Specifications include, but are not limited to: Install conduits, conduit fittings, hangers, expansion fittings, and accessories on as shown on the Plans and, unless otherwise specified, in accordance with the following: 1. Run conduit parallel to beams, trusses, supports, pier caps, and similar features in the most direct manner. 2. Install horizontal runs on a slight grade, without forming low spots, to ensure proper drainage. 3. Run conduits with smooth, easy bends. 4. Hold conduits in boxes with locknuts and provide bushings for protection of the conductors. Construct walls of trenches for cables to be essentially vertical. Unless otherwise specified, install underground cable as follows: 1. Excavate trenches for direct burial cable to a minimum depth of 24 inches plus the cable diameter as measured from finished subgrade. 2. In general, locate the trenches to avoid conflict with proposed guardrail, sign posts, and other features. 3. Protect direct burial cable, and preassembled cable in duct, in trenches by cushioning with sand or earth that passes a 1/4-inch screen. Place the cable, or preassembled cable in duct, and sand or earth in the trench so that a minimum 3-inch thickness of the cushion material will completely surround each cable.