679 The polyethylene ducts, where required, shall be continuous to within six (6) inches of a terminal connection. The Contractor shall exercise care in the installation of the cable -in-duct to insure that the completed duct raceway is smooth and free of sharp bends and that the cables inside the duct are free and are capable of being removed and replaced in the completed cable -in-duct assembly. Connections and terminations of cable required at existing distribution centers including fuses, hardware and site restoration as required to make the lighting circuits complete and operable, and installation of ground rods to sign bridges shall be considered incidental to this item
662.11 Lighting Supports :
Lighting supports shall be located in accordance with the details shown on the Plans governing the spacings and set backs to provide continuously aligned lighting support installation, unless otherwise ordered by the Engineer. All anchor bolts shall be installed, tightened and tested in accordance with sections 658.5.1, 658.5.3, and 658.5.4.
662.11.1 Types I, II, III, IV, V a nd VII: Luminaire support arms shall be set normal to
the roadway unless otherwise directed by the Plans or the Engineer. Each lighting support (except for twin arm poles and Type VII) shall be raked a horizontal distance from vertical at the top of the pole equal to the taper of the pole in inches per foot times the height of the pole in feet, unless otherwise directed by the Plans or the Engineer. Lighting support wiring shall consist of # 10 AWG single conductor, THWN insulated wire for both neutral a nd phase legs, and shall conform to the requirements for cables outlined in the preceding paragraphs. When Type V lighting supports are to be erected on bridges, the entire assembly, including support arms and luminaires, shall be fully installed as a co mplete assembly at one time. When Types V or VII lighting supports are to be in contact with dissimilar materials: e.g., non - galvanized steel or concrete, the contacting parts shall be protected from corrosion by appropriate painting as noted in Section 1.5.4 of AASHTO "Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals". Aluminum surfaces that are to be in contact with concrete shall be given a heavy coat of alkali -resistant bituminous paint before install ation. The Contractor shall take full responsibility for checking all cross sections to determine final support lengths.
662.11.2 Type X: The loading, transporting, unloading and piling of structural materials
shall be conducted so that the metal will be kept clean and free from injury in handling. Structural materials shall be stored above the ground upon platforms, skids, blocks or other supports. They shall be kept free from accumulation of dirt, oil, acids, or other foreign matter. The manufacturer shall supply the Division with complete written instructions for the installation, operation and maintenance of the lighting supports and also complete parts lists for all items included by manufacturer and part number. The Contractor shall in stall the lighting supports strictly in accordance with the manufacturer's instructions. Extreme care should be exercised during lifting and plumbing. The manufacturer shall supply factory assistance in field assembly and installation when deemed necessary by Division. After the lighting support with all devices has been fully erected, the lowering devices shall be subjected to repetitive cycles of operation as a test. 680 662.12 -FOUNDATIONS : Footers shall conform to the sizes and shapes shown on the Plans, and shall be poured monolithically. The excavation shall conform to the neat lines of the footer. The top twelve ( 12) inches and upper portion of the foundation shall be formed and floated a nd finished smooth on all sides. Castings may be used when deemed necessary by the Engineer to prevent caving of the soil. When casings are used, it is preferable that they be withdrawn as the shaft is filled with concrete. A concrete head of at least two (2) feet should be maintained above the bottom of the casing. If any upward movement of the concrete or reinforcement cage occurs at the beginning of the casing pulling operation or at any time during casing pulling, removal should be stopped immediately a nd the casing left in place. The conduit bends and anchor bolts shall be accurately set (by template) in the forms and rigidly held in position during concreting operations. No welding shall be permitted on anchor bolts, except at the bottom. Anchor bolts for Type X lighting supports shall be caged into a unit and shall include a steel template at the bottom for presetting. Reinforcement (vertical bars and hooping) shall be completely assembled and placed into position as a unit. The unit must be adequatel y supported in the excavation to insure centering for the entire length of the shaft.
662.13 Grounding :
662.13.1 General: The necessary conduit, conductors, bonding jumpers, clamps,
connectors, ground rods, etc. for the grounding system shall be furnished, installed and connected by the Contractor. The grounding system shall be considered as an integral part of the system to which it belongs, e.g. conduit, manholes, junction boxes, luminaires, lighting supports, service and control stations, navigation lighting system, structures, etc. as appropriate. In general, alternating current circuits, enclosures and frames of electrical apparatus, and conduit systems must be effectively and permanently grounded with a cr oss section as required by the National Electrical Code and of capacity sufficient to ensure continuity and continued effectiveness of the ground connections for fault current. Ground conductors must be as short and straight as possible, protected from mec hanical injury and, where practicable, without splice or joint.
662.13.2 Codes and Approvals: All grounding work shall be done in accordance with the
latest edition and revisions of the National Electrical Code and the regulations of State and local cod es. All connections in ground network shall be done of a type approved by NEC, Article 250.
662.13.3 Metal Conduits: All metal (rigid steel) conduit ends shall be bonded and
grounded by means of a # 8 bare copper cable. The grounding shall be accompli shed by driving ground rods as detailed on the Standard Drawings or the Plans. Grounding from the conduit to the ground rod in a junction box or manhole shall be accomplished by use of a # 8 bare copper cable. Grounding from the conduit to a lighting suppo rt shall be accomplished by use of an insulated (green) copper conductor equal in size to the largest adjoining phase wire except where otherwise called for on the Plans. The connection of the bonding cable to the junction box frames and to the shafts of t he lighting supports shall be done by means of a grounding stud. The neutral conductor shall be grounded at the service and control station.
662.13.4 Lighting Supports on Bridges: The lighting supports installed on bridge
structures shall be grounded by bonding the grounding bushings of the metal conduit