- 185 - SECTION 401-- LIGHTING, TRAFFI C SIGNAL AND INTELLIGENT TRANSPORTATION SYSTEM (I TS) DEVICE GENERAL REQUIREMENTS
401.01 Description
1.The requirements in this Se ction apply when the Contractor furnishes or installs all or part of the following systems:
a.Sign lighting system. b. Traffic signal system.
c.Permanent lighting system.
d.Temporary lighting system. e. ITS Devices. 2. When the pay item listed in the Basis of Payment Subsection of each Section includes the word "Install" , then the Department will furnish the item and the Contractor shall install it. If the word "Install" is not in the pay item listed in the Basis of Payment Subsection of each Section, then the Contractor shall furnis h and install the item.
3.Specifications for State suppli ed items are available for viewing at the Nebraska Department of Transportation Construction Office, Room 104, 1500 Nebraska Highway 2, Lincoln, Nebraska.
401.02 Material Requirements
1.Prior to ordering any material, the Contractor shall submit to the Engineer, for review, 8 copies of a list showing all roadway lighting system, sign lighting system, traffic signal system and ITS device items to be used on the project. This list of items shall be known as the "Materials List." A separate material list shall be submitted for each system involved. Material Lists combining items from different systems will be returned without review for resubmittal as separate Material Lists. No shop dr awings or certificates of compliance will be reviewed without first having received the correct Materials List.
2.All equipment and material must be reviewed before installation. Once reviewed, there shall be no substitutions for any of the items on the "Materials List" without a prior written request for a substitution and written approval by the Engineer. The Department shall not be liable for any equipment or materials ordered or purchased by the Contractor before review.
3.The Contractor shall provide 8 se ts of submittals as required by Table 401.01. These submittals will be reviewed for compliance with the contract. Materials to be incorporated into the project will be checked for compliance with the reviewed submittals.
4.The Contractor shall transfer all manufacturer's warranties and guarantees to the Department. All manufacturers’ warranty and guarantee documentation and all operation and parts manuals shall also be given to the Department.
5.All items shown on the "Mater ials List" will be reviewed for compliance with the contract. Two copies of the reviewed "List" will be returned to the Contractor. Review does not relieve the Contractor if submittals differ from the contract. If sufficient data is not available to Lighting, Traffic Signal a nd Intelligent Transportation
401.02 System (ITS) Device General Requirements
- 186 - determine compliance, additional data will be requested in the form of catalog cuts, test data, or actual samples.
6.The Contractor shall inform his/ her suppliers that all items supplied to the project must be suitably stam ped, stenciled, tagged, or otherwise marked to allow for easy identification with the descriptive markings, brand names, and catalog numbers shown on the "Materials List" and shop drawings.
7.The Contractor shall furnish sa mples, upon request, of any item or material to be furnished on the project. Unless destructive testing is required, the sample will be returned. Table 401.01 Required Submittals Item Mfr.’s Model or Cat. No. Shop Drawings Certificate of Compliance Other
a.Traffic Signal Pole X X
b.Light Pole/Tower (Metal) X X
c.Pole (Wood) *
d.Anchor Bolt X X
e.Pull Box X
f.Luminaire X **
g.Photo Control X
h.Power Foundation X X
i.Traffic Signal Controller X
j.Street Lighting Control Cabinet X
k.Signal Head X
l.Ped. Pushbutton and Sign X
m.Signal Mounting X
n.Relay & Cabinet X
o.Disconnect & Cabinet X
p.Vehicle Detecto r X
q.Vehicle Detector Sealant X
r.Lamp X
s.Electrical Wire and Cable X
t.Conduit X
u.Ground Rod X
v.Mechanical Connector X
w.Fuse Holder X
x.Fuse X
y.Expansion Coupling X
z.Lightning Arrestor X aa. Recessed Junction Box X bb. Utility Pedestal X cc. Breakaway Device X dd. Grounding Connector X ee. Permanent Identification Tag X * Manufacturer’s data describing specie, size, class, and treatment. ** Photometric data base in standard IES format. Lighting, Traffic Signal and Intelligent Transportation System (ITS) Device General Requirements 401.03 - 187 - 8. All materials shall conform to the requirements of Table 401.02. Table 401.02 Material Requirements Item Section Portland Cement Concrete ........................................ . 1002 Reinforcin g Steel ....................................................... . 1020 Gray Iron Castings ..................................................... . 1051 Zinc Coating on Hardware ......................................... . 1059 Painting ...................................................................... . 1077 Light St andards ......................................................... . 1073 Traffic Signal Standar ds ............................................ . 1073 Anchor Bolts .............................................................. . 1073 Ground R ods ............................................................. . 1073 High Mast Towers ...................................................... . 1073 Control C enters.......................................................... . 1073 Photoelectric Controls ................................................ . 1073 High Mast Luminai res and Lamps ............................. . 1073 Wall Mounted Luminaires .......................................... . 1073 Electrical Wi re and C able .......................................... . 1073 Miscellaneous Materi als ............................................ . 1073
9.The Contractor shall submit the following signed certification upon completion of lighting and traffic signal work. “The lighting and traffic signal materials installed are the materials specified in the contract or identified on reviewed submittals. These lighting and traffic signal materials have been installed in accordance with the contract, National Electric Code and other appropriate electrical safety codes.”
10.All payments for lighting and traffic signal items will be deducted if the certif ication statement i dentified above is not received by the Project Manager.
401.03 Tests of Lighting Systems
1.The Contractor shall demonstrate to the Engineer's satisfaction that the complete system is in proper wo rking order before final acceptance. The Contractor shall furnish all equipment and personnel necessary to perform operating circuit and resistance tests at no additional cost to the Department.
2.The Contactor shall take each ci rcuit's voltage and current readings at the power source and in the base of the light pole furthest from the source.
3.Data from the above tests shall be furnished to the Engineer in writing.
4.Resistance to ground shall be measured at random locations for noncurrent-carrying components, and in sulation resistance tests shall be conducted when required by the Engineer.
5.The system shall be placed in normal operational mode after satisfactory completion of all required tests. Final acceptance will not be made until the system has operated sati sfactorily for a period of not less than 14 days. Lighting, Traffic Signal a nd Intelligent Transportation
401.04 System (ITS) Device General Requirements
- 188 - 401.04 -- Grounding
1.a. All poles, controllers, and control centers shall be properly grounded by means of a copper cl ad ground rod and copper grounding electrode conductor.
b.Unless indicated otherwise, grounding conductors of No. 6 (4.67 mm) gauge or larger diameter wire shall be stranded.
c.The grounding conductor shall be grounded at the service disconnect and bonded to all ground rods and all non-current carrying components within the system.
2.a. All permanent lighting and signal systems shall have a grounding conductor (equipment ground) installed throughout the system.
b.The grounding conductor shall be grounded at the signal controller cabinet or control center and bonded to all poles, ground rods, and all non-current carrying components within the system.
c.The grounding conductor shall not be used for a neutral wire in the system and shall be tied to the AC neutral wire only in the controller cabinet or lighting control center.
3.When using a transformer type breakaway base, the grounding conductor shall be attached to the breakaway base.
4.A grounding conductor is usually not required in temporary lighting systems except that in some service areas the servicing electrical utility company may require a grounding conductor be used.
5.All ITS device supports, controllers, and service disconnects shall be properly grounded by means of a copper clad ground rod and copper grounding electrode conductor.
a.All ITS device systems shall have a grounding conductor (equipment ground) install ed throughout the system.
6.All pull box rings and covers shall be grounded as shown in the contract.
401.05 General Construction Requirements
1.When the location at which the C ontractor is to obtain electrical power is pre-arranged with the local utility, this location will be shown in the contract. These locations are approximate and subject to change. The Contractor shall make final arrangements for electrical service with the utility company. The Contractor shall arrange for services not predetermined.
2.System Operation: a. Workable segments of the in stallation shall be "turned on" and made to operate normally as soon as possible if the road is open to public travel.
b.The Engineer shall be not ified at least 2 NDOT work days before energizing any electrical system.
c.Electrical systems shall not be put into operation until the Engineer's authorized repr esentative is present.
d.Unenergized circuits may be tested at any time. Lighting, Traffic Signal and Intelligent Transportation System (ITS) Device General Requirements 401.06 - 189 - e. Operation of the system shall not be construed as an acceptance of the system or any part of the system or as a waiver of any contract provisions.
f.The Contractor shall be fully responsible for proper operation of the system before final acceptance and shall remedy any defects or damages which may occur at no additional cost to the Department.
3.All installations shall be in accordance with the National Electric Code and all governing local ordinances and regulations. Roadway lighting, traffic signal systems and signing systems are not subject to inspection by the state, county, or city electrical in spectors. Area lighting at weigh stations and rest areas are subject to this inspection.
4.All work shall be performed by competent tradespersons experienced in their craft and under the supervision of a licensed journeyperson electrician or linepers on. The licensed supervisor shall be on the job site whenever work is being perfo rmed. Any portion of the installation which presents an appearance of careless or shoddy work will be rejected.
5.The Contractor sha ll contact the local electrical utility company at least 3 NDOT work days prior to installing any equipment on the utility's poles or requesting final service connections. The Contractor shall not attach or connect any equipment to any utilit y without specific permission from the owner of the facility.
6.The Contractor shall replace and restore all plant materials and roadway structures disturbed by tr enching, excavating, or backfilling operations. The Contractor shall dis pose of all excess excavation and trenching material.
7.The Contractor shall be responsible for any tree trimming required. 8. The Department will not require the Contractor to pay for electrical energy consumed by the permanent lighting system or traffic signal system.
9.The Contractor shall be requ ired to pay for the connection and electrical energy consumed by a tem porary lighting system or temporary traffic signal unless indicated otherwise.
10.The Contractor shall be responsible for determining the location of all underground utilities.
401.06 Secondary Electrical Connections
1.Roadway and Sign Lighting Systems: Cable connections shall only be made in pull boxes, pole bases, luminaries, and junction boxes. Connections will not be allowed in earth or conduit. All connections shall be made in accordance with the cable manufacturer’s recommendations an d the National Electric Code. Submersible, secondary, mechanical connectors meeting ANSI C119.1 are required in all pull boxes, and at other locations susceptible to moisture.
2.Traffic Signal Systems:
a.Traffic signal cable and detector lead-in cable shall not be broken and spliced between the cont roller cabinet and the cables final destination without the approval of the Nebraska Department of Transportation Traffic Engineering Division. Approved splices shall only be Lighting, Traffic Signal a nd Intelligent Transportation
401.06 System (ITS) Device General Requirements
- 190 - made in cabinets, pull boxes, junction boxes, pole bases, and signal heads. Splices will not be allowed in earth, conduit, or exposed aerially.
b.Conductors to be spliced shall be twisted together to form a mechanically and electrically secure connection, secured with a wire nut or solder, and waterproofed. The waterproofing shall extend a minimum of 1- inch (25 mm) over the conductor insulati on. Splices in cabinets shall not be waterproofed. Waterproofing shall be accomplished with one of the following methods:
1.Self vulcanizing rubber electrical tape wrapped through the crotch of the splice then half-lapp ed over the entire splice. Cover the rubber tape with a half-lapped layer of plastic electrical tape.
2.Direct Bury Splice Kits as shown on the Department’s Approved Products List.
c.Finished splices shall be positioned upright and shall not be left laying in the bottom of pull boxes, pole bases, or cabinets. The splice shall be within 6-inches of pull box lids and above hand holes in poles.
d.Ends of spare conductors shall be sealed with flexible electrical coating compound.
3.ITS Devices Cable connections shall only be made in ITS device cabinets and junction boxes. No connections shall be made in pull boxes without the Engineer’s approval. Connections will not be allowed in earth or in conduit. All connections shall be made in accordance with the cable manufacturer’s recommendations and the National Electrical Code. Submersible, secondary, Mechanical Connectors meeting ANSI C119.1 are required for all splices outside of the controller cabinet and the sign housing.
4.Control Cabinet: Cable connections at the control cabinet shall be made at the terminal boards provided for this purpose. All stranded wires inserted under a binder screw shall be equipped with a solderless pressure type spade connector. Only one wire shall be used with each spade connector. No more than 3 spade connectors shall be in serted under the same screw without specific approval of the Engineer. Sp ade connectors shall not be used on solid wire.
5.Breakaway Connectors: a. "Breakaway Type" connectors shall be installed in each breakaway pole base as shown in the contract. Line and load sides of the connector shall be identified.
b.The phase conductors shall be fused and shall have the female part of the connector on the line side.
c.The neutral conductor, when such is employed in the circuit, shall not be fused and shall have the female part of the connector on the load side.
6.An antioxidant compound shall be used on all dissimilar metal connections. Lighting, Traffic Signal and Intelligent Transportation System (ITS) Device General Requirements 401.06 - 191 - 7. Inspection of Connections:
a.The Engineer may inspect five electrical connections at random. If these connections are found acceptable, the Contractor shall remake the inspected connections at no additional cost to the Department.
b.If any of the five connections are found unacceptable, ten additional connections shall be selected by the Engineer for inspection. If any of these connections are found unacceptable, the Contractor shall remake all connections on the project at no additional cost to the Department. - 192 - SECTION 402 -- WIRE AND CABLE IN CONDUIT
402.01 Description
1.The Contractor shall furnish and install wire and cable of the size and type shown in the contract. This work includes the wire and cable, splices, connections, terminations, identification tags, and all labor, equipment, tools, materials, and incide ntals required to complete the work.
402.02 Material Requirements
1.Traffic signal and roadway lighting conductors in conduit shall conform to the requirements of Sectio n 1073. Conductors used as a neutral must be designated white or gray. Insulated equipment ground shall be green. Line conductors shall be designat ed red and black. Cable in duct may be used in place of wire and cable only on roadway lighting and sign lighting systems and shall conform to t he requirements of Section 1073.
402.03 Construction Methods
1.Unless indicated otherwise, all traffic signal and lighting systems shall be installed with conductors in conduit.
2.Conduits:
a.The conduit must be conti nuous, reasonably dry, completely free of debris, and without any sharp projections, edges, or short bends.
b.The Engineer may require th e Contractor to demonstrate that the conduit is reasonably dry and free of debris by pulling a swab and/or mandrel through the conduit.
3.Conductors:
a.Conductors shall be installed in conduit only after the conduit system is completed and in place.
b.The wire and cable manufacturer's recommended maximum pulling tensions shall not be exceeded. If necessary, the cables shall be adequately lubricated to reduce friction and minimize possible damage. Lubricants shall be one of several commercially available wire pulling compounds that are suitable for the cables. They shall consist of soap, talc, mica, or similar materials and shall be designed to have no deleterious effects on the cables.
c.The Contractor shall not pull wire or cable without the Engineer present. The Contractor shall give the Engineer 24 hour notice before wire or cable will be installed.
4.Pulling Cables:
a.All cables shall be neatly trained to their destinations in cabinets, pole bases, transformer bases, pu ll boxes, junction boxes, or other enclosures. The destination of all cable runs shall be clearly identified by the use of permanent, non-ferrous or plastic tags stamped or embossed with the direction of the cable run and attached to the conduit in which the cable is housed. Conductor runs shall be tagged at all intermediate points along the run such as in pull boxes, junction boxes, pole bases, and transformer bases. In instances where the conduit housing the conductor is inaccessible, such as in anchor base pole installations, the identification tag shall be attached to the conductor itself.
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 219–225 of 1,048.