Art. 816.01 Unit Duct LIGHTING WIRE AND CABLE SECTION 816. UNIT DUCT
816.01 Description. This work shall consist of furnishing and installing
preassembled cable in coilable nonmetallic conduit (unit duct), complete with all splicing, identifications, and terminations.
816.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Unit Duct ............................................................................................ 1066.01
b.Coilable Nonmetallic Conduit ......................................................... 1088.01(c)
c.Conductors (Note 1) .......................................................................... 1066.02
d.Cable Insulation ................................................................................. 1066.03
e.Splicing and Termination of Electric Cable ........................................ 1066.06
f.Wiring Identification Markers ............................................................. 1066.07
g.Electrical Tape ................................................................................... 1066.08 Note 1. Copper conductors shall be used. CONSTRUCTION REQUIREMENTS
816.03 Installation. Unit duct shall be installed according to Article 810.04
and the following. Use of the word conduit in Article 810.04 shall be construed to mean unit duct. The unit duct shall be installed directly from the reels on which the unit duct was shipped, in continuous spans between terminal points. Splicing will only be permitted in pole handholes or junction boxes on bridge structures above grade. Where unit duct passes through handholes or pull boxes, the polyethylene duct shall be cut open and the continuous, uncut and unspliced conductors exposed and looped within the handhole or pull box. The ends of the polyethylene duct must be sealed with duct sealant and mounted in the handhole to prevent entrance of moisture or contaminants. When the unit duct is to be pulled, the pulling apparatus shall be attached to the duct and not to the cables. The pulling tension on the duct shall not exceed 550 lb (2.4 kN). Minimum bending radius for the installed unit duct assembly shall be no smaller than the manufacturer’s recommended radius. Bends shall be made so that the duct will not be damaged or kinked and the internal diameter of the duct will not be effectively reduced. There shall not be more than the equivalent of four quarter bends between pull points and no bend greater than 90 degrees. Cable in Raceway Art. 817.02 Immediately after placement, the cable ends shall be sealed to prevent entrance of moisture and contaminates, unless splicing or termination work is performed concurrently. Where plowed, the unit duct shall be laid in place and the duct shall not be pulled through the length of the cut behind a bullet-nose mandrel or similar apparatus. Plowing operations shall be non-injurious to the duct. Before final wire and cable connections are made, the Contractor shall demonstrate that all conductors within the unit duct are free to move. When placed in a raceway, lubricating compounds shall be used where necessary to ensure smooth installation.
816.04 Method of Measurement. The unit duct will be measured for
payment in feet (meters) in place. Measurements will be made in straight lines between changes in direction and to the center of equipment and boxes. 3 ft (1 m) of extra unit duct will be allowed when terminating at a controller, light pole, or handhole. 1 ft (300 mm) of extra unit duct will be allowed at pull boxes, junction boxes, and similar locations. The vertical distance of unit duct required for breakaway devices, barrier walls, concrete pedestals, etc., and the depth of any burial will be measured in feet (meters). Changes in direction shall assume perfect straight line runs, ignoring actual raceway sweeps.
816.05 Basis of Payment. This work will be paid for at the contract unit price
per foot (meter) installed for UNIT DUCT, 600V, of the number, size and type of conductors, and the size and type of duct specified. SECTION 817. CABLE IN RACEWAY
817.01 Description. This work shall consist of furnishing and installing
electric cables in raceways, complete with all splicing, identifications, and terminations.
817.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Conductors (Note 1) .......................................................................... 1066.02
b.Cable Insulation .................................................................................. 1066.03
c.Splicing and Termination of Electric Cable ........................................ 1066.06
d.Wiring Identification Markers ............................................................. 1066.07
e.Electrical Tape ................................................................................... 1066.08 Note 1. Copper conductors shall be used.
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Source: Illinois Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 713–714 of 1,217. View official source ↗