the valve box as shown in the details. Electric - control valves shall be installed where shown and grouped together where practical. The IC shall place no closer than three feet (3') from edges of sidewalks walk edges, buildings and walls, and no closer than seven feet (7') from the back -of -curb along roadways or centerlines of swales. The IC shall adjust the valve to provide flow rate or rated - operating pressure required for each sprinkler circuit. I. In the event that the valve box does not extend to the base of the electric - control valve because of specific field conditions or complications, as 07/06 02810 -19 05 -5564