2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 800 TRAFFIC SECTION 809 — TRENCHING AND BACKFILLING
809.01 Description
Excavate trenches for the installation of underground conduit, wire, or duct cable for traffic control devices.
809.02 Materials
Backfill 950.05 Conduit Detection Tape 950.11
809.03 Construction
Excavate trenches as specified. In areas where conduit or cable is trenched, place a detector tape 6 in. below the finished grade. The tape shall be red and imprinted with a continuous warning message that reads "CAUTION: ELECTRICAL LINE BURIED BELOW", repeated every 36 in. The tape shall be inductively and conductively traceable using a standard pipe and cable locating device. Cable Treatment. Bed the duct cable and direct buried wires into the special backfill material as specified. Backfill. Backfill and compact the trench as specified in 801.03.05 and restore to its original condition. Replace topsoil, reseed, and resod, where directed.
809.04 Measurement and Payment
Trenching and backfilling will not be measured but the cost will be incidental to the Contract unit price for the installation of the pertinent Conduit, Wire, or Duct Cable. 810 — ELECTRICAL CABLE, WIRE, AND CONNECTORS CATEGORY 800 TRAFFIC SECTION 810 — ELECTRICAL CABLE, WIRE, AND CONNECTORS
810.01 Description
Furnish and install loop detector wires and leads, electrical cable, cable ducts, wire, micro-loop probe sets, communication cable, and associated connectors.
810.02 Materials
Sealer for Loop Detector 911.06 Conduit 950.10 Electrical Cable and Wire 950.06 Communication Cable 950.06.08 Cable and Wire Connectors 950.14 Micro-Loop Probe Refer to Contract Documents.
810.03 Construction
All conductors shall be copper. Unless specified, no cable splicing will be permitted. When specified, lighting cable splices and loop detector lead in cable splices will be permitted only in pull and junction boxes, manholes, and hand holes. Do not install cable until the entire related raceway, including manhole, hand hole, and foundation system is in place. Provide 6 ft of cable slack, neatly tied, coiled, and positioned in the bottom of manholes, hand holes, and cabinets. Provide 8 in. drip loops at all overhead entrance points into structures. Install insulated spade type terminal ends on all wiring placed on terminal blocks.
810.03.01 Direct Burial Cable. Install to the depth of cover specified. Install backfill as
specified in 801.03.05. 810.03.02 Cable in Conduits. Install by method in a manner to prevent harmful stretching of the conductor, injury to the insulation, or damage to the other protective covering. Seal the ends of all cables until ready for connection. When installing more than one wire or cable in a single duct or conduit, pull them into the conduit by hand or power winch with the use of cable grips or pulling eyes. Pulling tension shall be governed by recommended standard procedures for straight pulls or bends. Use a lubricant compatible with the cable insulation. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS