Conduit runs should be limited to 100 feet, with no more than two 90-degree bends between pull points or boxes. Detailed diagrams and step-by-step procedures walk you through the entire process. Which Jacket Type Is Right? The selection of splice locations in the survey allows verification of the transmission design and make preparation for cable order lengths. During the process, installers should avoid cable damage, despoiling the fiber properly, and take pulling force into account. Although a tray provides sturdy support and basic protection for cable, there are still stresses to which the cable may be subjected.
Here are some common items during in the post-construction. Trees or other obstructions, which could hinder the placing operation, should be noted. This device locks onto and tightens around a cable as a tensile load is applied. Many optical-fiber cable designs utilize aramid yarn as the primary strength member. Horizontal cabling Intrabuilding conduit runs can be in ceilings or walls or under floors, although there are certain limits because conduit systems are very inflexible. Core components After the jacket has been removed to the required distance, the clear tape and ripcords can be cut back to the jacket. It is determined by the weight of the cable and its ability to resist buckling or kinking.
Heavy-duty breakout-style cables: All heavy-duty cables contain dual ripcords for jacket stripping and clear polyester tape wraps to maintain core symmetry and fiber protection. To get well-prepared, the following factors must be valued. Before-Pulling Considerations Preparation always serves as the very primary phase of the whole installation task. Do not exceed maximum vertical rise. Despooling Cable Properly Improper pulling and despooling of the cable can cause optical cordage failure. Damage to cable can come in many forms, and the common broken fiber is difficult to detect.
Pay attention to the exact location of all splice points so that they can be incorporated into the final design. Conduit can be made of metallic tubing or rigid polyvinyl-chloride plastic, according to the National Electrical Code. Installation guidelines include the following: Never kink the cable. Both of these materials serve as the load-bearing members of an optical fiber-cable during installation. Tray installation usually precedes pulling the fiber cable, because trays can be used for many other types of cable.
Score one side of the tube with the razor-but not too deeply-and bend the tube away from the score. 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. Related Articles: Fiber Optic Solutions Proudly powered by WordPress. Although it is not a fragile medium, optical-fiber cable must be carefully and expertly installed to realize its full potential. The amount of buffer or coating removed will depend on the application and termination procedure. Presence of kinked or damaged cable.
Multi-fiber cables will have longer lengths of jacket removed. Fish tapes or pullcords should always be placed in the conduit to ease installation. Cable quantity and other materials must be ordered. A junction box can be used to break up a cable pull at a sharp transition. During connectorization, the buffer is stripped back to an exact length as required by the connector manufacturer. For cables with ripcords, only the first few inches of jacket need to be removed.
Cutting edge topics such as photonic switching, wavelength division multiplexing and plastic fiber, and their implications for the future are also explored. Mark the cable with a piece of tape to show how far the jacket should be stripped. . Improperly installed or missing grounds. Fiber Installation Checklist Fiber-optic cable installations, with some foresight and care, can be done in such a way as to secure maximum cable performance. 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. When pulling cable in conduit, all transition points, such as those going from conduit to pull box or exiting the conduit, should be kept smooth.
Inaccurate measurements can result in disastrous issues. Every cable will have values for minimum bend radius and maximum tensile loading; do not exceed these values. Note: needs to be treated carefully, improper action may damage them easily; make sure there are enough cable blocks to use because insufficient can result in excess sagging of the fiber optic cable, more difficult pulls, and greatly increased chances of damage to the cable. Some applications may present conditions where the configuration of the equipment will damage the cable by overbending it if precautions are not taken. Cables in these spaces should be supported in some way, ideally in organized, easy-maintenance trays, wireways or racks. The separated piece of tube can be pulled off the end of the fiber.
Pull boxes are not used for splicing cable. In a premises wiring plan, this cable type is often used between buildings. The pulling eye can be pre-installed by the cable manufacturer. There are lots of unexpected factors occurring during the aerial fiber optic cable installation. If there is not much equipment in the air space, there can be ample room to work. When the area is used for environmental air handling, the cable must be plenum-rated. Flexible conduit can be placed within boxes or at interfaces to prevent pressure against the cable or scraping on rough edges.