How To Install Fiber Optic Cable HANDLING FIBER OPTIC CABLE REDUCING LOSS BY PROPERHANDLING • Always follow the manufacturer's guidelines forminimum bend radius and tension. Failure to do so may result in high attenuation and possible damage to the fiber optic cable. Guidelines are normally supplied with the cable manufacturer specification sheets. If the bend radius specifications are unknown, the industry de facto standard is to maintain aminimum radius of 20X the diameter of the fiber optic cable. • Manufacturers may give two specifications for bothradius and tension. These are called Static and Dynamic specifications. "Dynamic" is the specification during the cable installation or while cable is under load, and "Static" is the specification for after installation is complete. • If using tie-wraps, remember not to distort the shape of the fiber optic cable, as this adds pressure onto the optical fibers. • Install fiber cables in a sequence that applies the least amount of strain on the cable. • Identify fiber cable at all likely access points (ceiling access, etc.). • Sharp bends increase cable tension, so it is best to install optic cable in sequences that minimize stress. • Use sheaths and cable guides to maintain recommended cable bend radius. • Monitor tension, and maintain racking bend radius. • Protect exposed fiber cables from vehicular and public traffic. • Prior to installation, double-check actual fiber count. • Always follow engineering and construction placement and route plans. • Always follow National Electrical Code guidelines, as well as local and state codes. • Maintain good communications between installation personnel. • When installing loose-tube cable, use a silicone injection or sealer to prevent gel migration. • For underground installation, center-pull long cables. Store excess cable in vaults/manholes, and identify optical cables with markers. • Aerial installation: Use proper hardware matchingcable, span and tension requirements. Use correct cable jacket. • Buried Cable Installations: Identify cable locations with surface markers. Anticipate obstructions PULLING FIBER LONG DISTANCES For extremely long pulls, the cable can be removed at a manhole further down the installation route. Figure-eight or zigzag the cable while the pulling equipment is moved to the next manhole site. Following these guidelines should help to make thecable installation uneventful and successful. |
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