2023-193 - Laserfiche WebLink

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All optical glass shall be of the same manufacturer. The cable shall be capable of withstanding a minimum—bending radius of ten (10) times its outer diameter during operation and twenty (20) times its outer diameter during installation, without changing the characteristics of the optical fibers. All fibers are to be single mode unless specifically noted on plans by the Owner. Unless specified otherwise, provide cable of water -blocked, loose tube construction with buffer tubes wrapped around a dielectric central strength member. All fiber(s) shall be contained within buffer tubes, and each buffer tube shall have an inside diameter much greater than the total diameter(s) of the fiber(s) it supports. The fiber optic cable shall have a reverse oscillation or planetary stranding structure. The buffer tubes and all fibers shall be color coded in compliance with EIA/TIA — 598 "Color Coding of Fiber Optic Cables". Jacket construction and configuration of the groups shall be such that they can easily be separated at splice points, permitting one set of fibers to be cut and spliced while the others remain continuous. The jacket or sheath shall be marked with the manufacturer's name, date of manufacture, cable description, and sequential measurement markings at least every 3'. IRC-IS&T shall be marked on the jacket/sheath for agency identification. Submit proposed cable designs for Owner approval priorto procurement and installation of cable plant if the cable is something other than what is normally used. The cable shall have a water -block tape over the buffer tubes and throughout the remainder of the cable, to prevent entry of water. Each fiber or group of fibers, shall be free-floating within the tubes such that all mechanically or environmentally induced stress placed upon the cable is decoupled from the fibers. The air within the buffer tubes shall be displaced with a gel to prevent entry by water and to facilitate free movement of the fiber(s) within. The cable shall be capable of withstanding a pull tension of 2700 N (600 pounds) under load condition and 600 N (135 pounds) under static conditions and a crush resistance of 220 N/cm (length of cable), without changing the characteristics of the optical fibers. The outer jacket shall be UV and fungus resistant. 7.5.4 Cables Labeling Cables shall be distinguishable from each other by labeling. Cable tags similar to Blackbox 32785 shall be attached to the cable at each pull box, pole attachment, or entry into a termination facility. The tag shall be marked as "IRC-IS&T, FIBER OPTICS, 772-226-4357". These tags will be provided by IS&T. 7.5.5 Riser Cables up to 24 Fibers (Multimode OFNP) In cables with more than one (1) fiber, the fibers shall be stranded around a dielectric central member and surrounded by layered aramid yarns. The aramid yarns shall serve as the tensile strength member of the cable. A ripcord may be applied between the aramid yarns and the outer jacket to facilitate jacket removal. The outer jacket shall be extruded over the aramid yarns for physical and environmental protection. 7.5.6 Riser Cables with more than 24 Fibers (Multimode OFNP) The buffered fibers shall be grouped in twelve (12) fiber subunits. In each subunit, the individual fibers shall be stranded around a dielectric central member and surrounded by layered aramid yarns. A ripcord shall be incorporated in the subunit design to facilitate access to the individual fibers. The subunit jacket shall be extruded over the aramid yarns for additional physical and environmental protection. The subunits shall be stranded around a dielectric central member. A ripcord shall be inserted beneath the outer jacket to facilitate jacket removal. The outer jacket shall be extruded around the units for physical and environmental protection. 29