Wisconsin WisDOT Standard Specifications (within FDM) — Section 674

Effective with the December 2018 Letting 509 2019 Standard Spec ifications Section 674 Intelligent Transportation Systems - Cable

674.1Description

(1)This section describes providi ng, removing, and reinstalling ITS electrical wire and communications

cable.

674.2Materials

674.2.1 ITS Communication Cable

(1)Furnish communication cable conforming to IMSA 20-6. Use 6 pai rs of 18 AWG in each cable. Turn

individual pairs 12 turns pe r foot within the cable.

(2)Furnish ITS communication cable and terminations conforming to Rural Electrification Administration

(REA)specification PE-22. Use 6- pair, 12-pair, or 25-pair comm unications cable 19 AWG solid copper

with color-coded polyethylene insulation, black polyethylene ou ter jacket, and aluminum tape shield between jackets required to conne ct ramp meter and detector pro cessor assemblies. 674.2.2 Microwave Detector Cable

(1)Furnish 12 twisted pairs, 19 AW G, solid copper or color-coded polyethylene insulation, black

polyethylene outer jacket, aluminu m tape shield between jackets , and gel filled. The pair-utilization shall be as follows: Pair 1: power. Pair 7: detection zone contact closure. Pairs 2 and 3: RS-232 bus for l aptop computer. Pair 8: detection zone contact closure. Pair 4: detection zone contact closure. Pair 9: detection zone contact closure. Pair 5: detection zone contact closure. Pairs 10 through 12: sp are. Pair 6: detection zone contact closure.

674.3Construction

674.3.1 ITS Communication Cable

(1)Under the Cable ITS Communication bid items, install 6 pair, 1 2 pair, and 25 pair copper

communication cable as the plans show.

(2)Install, terminate, and test tw isted pair copper communications cable in the processo r cabinets in order

to transmit and share data communications between cabinets.

(3)Prevent copper communication ca ble from damage during installation and storage. Do not step on or

run over by any vehicle or equipm ent. Do not pull along the gro und, or over or around obstructions.

(4)Seal copper communication cable ends during installation using a heat shrinkable end cap. Do not use

tape. Keep sealed until termination. For cable not immediately terminated, provide a 4-foot length of cable extending out of t he cabinet opening.

(5)Use cable grip to pull cable th rough conduit designed to provi de a firm hold on exterior covering of

cable.

(6)Do not pull copper communication cable through any intermediat e junction box, pull box, or any other

opening in conduit or du ct, unless the engi neer approves. Pull the necessary length to be installed from the pull box or cabinet to the immediate next downstream p ull box or cabinet. C arefully store remaining length of copper communication cable to prevent damag e and in a manner not hazardous to pedestrian or vehicular traffic. Cable shall enter a pull box or cabinet directly from the cable reel or storage directly out of the immediate downstream pull box or ca binet.

(7)Install copper communication cable without splices between hub or processor assembly cabinets.

(8)Do not exceed the minimum bending radius at anytime during ins tallation. Do not pull over edges or

corners, over or around obstructions, or through unnecessary cu rves or bends. Copper communication cable shall be looped in and out of cabinets and pull boxes to provide adequate slack and minimize stress on conductors.

(9)Use manufacturer’s recommended pulling tension for pulling copper communication cable by the outer

jacket or 80 percent of the manufacturer's maximum pulling tension whichever is smaller.

(10)Use engineer-approved lubricant at manufacturer's recommended quantity to facilitate pulling cable.

Lubricate as it is fed off of the ca ble reel or st orage stack i nto the cable feeder. Place lubricator funnel around the cable just ahead of the feeder. After installation, clean the copper communication cable with a cloth at a pull box o r cabinet before leaving.

(11)Unless the plans show otherwis e, provide slack in the cable of one full turn in box for pull boxes and a

minimum of 6 feet for cabinets.

Effective with the December 2018 Letting 510 2019 Standard Spec ifications (12) Terminate cable pairs entering a cabinet on termination blocks located in cabinets in a neat and orderly fashion and according to the REA color code. Ground cable shield for each run at only one of the termination locations. Attach 8 AWG grounding wire to the s hield with an engi neer-approved clamp according to REA PC-2.

(13)Test the copper communication cable following installation:

- Use a megger to test the ground resistance of all conductors including the shield, and conductor-to- conductor, including all indivi dual conductors to the shield. E nsure that conductor tests, including the shield, read greater than 500 mega ohms to ground, and from con ductor to conductor and all individual conductors to the shield, read greater than 500 mega ohms. Repl ace cable with one or more failing tests. - Test continuity of each pair to show a resistance of not more than 8 ohms per 1000 feet of conductor. Use meter with a minimum input resistance measurement of 20,000 ohms per volt. 674.3.2 Microwave Detector Cable

(1)Install and test cables and conn ectors required to connect the microwave detector assembly with the

processor assembly as the plans show.

(2)Prevent cable from damage during installation and storage. Do not step on or run over by any vehicle

or equipment. Do not pull along t he ground, or ov er or around o bstructions.

(3)Seal cable ends at all times during installation using a heat shrinkable end cap. Do not use tape. Keep

sealed until connectors are installed.

(4)Install cable without splices between microwave detectors and processor.

(5)Provide slack in the cable as the plans show. Provide a minimu m of 6 feet for cabinets.

(6)Test the cable following installation as follows:

- Use a megger to test the grou nd resistance of conductors incl uding the shield, and conductor-to- conductor, including all indivi dual conductors to the shield. E nsure that all conductor tests, including the shield, read greater than 500 mega ohms to ground, and from con ductor to conductor and all individual conductors to the shield, read greater than 500 mega ohms. Repl ace cable with one or more failing tests. - Test continuity of each pair to show a resistance of not more than 8 ohms per 1000 feet of conductor. Use meter with a minimum input resistance measurement of 20,000 ohms per volt. 674.3.3 Removing Cable

(1)Remove the existing group of cables within a section of existi ng conduit as the plans show.

(2)Use caution not to damage any remaining cables from existing c onduits as the plans show. Remove

existing cable connections from the cabinet or remove splices.

(3)Test cable continuity, and ident ify and mark cables before removal to ensure proper reconnection.

(4)Demonstrate and document existing damage to engineer. Non-comp liance to demonstrate and

document existing damage shall ma ke repair the responsibility o f the contractor. 674.3.4 Reinstalling Cable

(1)Reinstall existing group of cables removed within a section of conduit as the plans show.

(2)Provide a liberal coating of an engineer-approved electrical varnish or sealant to allow flexible

protection from oil, moisture, and corrosion.

(3)Provide a pressure or compression fitting for electrical splices and connections from the department's

QPL.

(4)Replace damaged cables in kind at no additional expense to the department.

(5)Remake all cable connections.

674.4Measurement

(1)The department will measure the C able ITS Communication bid it ems by the linear foot acceptably

completed, measured along the c enterline of the conduit, including slack between terminations within the ramp meter processor assemblies.

(2)The department will measure Cable Microwave Detector by the li near foot acceptably completed,

measured along the centerline o f the conduit, including slack t o its connection with the proper terminals in the processor assembly cabinet.

(3)The department will measure Remove Cable by the linear foot acceptably completed, measured along

the centerline of the conduits rem oved between 2 points such as pull boxes, manholes, or other points defined.

(4)The department will measure Rein stall Cable by the linear foot acceptably completed, measured along

the centerline of the conduit run in which the group of cables was reinstalled.

Effective with the December 2018 Letting 511 2019 Standard Spec ifications 674.5 Payment

(1)The department will pay for measured quantities at the contrac t unit price under the following bid

items: ITEM NUMBER DESCRIPTION UNIT

674.0100 - 0199 Cable ITS Communication (pairs) LF

674.0200 Cable Microwave Detector LF

674.0300 Remove Cable LF

674.0400 Reinstall Cable LF

(2)Payment for the Cable ITS Comm unication bid items is full comp ensation for providing cables; for

making connections and testing installed cable system; and for disposing of surplus material.

(3)Payment for Cable Microwave Detector is full compensation for providing cable and connectors; for

making necessary connections; and for testing.

(4)Payment for Remove Cable is full compensation for removing exi sting cables; for undoing connections

and terminations, including wire nuts, splice kits, tape, insul ating varnish or sealant, and ground lug fasteners; and for testing.

(5)Payment for Reinstall Cable is full compensation for reinstalling existing cables; for remaking

connections, including wire nuts, splice kits, tape, insulating varnish or sealant, and ground lug fasteners; and for testing.

(6)The department will not pay for r eplacing cable not attaining a required resistance greater than 500

mega ohms.

Effective with the December 2018 Letting 512 2019 Standard Spec ifications Section 675 Controllers and Detectors

675.1Description

(1)This section describes installi ng department-furnished control lers for ramp meters, detector processor

assemblies, and microwave detectors.

675.2Materials

(1)The department will furnish controllers as specified in the co ntract special provisions.

675.3Construction

(1)Perform a series resistance test and resistance to ground test at each loop/lead-in circuit before

starting any work as specified in 670.

(2)For new loop/lead-in circuits, perform a series resistance test and resistance to ground test. Ensure

that the series resistance of each circuit is less than 5 ohms. Ensure that the insulation resistance of loop conductors to ground, and between adjacent loops/lead-in c ircuit is greater than 500 mega ohms as measured with a 500 volt megger test meter.

(3)If any work proceeds at a location without completion of the l oop detector testing, assume

responsibility for the ultimate correct operati on of the loop/lead-in.

(4)Secure ramp meter processor a ssembly cabinets on new, modified , or existing concrete bases at

locations the plans show. Provide bolted stainless steel connections with lock washers, locking nuts, or other engineer-approved means to prevent the connection nuts from backing off. Isolate dissimilar materials from one another by stainless steel fittings.

(5)Make power connections to the processor assembly cabinet as sp ecified in 656.

(6)Make detector cable and communications cable connections to th e processor assembly cabinet to

provide the required operation.

(7)Make traffic signal cable connections and electrical wire conn ections to the processor assembly

cabinet as specified in 658.

(8)Terminate signal current carrying neutral conductors on a neut ral strip mounted in the cabinet. Isolate

the neutral bus from the cabinet and equipment ground. Terminat e the neutral bus at the neutral lug ultimately attached in the meter pedestal.

(9)Ground all cable grounding shields and any spare or unused con ductors in the ramp meter processor

assembly cabinet to the equipment-grounding terminal strip.

(10)Isolate the equipment-grounding strip from the cabinet and cur rent carrying neutral. Terminate the

cabinet current carrying neutra l at the current carrying neutra l ground lug in the meter pedestal or breaker disconnect box.

(11)Reuse existing wiring to the ex isting, modified, or new concre te control cabinet base unless the

engineer directs otherwise. Wiring includes bonding wire, condu ctors and loop detector lead-in cable, and loop detector wire.

(12)Make connections among the processor assembly, multipoint device interface units, and telephone

interface modems at locations the plans show.

(13)The department will provide proc essor assembly firmware. The department will install the processor

firmware on contractor-supplied EPROM's. Pick up the EPROM's with firmware from the department, and install it into each controller before installation.

(14)Upon completing installation wor k at a location, before detector verification and conducting the testing

procedure, perform the new loop/ lead-in circuit series resistance test and resistance to ground test. Ensure that the series resistance of each circuit is less than 5 ohms. Ensure that the insulation resistance of loop conductors to ground, and between adjacent l oop/lead-in circui t, is greater than 500 mega ohms as measured with a 500 volt megger test meter. Docume nt the test results, and submit them to the engineer as part of t he set up to begin the testing procedure.

(15)Demonstrate the functionality and accuracy of the vehicle dete ctors connected to each location. Verify

that the traffic flow information obtained from each detector i s within +/- 5 percent of each of two 10- minute manual data periods.

(16)After installing the processor assembly; insta lling other ramp control signal assembly hardware,

detection hardware, communications hardware, power supply, and connecting cabling; and successfully completing, docum enting and presenting, to the eng ineer, testing and verification, the field system integrator, followi ng the contractor-submitted and engineer-approved te sting procedure, shall successfully conducted a fi eld test for each processor as sembly. The test is designed to demonstrate that hardware, cable, and connections furnished and installed by the contractor operates

Source: Wisconsin Standard Specifications for Highway and Structure Construction, 2019 Edition. Pages 518–520 of 601.

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673 Communication Vaults

675 Controllers and Detectors