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 When casings are used, it is preferable that they be withdrawn as the shaft is filled with concrete.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 681 terminating to the ground connector in the pole shaft or parapet bracket. The other end of this conduit, which terminates in a ju nction box, shall be bonded to the junction box frame and to an insulated ground conductor which shall be installed in the same conduit as the lighting circuit conductors. This ground conductor shall be continuous across each bridge, and it shall be attach ed to the ground rod in the junction box or lighting support adjacent to each end of a bridge.
662.13.5 Service and Control Stations: Grounding of all service and control stations shall
be accomplished by means of a ground connector installed in the ser vice cabinets where shown on the Plans and bonding all conduit ground bushings, metal casing of equipment, and neutral conductors by means of individual # 4 conductors, as elsewhere specified to the above mentioned ground connector. The other ends of these conduits shall be bonded together and connected to the ground rod in the adjacent concrete junction boxes.
662.14 Testing :
The Contractor is advised that before proceeding with any work under this Contract, the Contractor shall conduct the necessary continuity and insulation tests to establish the integrity of cable runs already in place. The Contractor shall report any cable fault found to the Engineer. In case any fault is located while contract work is in progre ss, and which has not been reported by the Contractor as prescribed, then the Contractor shall be responsible for the correction of any such fault without any extra compensation. Continuity and insulation tests shall also be performed in a manner satisfac tory to the Engineer on cable runs to be placed under this contract. The Contractor shall be responsible for the correction of any fault discovered. With all equipment connected to the wiring system, a functional test shall be performed by the Contractor in the presence of the Engineer to demonstrate that the system as a whole and all parts thereof function as specified or intended. Any defective materials or faulty or improper installation shall be permanently corrected by repairs or replacements to be ma de by the Contractor to the satisfaction of the Engineer at no additional cost. Lighting circuits shall then be subjected to such other tests as may be required, including additional insulation resistance testing as detailed in 662.9, and shall be the res ponsibility of the Contractor to perform these tests in the presence of the Engineer or authorized representative. All tests shall be performed at the expense of the Contractor. After the installation is completed, the Contractor shall conduct a continuou s 24-hour operating test for approval. In addition, final acceptance of an installation will not occur until 30 days of operation termed satisfactory by the Engineer. During the 30 days of operation, the Contractor shall be responsible for repairing or replacing any defective equipment within 24 hours after being notified by the Engineer. After any malfunctioning equipment has been repaired or replaced, the 30 day test shall begin anew. The Contractor shall inspect and certify to the replacement of all da maged traffic signal loop conductors and to the proper functioning of the traffic signal, and that the junction boxes within the project limits comply with section 660.15. The inspection shall be performed before project completion and after all the work has been completed in the area of the traffic signal system and related components. The Electrical Inspection shall be paid as item 662015 -*, Electrical Test, per Lump Sum.