For simplex or duplex cables whose jackets fit within the connector, the length of jacket removed will be specified by the connector manufacturer. Whenever possible, begin the installation from the top, allowing the weight of the cable to help the pull rather than adding more load. In-floor conduits are often embedded in concrete, making it particularly difficult to make adds, changes and moves. Improperly installed or missing grounds. Therefore, to ensure a smooth and efficient cable pulling process, installers should get fully prepared for the work, and take various factors into consideration to avoid damaging the cable.
You can get more details about aerial fiber cables here: The purpose of this survey is to plan the cable route which will determine the aerial cable installation method to be used, as well as the equipment and material requirements. If you are ever concerned that you may be exceeding listed cable values or are not certain what they are, contact the manufacturer. Key topics include networks for cloud computing, software defined networking, integrated and embedded networking appliances, and low latency networks for financial trading or other time-sensitive applications. Both of these materials serve as the load-bearing members of an optical fiber-cable during installation. Secure the cable to the tray to avoid damage during changes, and attach it at least every three feet. The pulling force must also be kept uniform.
Step Five: Use a swivel when pulling fiber optic cable to make sure twists in the pull rope are not translated to the fiber-optic cable. Some applications may present conditions where the configuration of the equipment will damage the cable by overbending it if precautions are not taken. Aramid is most easily cut with utensils sold specifically for the purpose, although razor blades and scissors do work. Related Articles: Fiber Optic Solutions Proudly powered by WordPress. Post-construction inspection is also important for a successful cable deployment.
Improperly installed or missing drip loops. Fish tapes or pullcords should always be placed in the conduit to ease installation. Pulling Force The pulling force must be kept below a designated limit for the specific cable being installed. Tools sold for one-step removal will take off the buffer and coating with one action. The tight-buffer cable construction was developed for both indoor and outdoor premises wiring applications. There are many aspects of optical-fiber cable installation that could be examined, but two of the most important from a practical standpoint are general guidelines for installation in the building spaces most commonly associated with premises wiring-horizontal runs, runs above ceilings and below floors, runs in cable trays, riser runs-and specific procedural hints that apply to most or all optical-fiber cable pulls-jacket removal, handling core components, fiber stripping and using breakout kits.
The two-step procedure requires two tools-one to remove the buffer and another to remove the coating. Outdoor fiber optic cable plant is harder than indoor optical cable installation. Optical-fiber cable should always be run in trays to avoid as much tension, crushing and bending as possible. Monitor tensile loading during pulls, and avoid pulling long lengths in one direction. The loose-tube cable construction was developed for long-haul telephony applications that require a rugged, low-cost, high-fiber-count outside-plant cable solution.
Pull boxes are installed for several reasons, including fishing the run and looping the cable for the next length of conduit. A cable rated for plenum installation will have low-smoke characteristics. Grasp the cable end with one hand and pull both ripcords, one at a time, with the other hand. In tray and rack installations, the minimum bend radius must also be monitored, because the cable will be routed around corners or through transitions. Typical values for outer jacket removal for these cables are 1.
This completely up-to-date edition is an essential on-the-job reference. During the process, installers should avoid cable damage, despoiling the fiber properly, and take pulling force into account. Optical-fiber cables intended for vertical applications have a calculated maximum vertical rise value assigned to them. Chomycz is the author of Planning Fiber Optics Networks. With 90% new content, this edition contains all new material describing the transformation of the modern data communications network, both within the data center and over extended distances between data centers, along with best practices for the design of highly virtualized, converged, energy efficient, secure, and flattened network infrastructures.
Interconnect cables: Simplex and duplex cable jackets are usually removed no more than a few inches from the point of termination and are easily taken off using standard buffer or jacket strippers. Unitized distribution cables have aramid yarn within and jackets over each subunit, which must also be cut back. In loose-tube cables, the coated fiber floats within a rugged, abrasion-resistant, oversized tube that is filled with optical gel. Pull the cable to the open junction box, coiling it loosely on the ground; then, feed the coiled cable through the rest of the run. Sometimes the addition of a piece of conduit beyond the transition will keep the cable from resting on a sharp edge.
Secure cables in all installations. A junction box can be used to break up a cable pull at a sharp transition. Loose tube cables are often designed for underground use or aerial use when lashed to a messenger. Many dropped ceilings or raised floors have panels that are easily removed or opened to provide fast access. Do not crush the cable; avoid impacts to it.
Tools Function Aerial lift truck In some lashing operations, workers will be sent to the work station and restored to travel position using the aerial lift truck. Unless the appropriate jacket material is used, most cables will be incapable of passing a flame test. The selection of splice locations in the survey allows verification of the transmission design and make preparation for cable order lengths. Step Six: After pulling fiber optic cable, cut off approximately 10 feet of cable from the pulling end to remove any portion of the cable that may have been stretched or damaged during installation. Conclusion Pulling fiber optic cable is a dispensable and rather important part in fiber cable installation. Every cable will have values for minimum bend radius and maximum tensile loading; do not exceed these values.