Electric Cable Art. 873.03
872.05 Basis of Payment. This work will be paid for at the contract unit price
per foot (meter) for SPAN WIRE or TETHER WIRE. Any additional span wire or tether wire required for sag and wrap around shall be included in the cost of the wire specified. SECTION 873. ELECTRIC CABLE
873.01 Description. This work shall consist of furnishing and installing an
electric cable of the type, size, and number of conductors specified.
873.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Electric Cable – Signal, Lead-in, Communication, Service, and Equipment Grounding Conductor ............................................... 1076.04
b.Electrical Raceway Materials ............................................................. 1088.01 CONSTRUCTION REQUIREMENTS
873.03 Installation. The electric cable may be installed in a trench, in a
conduit, or aerially suspended, as indicated on the plans. When installed in a trench, the electric cable shall be installed at a depth of 24 to 30 in. (600 to 750 mm). The color coded conductor shall be connected according to the following schedule.
a.Signal Cable - Signal Head (5 Conductor or 7 Conductor) Conductor No. Base Color Tracer Color Connection 1 Black 2 White AC, Neutral 3 Red Red Circle Indication (AC,Line) 4 Green Green Circle Indication (AC,Line) 5 Orange Yellow Circle Indication (AC,Line) 6 Blue Yellow Arrow Indication (AC,Line) 7 White Black Green Arrow Indication (AC,Line)
b.Signal Cable - Pedestrian Signal Head Conductor No. Base Color Tracer Color Connection 1 Black 2 White AC, Neutral 3 Red Don't Walk (AC,Line) 4 Green Walk (AC,Line) Art. 873.03 Electric Cable
c.Signal Cable - Pedestrian Push-Button Conductor No. Base Color Tracer Color Connection 1 Black 24 V DC 2 White Cabinet Logic Ground
d.Lead-in Cable (Single-Pair) Conductor No. Color Connection 1 Black Loop Detector - Loop Signal 2 Non-Black Loop Detector - Loop Neutral
e.Communication Cable or Lead-in Cable (Multipair) Conductor No. (Each Pair) Color Connection 1 Black Signal 2 Non-Black Neutral/Logic Ground
f.Service Cable Conductor No. Color Connection 1 Black AC, Line 2 White AC, Neutral The length of extra cable shall be provided according to the following schedule. Location Length of Cable feet (meters) Gulfbox 1.5 0.5 Junction Box 1.5 0.5 Handhole 6.5 2.0 Double Handhole 13.0 4.0 Cable splices shall be made only at connections to detector loops or at the locations specified on the plans. When making a cable splice, the following procedures shall be used.
1.Remove all outer cable coverings, leaving 4 in. (100 mm) of insulated wire exposed.
2.Remove insulation for 1 in. (25 mm) and scrape copper conductors.
3.Connect conductors by twisting and soldering together. Electric Cable Art. 873.05
4.Wrap each conductor separately with rubber or vinyl electrical tape. The wrapping shall completely cover the twisted connection and the insulation 1 in. (25 mm) beyond all exposed copper wire on either end of the connection.
5.Scrape the cable sheath clean and place the cable in a rigid mold or a container. The mold or container shall be of a type acceptable to the Engineer.
6.Center all conductors in molds or containers.
7.Fill the mold or container with epoxy resin or polyurethane compound. The epoxy resin or polyurethane compound used shall be dielectric, waterproof, and approved by the Engineer. All stranded conductors shall be terminated in the cabinet using crimp-on connectors. Electric cables shall be pulled into conduit by training the cables at the entrance to the conduit to prevent twisting or overlapping. Detector lead-in cables shall be placed on top of signal cables. When three or more cables are pulled into a conduit, a fast-drying, water based lubricant recommended by the cable manufacturer shall be applied on the cables.
873.04 Grounding System. All traffic signal circuits shall include an
equipment grounding conductor according to Article 801.04. The equipment grounding conductor shall consist of a continuous, green, insulated conductor Type XLP, No. 6 AWG, stranded copper installed in raceways and bonded to each metal enclosure (handhole, post, mast arm pole, signal cabinet, etc.). All clamps shall be bronze or copper, and UL listed as ground connectors. A grounding cable with connectors shall be installed between each handhole cover and frame. The grounding cable shall be looped over cable hooks installed in the handholes and 5 ft (1.5 m) of extra cable shall be provided between the frame and cover. All equipment grounding conductors shall terminate at the ground bus in the controller cabinet. The neutral conductor and the equipment grounding conductor shall be connected in the service installation. At no other point in the traffic signal system shall the neutral and equipment grounding conductors be connected.
873.05 Method of Measurement. Electric cable will be measured for
payment in feet (meters) in place. The length of measurement shall be the distance horizontally and vertically measured between the changes in direction, including cables in mast arms, mast arm poles, signal posts, and extra cable length as specified in Article 873.03. The vertical cable length shall be measured according to the following schedule. Art. 873.05 Traffic Signal Post Location Cable Length Foundation (signal post, mast arm pole, controller cabinet) 3 ft (1 m) Mast Arm Pole (mast arm mounted signal head) 20 ft (6 m) Mast Arm Pole (bracket mounted signal head attached to mast arm pole) 13 ft (4 m) Signal Post (bracket or post mounted signal head) 13 ft (4 m) Pedestrian Push Button 6 ft (2 m)
873.06 Basis of Payment. This work will be paid for at the contract unit price
per foot (meter) for ELECTRIC CABLE, of the method of installation (IN TRENCH, IN CONDUIT, or AERIAL SUSPENDED), of the type, size, and number of conductors or pairs specified. The type specified will indicate the method of installation and whether the electric cable is Service, Signal, Lead-in, Communication, or Equipment Grounding Conductor. POSTS AND FOUNDATIONS SECTION 875. TRAFFIC SIGNAL POST
875.01 Description. This work shall consist of furnishing and installing a
metal traffic signal post.
875.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Traffic Signal Post .............................................................................. 1077.01 CONSTRUCTION REQUIREMENTS
875.03 Installation. The traffic signal post shall be erected plumb, securely
bolted to a concrete foundation, and grounded to a ground rod according to the details shown on the plans. No more than 3/4 in. (19 mm) of the post threads shall protrude above the base. The vertical clearance between the bottom of a bracket or post mounted signal head or pedestrian signal head and the crown of the pavement shall be between 8 and 15 ft (2.5 and 4.5 m). When the signal head is not mounted on the top of the post, a pipe cap shall be furnished and installed on the top of the post. The Contractor shall apply an anti- seize paste compound on all nuts and bolts prior to assembly. Prior to the assembly, the Contractor shall apply two additional coats of galvanized paint on the threads of the post and the base. The Contractor shall use a fabric post tightner to screw the post to the base.
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Source: Illinois Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 748–751 of 1,217. View official source ↗