630-1 Description.
Furnish and install conduit for traffic control signals and devices, highway lighting, and other electrically powered or operated devices as shown in the Contract Documents .
630-2 Materials.
630-2.1 Conduit: Use materials that have been tested and listed by a Nationally
Recognized Testing Laboratory to the following industry standards: Schedule 40 and 80 Polyvinyl Chloride (PVC)1 ................... UL 651 Fiberglass Reinforced Epoxy2 ................................ ............. UL 2420 Intermediate Metal3 ................................ ............................. UL 1242 Rigid Galvanized Metal3,4 ................................ ......................... UL 6 Rigid Aluminum4 ................................ ................................ ... UL 6A PVC Coated Intermediate Metal4................... ASTM A135/A135M, .................. ASTM A513, ASTM A568/A568M, NEMA RN1-2005 Liquid Tight Flexible Metal ................................ .................. UL 360 High Density Polyethylene (HDPE) Standard Dimension Ratio (SDR) 9 -115 ................................ ....................... ASTM F2160 HDPE SDR 13.55 ................................ . ASTM F2160, NEMA TC-7 Schedule 40 and 80 HDPE ................................ ................. UL 651A
1.Use conduit with solvent weld slip-fit plastic couplings unless approved by the Engineer.
2.Use conduit having a minimum stiffness value of 250. Ensure that each section has a duct bell with an integral gasket on one end and a duct spigot on the other end.
3.Use conduit that is hot -dipped galvani zed with a minimum coating of 1.24 ounces per square foot on both the inside and outside of the conduit . The weight of the zinc coating shall be determined using ASTM A90.
4.Use conduit with both ends reamed and threaded.
5.Can be used with preassemb led cable and rope -in-conduit.
630-2.2 Locate Wire: Ensure that locate wire is a single copper conductor with a
minimum gauge of No. 12 AWG. Ensure locate wire is insulated using a 45 mil minimum thickness polyethylene sheath that is orange in color and m arked to identify the manufacturer and the conductor size.
630-2.3 Locate Wire Grounding Unit : Ensure that locate wires are attached to a wire
grounding unit ( WGU) dedicated to safely dissipat e high transient voltages or other foreign electrical surges induced into the designat ed system. Ensure the WGU conforms to the following:
1.Allows signals generated by locate system transmitters to pass through the protection system without going to ground .
2.The protection system automatic ally resets and passes locate system transmitter signals after the unit has been grounded to dissipate over -voltages.
3.Is intended for below or above grade applications. Ground the WGU to a driven rod within 10 feet of the system using a No. 6 AWG single conductor wire with green insulation. FY 2023-24 Return to Table of Contents Ensure that the WGU is enclosed for protection from environmental hazards and is accessible for the connection of portable locate system transmitters .
4.The WGU system meets the minimum standards listed in Table 630-1 for surge protection: Table 630-1 Minimum Standards for Surge Protection Surge Element 3-element maximum duty fail -safe gas tube . Rating 40,000 A surge capacity (single -cycle, 8 by 20 microsecond waveform) . Life Minimum 1,000 surges (1000 A to ground) . Fail-Safe Integral fail -shorted device . Insulation Resistance 1,000 megohm minimum at 100 volts of direct current (V DC). Clamp Voltage s a. Impulse at 100 volts per microsecond: Typically 500 volts.
b.Direct Current: 300 to 500 volts.
630-2.4 Warning Tape: Ensure that the buried cable warning tape is flexible, elastic
material 3 inches wide, 6 mil thick, intended for burial and use as an underground utility warning notice, and that the surface of the warning tape is coated and sealed to preven t deterioration caused by harsh soil elements. Ensure that the warning tape color follows the American Public Works Association color code for underground utilities and has the repeating message “CAUTION: FDOT CABLE BURIED BELOW ” or other wording approved by the Engineer, permanently printed on its surface. Ensure that the tape material and ink colors do not change when exposed to acids, alkalis, and other destructive chemical variances commonly found in Florida soils.
630-2.5 Route Markers : Route markers may be either a standard route marker (SRM)
type or an electronic route marker (ERM) type. Ensure the SRM is a rigid, tubular, driven post used for location and notification purposes only. Ensure the ERM is physically identical to the SRM, but als o includes a termination board to provide aboveground access to locate wire buried alongside conduit and cable runs. Ensure that each SRM is labe led and identified as an FDOT fiber optic cable marker unless otherwise shown in the Plans. The labels must include the Department’s logo, contact information for the local FDOT District, and a telephone number to call prior to any excavation in the area. Ensure that the identification information is permanently imprinted on the top fitting, and will not peel, fa de, or deteriorate.
630-2.5 1 Standard Route Marker (SRM): Ensure that SRM post s are white
with an orange top fitting cover with black or white lettering and graphics. Ensure that the SRM is a tubular configuration, and both the marker post and the top fitting are made from virgin Type 111 HDPE . Ensure that any fasteners used with the SRM are constructed of stainless steel . Ensure that al l SRMs have a minimum outside diameter of 3.5 inches with a minimum wall thickness of 0.125 inches. Ensure that the top fitting cover is a minimum of 1.5 feet long and has an outside diameter of 3.75 inches with a minimum wall thickness of 0.125 inches. Ensure that each SRM provides a tensile strength of 4,200 pounds per square inch as required in ASTM D638. Ensure that each SRM is manufactured for use in temperatures range of minus 30° to 165°F in accordance with NEMA TS 2. Ensure th e SRM can withstand an impact force of 70 pounds per foot at 32°F in accordance with ASTM D2444, before and after UV conditioning for 2,000 hours in FY 2023-24 Return to Table of Contents accordance with ASTM G154. Ensure that the control sample of any material tested maintains a minimum of 70 percent of its origi nal tensile strength. Ensure that SRM s installed at the minimum 2 foot depth can withstand at least one impact at 45 miles per hour by a vehicle weighing at least 3,500 pounds and that after impact, post returns to an upright position within 10 degrees of vertical alignment within 30 seconds from the time of impact.
630-2.5 2 Electronic Route Marker (ERM): Ensure ERMs meet the same
material and performance requirements as the SRMs with the following exceptions. Equip each ERM with a removabl e, top-fitting cover that is black with white lettering. Ensure that each ERM contains a terminal board equipped with locate wire and ground connectors. Ensure that the terminal board is made from corrosion -resistant materials and includes terminal faci lities labeled according to function and provides uniform sp acing between connection points.
630-3 Installation Requirements.
630-3.1 General: Install the conduit in accordance with NEC or National Electrical
Safety Code (NESC) requirements and the Standard Plan s. Consider the locations of conduit as shown in the Plans as approximate. Construct conduit runs as straight as possible and obtain the Engineer’s approval for all major deviations in conduit locations from those shown in the Plans. Include buried cable warning tape with all trenched conduit. Mark the location of the conduit system with route markers as shown in the Plans and approved by the Engineer. Ensure that all route markers used are new and consistent in appearance . For conduit installed by directional bore, install in accordance with Section 555. For conduit installed by jack and bore, install in accordance with Section 556. Use only intermediate galvanized metal conduit, rigid galvanized metal conduit, rigid aluminum conduit or PVC coated intermediate metal conduit for above -ground electrical power service installations and rigid galvanized metal conduit or rig id aluminum conduit for underground electrical power service installations . Meet the requirements of Section 562 for coating all field cut and threaded galvanized pipe. Use Schedule 80 PVC or fiberglass reinforced epoxy conduit in or on structural elements. For non-structural, above ground ITS communication and electrical conduit, use intermediate galvanized metal conduit, rigid galvanized metal conduit, or Schedule 80 PVC conduit. Use HDPE with an SDR number less than or equal to 13.5, Schedule 80 HDPE, Schedule 40 HDPE, Schedule 80 PVC, or Schedule 40 PVC for underground installations of electrical conduit in earth for ITS electrical applications. Use HDPE with an SDR number less than or equal to 11, Schedule 80 PVC or Schedule 40 PVC for undergrou nd installations in earth or concrete for ITS and traffic control signal applications, except, use only HDPE with an SDR number less than or equal to 11 for blown fiber optic cable installations on limited access facilities . Use HDPE with an SDR number l ess than or equal to 13.5, Schedule 80 PVC, or Schedule 40 PVC for underground installations of electrical conduit in earth for lighting applications and landscape irrigation applications. Use HDPE with an SDR number less than or equal to 13.5, Schedule 80 PVC, Schedule 40 PVC, or rigid galvanized metal for underground installations of electrical conduit in concrete for lighting applications. FY 2023-24 Return to Table of Contents Use HDPE with an SDR number less than or equal to 11 for directional bores or Schedule 80 PVC for open trenching and conduits serving toll site vehicle detection loop pull boxes. Use the following for all underground toll site applications except for conduits serving vehicle detection loop pull boxes:
1.Rigid steel conduit coated with PVC or a bituminous coating extending 6 inches above finished grade for conduits entering or leaving the ground. Use threaded end and paint all exposed exterior conduit.
2.Rigid galvanized steel elbows and bends for HDPE and PVC conduit raceways longer than 200 feet in length or 2 inches trade size and larger. Do not place more than the equivalent of three quarter bends or 270 degrees o f bends, including the termination bends, between the two points of termination in the conduit, without a pull box. Obtain the Engineer’s approval to use corrugated flexible conduits for short runs of 6 feet or less. When a conduit installation changes from underground to above -ground, make the change a minimum of 6 inches below finished grade. Install a No. 12 AWG pull wire or polypropylene cor d inside the full length of all conduits. Ensure that a minimum of 24 inches of pull wire/cord is accessible at each conduit termination. Ensure the conduit includes all required fittings and incidentals necessary to construct a complete installation. When earth backfill and tamping is required, place backfill material as per Section 120 in layers approximately 12 inches thick and tamp each layer to a density equal to or greater than the adjacent soil. When backfilling trenches in existing pavement, u se a flowable fill meeting the requirements of Section 121. Provide a standard clearance between underground control cable and electrical service cable or another parallel underground electrical service cable that meets NESC requirements. Prevent the i ngress of water, dirt, sand, and other foreign materials into the conduit prior to, during, and after construction. Seal the ends of conduit after wiring is complete with a moisture resistant sealant that is designed for this specific application.
630-3.1 1 Fiber Optic Cable Conduit: Install the conduit system so the fiber
optic cable maintains a minimum bend radius of 20 times the cable diameter. Use approved methods for connecting inner duct or conduit within or between plowed portions, trenched portions, and bored portions. Submit the conduit manufacturer’s coupling method and material to the Engineer for approval.
630-3.2 Conduit Sizes: Size the conduit to be used on all installations, unless otherwise
shown in the Contract Documents. Use conduit of sufficient size to allow the conductor to be installed without any damage and meeting NEC requirements. Use conduit that is at least 2 inches in diameter, with the following exceptions: For conduit protecting the ground wire on the side of a pole, use conduit that is at least 1/2 inch in diameter. For ITS applications where Contractor chooses to install fiber optic cable by blowing, use co nduit that is at least 1 -1/4 inch in diameter. For traffic control signal and device electrical service conduit, use the minimum conduit size required by the local maintaining agency and the electrical service provider. FY 2023-24 Return to Table of Contents
630-3.3 Conduit Joints: Make conduit joints using materials as specified by the
manufacturer. When conduit crosses an expansion joint of a structure and where shown in the Plans, install an expansion or expansion/deflection fitting as specified by the manufacturer . Certify that expansion/deflection fittings are rated to accommodate a minimum rotation of 30 degrees and that both the expansion and expansion/deflection fittings are rated to accommodate the anticipated longitudinal movement (minimum of 2 inches for expansion fittings and 0.7 inches for expansion/deflection fittings). Ensure that all installed joints are waterproof. As an exception to the threaded coupling for intermediate metal conduit, at locations where it is not possible to screw the threaded coupling properly, the Contractor may use a waterproof slip -joint coupling approved by the Engineer. Secure the joint and tighten threaded connections. Prior to insertion into the coupling, clean, prime and coat the ends of PVC conduit with solvent -type cement as specified by the manufacturer. For toll site conduit applications: Join lengths of smooth wall HDPE conduit using the Butt Fusion process or universal aluminum couplings. Use PVC to HDPE threaded transition couplings to join PVC conduit to HDPE conduit.
630-3.4 PVC Coating: Apply PVC coating to exposed metal surfaces of the conduit,
except for the threads, to attain a nominal thickness of 40 mils. Ensure that the coating is free of sags and drips. Attach the coupling to the conduit prior to the application of the coating for conduit of 1 inch diameter or less. Use a coupling with sleeve extensions on conduit larger than 1 inch. Ensure that the sleeve extensions on all threaded female openings have a length equal to the diameter of the conduit up to and including size number 53.
630-3.5 Conduit Terminations: Where conduit enters a box, fitting, or other enclosure,
provide a bushing or adapter (end bell, conduit adapter, etc.) to protect the conductor or cable from abrasion unless the box, fitting, or enclosure pro vides equivalent protection. For conduit to be encased in concrete, wrap with tape or otherwise protect all terminations to prevent the entrance of concrete. Connect new underground conduits to existing underground conduits with a pull box. Install conduit terminating in a concrete strain pole through the cable entry hole and up the center of the pole to a location approximately 6 inches below the handhole. Seal conduits terminating in a controller base, pole, pull box, junction box, or pedestal bas e with a moisture resistant sealant approved by the Engineer. For mast arm poles, high mast poles, and steel strain poles, terminate conduit at least 6 inches above the top of the foundation. For all other poles, controller bases, pedestal bases, and jun ction boxes, terminate conduit runs into the center of the base or box at least 2 inches above the surface of the base.
630-3.6 Restoration of Trench Areas: Restore the conduit trench construction area to an
acceptable condition. Such work includes repair or replacement of all pavement areas, sidewalks, driveways, curbs, structures, landscaping, grass areas (including removal of excavated materials and spoils), removal and disposal of drilling fluids, and backfilling areas disturbed by the conduit installation.
630-3.7 Above -Ground Installation: Use conduit designed and manufactured for use in
long-term above -ground applications with UV stabilization to prevent material deterioration. FY 2023-24 Return to Table of Contents Securely attach above -ground conduit installations to the surface of the supporting structure using conduit straps. As a minimum, use conduit straps located on 5 foot centers. Use galvanized metal conduit straps when installing intermediate galvanized metal conduit, fiberglass reinforced epoxy conduit, rigid galvanized conduit , rigid aluminum conduit or PVC coated intermediate metal conduit above ground. Use the same PVC coating for the metal straps as the conduit, when using PVC coated intermediate metal conduit.
630-3.8 Elbows: The radius of curvature of the centerline of any bend shall not be less
than shown below in Table 630-2: Table 630-2 Elbow Curvature Size Standard Radius 1/2 inch 4 inches 3/4 inch 4-1/2 inches 1 inch 5-1/2 inches 1-1/4 inches 7-1/4 inches 1-1/2 inches 8-1/4 inches 2 inches 9-1/2 inches 2-1/2 inches 10-1/2 inches 3 inches 13 inches 3-1/2 inches 15 inches 4 inches 16 inches 5 inches 24 inches 6 inches 30 inches
630-3.9 Fiber Optic Cable Locate Wire .
630-3.9 1 Fiber Optic Cable Locate Wire Installation : Install locate wire in the
trench or bore with all underground conduits to provide end -to-end electrical continuity for electronically locating the underground conduit system. When conduit is placed by trenching, bury locate wire along the centerline of t he top outer surface of installed conduit . Do not install locate wire in a conduit with fiber optic cable. Do not run locate wires into field cabinets. Terminate locate wires at the following locations or as shown on the Plans, nearest pull box to a fie ld cabinet, nearest pull box to a building, and splice box locations. Ensure that wire termination occurs in a pull box as shown in Standard Plans, Index 635-001. In a trenching operation, install the locate wire no more than 3 inches above the conduit. Ensure that the locate wire enters all pull and splice boxes, and that a minimum of 10 feet of slack locate wire is coiled and neatly stored in each box. In a boring operation, install the locate wire in an encasement , install the conduit detection wire external to the conduit with no separation between conduit and wire, or use conduit with integral locate wire. Locate wire may also be placed in the void between the inner wall of conduit and innerducts contained within the conduit as long as no other cabl es are present within the void . Make locate wire splices in a flush grade -level box. Ensure that locate wire splices are waterproof and suitable for direct burial. Ensure that locate wire splices at the pull FY 2023-24 Return to Table of Contents box meet NEC requirements. Ensure that locate wire splices are constructed of and in the following order: a mechanical crimp connection with a butt sleeve, an oxide -preventing aerosol lacquer, mastic electrical splicing tape, and standard electrical tape. At the completion of the installation, provide the Engineer with as -built drawings that document all splice locations. Install WGUs in pull boxes and splice boxes as shown in the Plans or directed by the Engineer. Mount the device in a location high enough from the bottom of the box to allow access to terminal facilities without disturbing cables present within the box . Terminate the locate wires and connect the WGU to ground in accordance with the manufacturer’s instructions.
630-3.9 2 Fiber Optic Cable Locate Wire Testing: Test the locate wire system
after installation to ensure that it functions and can be used to accurately locate the conduit system. Perform continuity tests and insulation resistance tests on all locate wires a nd provide the Engineer with all test results. Replace, or repair defective locate wire at no additional cost.
630-3.10 Route Markers: Install route markers for new fiber optic cable installations,
replace route markers as shown in the Plans, and ensure t he following:
1.Markers are plumb, level , and the notification information is clearly visible when viewed from the side facing the roadway.
2.Markers are set within the right of way.
3.Markers are p laced at a 1 foot offset from the conduit system.
4.The top of the marker post is a minimum of 5 feet and maximum of 6 feet above the finish grade
5.Markers are spaced a maximum of 500 feet apart.
6.A clear line of sight is m aintained from one marker to the next.
7.Markers are i nstalled on both sides of the road way at any crossing point where the conduit system changes to the opposite side of the road way.
8.Markers are installed a t the center point of any conduit run between two pull or splice boxes.
9.Markers are installed a t gate locat ions when the conduit system is adjacent to a fence line.
10.Markers are installed o n both sides of a stream, river, or other water crossing , and on both sides of aboveground attachments such as bridges and walls . Remove and replace all marker posts d amaged during installation at no additional cost. Ensure that route marker signs are labeled with a unique identification number, as detailed in the Plans or as approved by the Engineer. Provide as -built documentation at the completion of installation that includes identification number and location of all installed route markers and correlates the marker to the fiber optic infrastructure that it signifies. Ensure that installation of ERMs includes connection of the route marker to the locate wire associa ted with the conduit run that the markers identify. Install locate wire through the base of the marker and terminate the locate wires to connectors mounted on the terminal board inside the marker. Install an underground magnesium anode a minimum of 10 feet away from the marker and perpendicular to the conduit system. Terminate the anode lead on the connector mounted on the terminal board inside the marker. Install the bond straps between the anode connector and all locate wire connectors to provide cathodic protection for the locate wire conductor.
630-4 Method of Measurement.
The Contract unit price per foot of conduit, furnished and installed, will include furnishing all hardware and materials and all testing as specified in this Section and the Contract FY 2023-24 Return to Table of Contents Documents, and all labor, casings, removal of excavated materials and spoils, removal and disposal of drilling fluids, locate wire, trenching, boring, backfilling, flowable fill and restoration materials necessary for a complete and accepted insta llation. Payment for conduit placed underground will be based on the horizontal length of the trench or bore measured in a straight line between the centers of pull boxes, cabinets, poles, etc., in linear feet, regardless of the length or number of condu its installed. No allowance will be made for sweeps or vertical distances below the ground. Payment for conduit placed aboveground or bridge mounted will be based on the actual length of conduit installed. Payment for each individual conduit run embedded in concrete barriers or traffic railings, as shown in Standard Plans, Index 630-010, will be based on the length of the concrete barrier or traffic railing section that includes the conduit, regardless of the actual length of conduit installed. Th is length is limited by the begin and end of the concrete barrier or traffic railing run and includes the portions of the conduit exiting the structure towards the ends of the concrete barrier or traffic railing as shown in the Standard Plans. This include s all expansion and expansion/deflection fittings, but no allowance will be made for sweeps or vertical distances below the ground. Payment for conduit embedded in miscellaneous concrete structures will be based on the length of each individual conduit run, measured in a straight line between centers of junction boxes, regardless of the length of conduit installed, and will include all expansion and expansion/deflection fittings. Conduit that does not both begin and end at a junction box will be considere d incidental to their related items of work. Payment for replacement of route markers, per each, will be made only for those markers identified in the Plans.
630-5 Basis of Payment.
Price and payment will be full compensation for all work specified in t his Section. Payment for conduit placed under existing turf will be made as open trench . Payment for conduit placed under existing pavement (roadway, driveways, or sidewalk) will be made as directional bore , unless specifically identified as open trench. If conduit is being placed under both existing turf and existing pavement between two pull boxes, payment for the total pull box -to-pull box length will be made as directional bore. Payment for conduit placed by jack & bore will be made as jack & b ore, for the total pull box to pull box length. Payment for conduit embedded in concrete structures or traffic railings will be made as embedded conduit. No additional payment will be made for multiple conduits in the same trench. No payment adjustment will be made if the Contractor chooses to use an alternative method approved by the Engineer. No payment will be made for failed bore paths, injection of excavatable flowable fill, products taken out of service, or incomplete installations. Payment for r eplacement of route markers will include all the work, labor, equipment, and materials specified in this Section. No separate payment for route markers will be made for new conduit installation. Payment will be made under: Item No. 630 - 2- Conduit - per foot. Item No. 630 - 3- Replace Route Marker for Existing Conduit - per each. FY 2023-24 Return to Table of Contents SECTION 632 SIGNAL CABLE
632-1 Description.
Furnish and install underground and aerial signal cable as shown in the Plans and in accordance with Standard Plans, Index 634-001.
632-2 Materials.
Use only new materials meeting the requirements of this Section.
632-2.1 Signal Cable: Use either polyethylene insulated, polyvinyl chloride jacketed
signal cable conforming to the requirements of the International Municipal Signal Association, Inc. (IMSA ) Specification No. 19-1 or polyethylene insulated, polyethylene jacketed signal cable conforming to the requirements of IMSA Specification No. 20-1. Use signal cable conductors of stranded copper, No. 14 AWG or larger.
632-2.2 Cable Support Wire: Provide utilities grade zinc -coated support wire meeting
the requirements of ASTM A475, whether separate or integral to signal cable, having a minimum nominal diameter of 1/4 inches.
632-2.3 Cable Attachment Hardware: Ensure that all bolts and nuts less tha n 5/8 inch
in diameter are passivated stainless steel, Type 316 or Type 304 and meet the requirements of ASTM F593 and ASTM F594 for corrosion resistance. Ensure that all bolts and nuts 5/8 inch and over in diameter are galvanized and meet the requirements of A STM A307. Use attachment hardware with sufficient tensile strength for the application. Use stainless steel lashing wire, galvanized or stainless steel lashing rod, cable rings or self -locking cable ties of UV stabilized black plastic having a minimum tens ile strength of 100 pounds.
632-3 Installation Requirements.
Except for mast arm assemblies, install signal cable in continuous lengths between the traffic signal controller cabinet and the first disconnect hanger (or traffic signal head) on the span and between the traffic signal controller cabinet and each pedestrian signal head and pedestrian detector. Do not use the neutral return conductor for pedestrian detectors as a neutral return for any other device. Conductors for the pedestrian signal head and the push button must be separated at the base of the pedestal and routed to the detection panel using separate raceways.
632-3.1 Number of Conductors: Determine the number of conductors required for each
signal cable unless specified in the Contract Docu ments. Provide three spare conductors for each signal cable used at all signal installations. Install the three spare conductors from the controller cabinet through each disconnect hanger (or traffic signal head) to the furthermost disconnect hanger (or traffic signal head). Identify all spare conductors in a controller cabinet and ground them to the controller cabinet ground bus bar. Provide spare conductors within the controller cabinet of sufficient length to reach the furthermost field wiring termin als in the cabinet.
632-3.2 Protection of Cable: Ensure cable drawn through conduit, ducts, drilled holes
protected by a rubber grommet, or support structures is installed in such a manner as to prevent damage to conductors or insulation. FY 2023-24 Return to Table of Contents
Source: Florida Standard Specifications for Road and Bridge Construction, 2024 Edition. Pages 843–850 of 1,299.