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<br />.... , . <br />. .p'.. <br /> <br />e <br /> <br />e <br /> <br />Permanent, district-approved markers must be placed beside the cable route immediately to warn <br />against possible "dig-ups" in the future. The distance between markers should be 600 feet as a <br />minimum. <br /> <br />C.3.19 Duct <br /> <br />The fiber optic cable that is buried will be placed in duct or conduit. <br /> <br />C.3.20 Installation Procedures for Aerial Fiber Optic Cable <br /> <br />. 1. The contractor is responsible to check the inside edges of the reel for any sharp edges or <br />obstructions that may have occurred during shipment and could potentially damage the cable <br />sheath, or interfere with turning the reel and the cable deployment. An optical time domain' '. <br />reflectometer (OTDR) shall be used to verify that the cable has not been damaged during . <br />shipment. Readings obtained shall be used later for comparison With test acceptance data and as <br />part of a records package that will assist in emergency restoration. <br />2. The contractor is responsible to see that the cable is not kinked or that the minimum bend <br />radius (typically 20 times the cable diameter plus 2 inches for dynamic (installation) conditions), <br />and 10 times the cable diameter for static situations, (such as cable gored in a vault) is not <br />exceeded. Take all precautions that the cable is never crushed or twisted. Any such damage will <br />alter the transmission characteristics of the fiber and may require replacement of that cable <br />section. <br />3. During installation, be sure that the cable jacket is not damaged due to abrasion. Do not drag <br />the cable over obstructions in the span or on the ground. It is recommended that if obstructions <br />are observed, they should be removed, or a series of hold-down blocks be used to prevent contact <br />with the obstruction. <br />4. Do not overtension the cable. The chart lists the Maximum Rated Cable ;load (MRCL) <br />under the appropriate weather loading situation. If the cable is overtensioned beyond the MRCL, <br />fiber damage may occur that will alter the transmission characteristics of the fiber and/or require <br />replacement of the cable. <br /> <br />Fiber Count Span NESCL Loading <br />& Cable 0.0. (feet) Light <br /> Sag (%) Tension <br /> (lbs. ) <br /> 100 0.5 270 <br />_4..36 200 0.6 465 <br />0.512" 300 0.6 635 <br /> 400 0.7 795 <br /> <br />IBM Global Services &. La Porte ISO <br /> <br />peA 01 September 30.1998 <br /> <br />Page 25 or 32 <br />