CATEGORY 800 TRAFFIC SECTION 804 — GROUNDING
804.01 Description
Furnish and install grounding systems.
804.02 Materials
Ground Wire and Rods 950.06.04
804.03 Construction
The grounding system shall conform to the latest editions of the NEC and NESC. Grounding of overhead communication cable and messenger cable attached to a utility company owned pole shall also conform to the utility company’s requirements.
804.03.01 Equipment Grounding System. This system shall consist of the ground wire,
electrically continuous metallic conduit system, span wire, steel poles, grounding conductors, communications cable steel spans, ground rods, steel span wire back guying, steel span wire pole to pole guying, and steel span wire slack spans and terminations. Grounding for overhead communications cable shall be to all of the following when present: at the telephone and CATV cables support span wires, at the ground wire of a multigrounded system, at the neutral wire of a multigrounded system, and at the ground of a secondary circuit with approved span wire grounding clamps. Grounding to the overhead communication cable support span at utility company owned poles shall be with a vise type body clamp equipped with jaws having teeth to pierce the insulation, without stripping the jacket on the overhead communications cable span wire, and operated by a single hexagonal head bolt.
804.03.02 Grounding Conductors. Furnish and install grounding conductors of the size and type
specified. 804.03.03 Ground Rods. Install ground rods as specified. Measure the ground resistance of each rod before connecting the rod to the grounding conductor. If the measured resistance exceeds 25 ohms, exothermically weld a 10 ft extension rod to the top of the first rod and drive to its full depth. Measure the earth resistance again. If it still exceeds 25 ohms, contact the Engineer for instructions. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS Where rock is encountered and acceptable earth grounds cannot be accomplished by driving as described above, the Engineer may direct the use of a grounding grid. In a grounding grid, direct buried rods are exothermically welded end to end to bond lighting standards and structures in continuous series to some point where an acceptable earth ground can be obtained.
804.03.04 Continuity. Maintain continuity of the equipment grounding system throughout the
project. 804.03.05 Terminations. Connection to equipment grounding system shall be made with suitable lugs at all grounding bushings specified in Section 805, and at the ground lugs in lighting structure access holes or in a breakaway base. Make connections to ground rods as specified in the Contract Documents. Connections to neutral grounding systems shall be made with lugs as specified in Section 805. Overhead communication cable shall be made with connectors installed at the first attachment on a utility company owned pole in the following method: at the last attachment on the pole; at every fifth attachment between the first and last attachment on the pole; at each attachment where power, CATV, and telephone cables continue onto differing poles; at each attachment where power, CATV, and telephone cables converge onto the same pole; at attachments on poles equal to 1/4 mile or more; and at where more than one separate attachment or guy is on the same pole. Grounding connectors shall be installed to the overhead communications cable, to the telephone and CATV cables support span wires when present, to the ground wire of a multigrounded system, to the neutral wire of a multigrounded system, and to the ground of a secondary circuit. The ground wire between clamps shall be stapled every 12 in.
804.03.06 Testing. Section 820.
804.04 Measurement and Payment
Ground Rods will be measured and paid for at the Contract unit price per each 10 ft length. The payment will be full compensation for lugs and welding, excavation, backfill, and for all material, labor, equipment, tools, and incidentals necessary to complete the work. Ground wire will be measured and paid for as specified in 810.04.01. 805 — ELECTRICAL CONDUIT AND FITTINGS CATEGORY 800 TRAFFIC SECTION 805 — ELECTRICAL CONDUIT AND FITTINGS
805.01 Description
Furnish and install electrical conduit and fittings.
805.02 Materials
Portland Cement Concrete 902.10, Mix No. 6 Metallic Conduit and Fittings 921.07.01 Nonmetallic Conduit and Fittings 921.07.02 Flexible Conduit and Fittings 921.07.02 PVC Coated Metallic Conduit and Fittings 921.07.03
805.03 Construction
805.03.01 Bends. Unless otherwise specified, use manufactured bends or field bends to make
changes in direction. Maintain an 18 in. trade radius.
805.03.02 Connections. Make conduit runs with as few couplings as standard length will permit.
Rigid steel conduit connections shall be threaded. Paint field cut threads of galvanized conduit with approved galvanizing repair paint prior to assembly. Connect nonmetallic conduit using a solvent welding process. Use watertight cast ferrous compression type fittings for electrical metallic tubing (EMT).
805.03.03 Conduit Terminations. Use pull boxes or conduit bodies at conduit terminations.
Conduits terminating in cast iron junction boxes shall be threaded into hubs, with bonding screws furnished and installed on the interior of the box. Conduits terminating in junction boxes without hubs shall be secured with two lock nuts with an insulated grounding bushing installed. Conduits terminating at concrete foundations, manholes, or hand holes shall be secured as specified in the Contract Documents. Cap all ends of unused conduit.
805.03.04 Cleaning and Capping. Prior to installing conductors, remove all obstructions and
debris by pulling a mandrel type device through each conduit run and all fittings in the presence of the Engineer. Cap conduit ends by using a manufactured cap or plug. Prior to the installation of wiring, remove manufactured caps or plugs and install an insulated bonding bushing on galvanized rigid conduit; install bell end fittings on PVC conduit. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS