Contract - INDOT - Traffic Signal Maintenance

Home Browse Search

twisting of the cable. As the cable is played off the reel into the cable feeder guide, it shall be sufficiently lubricated with a type of lubricant recommended by the cable manufacturer. A dynamometer or break away pulling swing shall be used to ensure that the pulling line tension does not exceed the installation tension value specified by the cable manufacturer. The mechanical stress placed on a cable during installation shall not be such that the cable is twisted or stretched. The pulling of cable shall be hand assisted at each controller cabinet. The cable shall not be crushed, kinked or forced around a sharp corner. If a lubricant is used it shall be of water based type and approved by the cable manufacturer. Sufficient slack shall be left at each end of the cable to allow proper cable termination. Also a small slack of cable shall be left in each handhole between intersections. At the cabinet controller shall be two (2) meters minimum storage at the handholes adjacent to the cabinet controller six (6) meters storage and at the top of each conduit riser six (6) meters after the support cable is stripped when figure 8 cable is used. For storage of additional slack cable adjacent to conduit riser the Contractor shall use Fiber Optic Strand Storage Unit to store and protect the fiber optics at the top of the risers. The support cable shall be terminated at the riser wood pole. Storage of additional slack cable in handholes shall be coiled. The slack coils shall be bound at a minimum of 3 points around the coil perimeter and supported in their static storage positions. Storage of additional slack cable adjacent to conduit risers and support poles shall be as detailed on the following page. At each controller cabinet and handhole the cable shall be visible marked/tagged as "CAUTION -FIBER OPTIC CABLE". Maximum length of cable pulling tensions shall not exceed the cable manufacturer's recommendations. At each handhole and cabinet, the fiber optic cable shall be painted for a length of 12 inches (305 mm) with 2 coats of long lasting and highly visible paint. The color shall be unique to each roadway as approved by the Engineer. For example, the cable for the major east -west street may be painted red, the cable for the major north -south street may be painted yellow, and the cable for the minor east - west street may be painted blue. Cable Installed on Aerial Spans: The fiber optic cable shall be figure 8 cable. All existing interconnect cable in risers, conduits, handholes, and controllers shall be removed. All existing interconnect cable not used to support the new fiber optic cable shall be removed. All existing state owned poles used exclusively for existing interconnect shall be removed if the new fiber optic cable does not utilize the pole. Existing conduit risers designated for re -use with fiber optic interconnect shall have the existing weatherhead removed. The lashing wire shall be either a dielectric or stainless steel lashing filament, and shall be securely tied off when terminated near each support pole. If the fiber optic cable is figure 8, the messenger cable portion shall be removed from the controller cabinet to the top of the nearest conduit riser. Removal of the messenger portion of the figure 8 fiber optic cable shall be performed with no additional payment. All fiber optic cable runs damaged as a result of the removal of the messenger shall be replaced, free of splices, with no additional payment. Placement of Cable into Conduit Risers: The Contractor shall provide conduit risers as indicated on the plans. Kellum grips and/or other hanger devices shall be used to support the vertical drop of cable and to prevent any possible kinking of the cable after installation. The top of risers shall have a hexnut type watertight service entrance connector with an oval shaped grommet. The grommet shall be either neoprene or rubber. The voids between the fiber optic cables(s) and the grommet shall be sealed with silicone. Page 48 of 53 Pages