- 195 - SECTION 403 -- DIRECT BURIED WIRE AND CABLE
403.01 Description
1.The Contractor shall furnish and install direct buried wire and cable of the size and type shown in the contract. This includes the wire, cable, splices, connections, termina tions, identification tags, trenching, backfilling, compacting, and all labor, equipment, tools, materials, and incidentals required to complete the work.
2.The Contractor may be requir ed to pick up and install utility supplied preducted cable. The size and type of cable, together with the pick- up location, will be shown in the contract. Installation of the cable shall be according to guidelines issued by the utility.
403.02 Material Requirements
1.Direct buried cable and conductors for traffic signal and roadway lighting shall conform to the requiremen ts of Section 1073. Cable used as a "neutral" shall be designated white or gray. Insulated equipment ground shall be green.
403.03 Construction Methods
1.The Contractor shall install the size and type of direct buried wire, cable, and preducted cable as shown in the contract.
2.The Contractor shall not trench or place cable without the Engineer present. The Contractor shall give the Engineer 24 hour notice before trenching or placing cable.
3.Trenching: a. Direct buried wire, cable, and preducted cable shall not be plow-pulled into place.
b.Cable shall be placed a minimum of 30 inches (750 mm) below ground level.
c.The bottom of the trench shall be firm and level. Sharp objects shall not protrude from the walls or the bottom of the trench.
4.Placing Cable: a. The Contractor shall place the cables alongside the trench by moving the reel rather than pulling the cable from the reel and dragging the cable along the ground. Cables shall not be kinked or damaged during this operation.
b.The cables shall be lifted se ction by section and placed in the trench in such a manner as to prevent damage to the cables.
c.Cable shall be placed in trenches without dragging or stretching.
d.All trenches shall be backfilled as soon as practicable after placing the cable. The first lift of backfill material shall be a uniform thickness of approximately 6 inches (150 mm). Ca re shall be exercised in compacting the backfill to prevent damage to the ca ble. The backfill shall be free of any material which could damage the cable. The remainder of the backfill shall be compacted to match the adjacent soil stiffness so that the trench surface will remain level with the surrounding surfaces. Six-inch wide underground
403.03 Direct Buried Wire and Cable
- 196 - warning tape shall be installed above the cable at a depth of 12 inches below finished grade.
5.The cables shall be neatly trained to their destinations in cabinets, pole bases, pull boxes, and all other terminations.
6.The direction of each direct buried cable run shall be clearly identified with a stamped or embossed permanent plastic or non-ferrous metal tag at every point where the cable is accessible, such as in pull boxes, junction boxes, pole bases, transformer bases, and cabinets. A tag shall be attached to the conduit entrance bend whenever possible.
7.The minimum bending radii for cables or conductors less than 1 inch (25 mm) in diameter shall be 4 times the overall cable diameter. When using larger cables, the Co ntractor shall follow the ICEA recommended values. These limits do not apply to conduit bends.
8.Conduit bushings or bell ends shall be installed prior to installing cable whenever the conductor enters or leaves a section of conduit or conduit bend.
403.04 Method of Measurement
1.Direct buried wire, cable, and pr educted cable shall be measured in linear feet (meter) from center to center of pull boxes, poles, junction boxes, cabinets, and controllers for each type and size shown in the contract.
403.05 Basis of Payment
1.Pay Item Pay Unit 2/C _____ Detector Lead-in Cable, Linear Foot (LF) Direct Buried [Meter (m)] ___/C ____ Traffic Signal Cable, Linear Foot (LF) Direct Buried [Meter (m)] Service Cable, Direct Buried Linear Foot (LF) [Meter (m)] Direct Burial Cable, _____ Linear Foot (LF) Install Preducted Cable Linear Foot (LF) [Meter (m)]
2.Payment is full compensation for all work described in this Section. Underground warning tape shall be subsidiary to the cable. - 197 - SECTION 404 -- AERIAL CABLE
404.01 Description
1.The Contractor shall furnish and install aerial cable of the size and type shown in the contract. This work includes the cabl e, mounting devices, splices, connections, terminations, and all labor, equipment, tools, materials, and incidentals required to complete the work.
404.02 Material Requirements
1.Traffic signal and roadway lighting aerial cable and conductors shall conform to the requirements of Section 1073.
404.03 Construction Methods
1.The Contractor shall install the aerial cable in strict compliance with the latest industry standards, practices, and procedures.
404.04 Method of Measurement
1.Aerial cable shall be measured in linear feet (meter) horizontally from center to center of the poles for each type and size of cable shown in the contract and shall not include allowa nces for vertical rises, drip loops, sags, or splices.
404.05 Basis of Payment
1.Pay Item Pay Unit 2/C _____ Detector Lead-in Cable, Aerial Linear Foot (LF) [Meter (m)] ___/C ____ Traffic Signal Cable, Aerial Linear Foot (LF) [Meter (m)] Service Cable, _____ Aerial Linear Foot (LF) [Meter (m)] Street Lighting Cable, _____ Ae rial Linear Foot (LF) [Meter (m)] Coaxial Cable, Aerial Linear Foot (LF) [Meter (m)] Optical Detector Cable, Aerial Linear Foot (LF) [Meter (m)] Video Camera Cable, Aerial Linear Foot (LF) [Meter (m)] Traffic Signal Interconnect Cable, Linear Foot (LF) Type ____ Aerial [Meter (m)] ____ Communication Cable, Aerial Linear Foot (LF) [Meter (m)]
2.Payment is full compensation for all work described in this Section.
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 229–230 of 1,048.