Underground Cable Installation. The backwards compatibility assurance provides some degree of confidence when a higher category or type of connectivity (e.g., patch panel connectivity) is placed onto a lower category or type of cable (e.g., category 6 with category 5e or OM2 with OM3), the combination of the two different levels of transmission performance will operate to the lesser of the two levels. In This report also provides mitigation procedures to improve the performance of class E channels to the point where the application is supported. all coupling used for this test for leaks, using soap, water and a sponge. That means any pulleys or capstans being used to pull the cable has to be 20 inches diameter its bend radius, remember and the diameter of a round object is 2 times the radius. For code references, we suggest that you research the following NFPA 70, NEC references: Cabling standards do not necessarily provide pros and cons of installation methodologies such as the use of trunking assemblies or field termination of cabling components. The two most common outdoor fiber optic cable installations in Ohio are pole-line aerial . A pulling wheel that monitors and limits tension to prevent exceeding the tension limit of the cable. Weve seen photos of crews installing fiber standing on the cable or even driving vehicles over it. the cable jacket and cut back all fibers to the end of the jacket, leaving the aramid strength members only. In many such cases, the AHJs typically do not permit such installation methods; however, the decision is actually based on the AHJs interpretation of the codes. Qualification of the network interface card (NIC) for noise immunity. Fiber pulling is effective over short distances only. Whether these requirements are met by a specific channel is influenced by the components and installation practices used. must be transported or stored with their battens intact. The ANSI/TIA-758-A-2004 standard known as Customer-Owned Outside Plant Telecommunications Infrastructure Standard offers the following guidance for the distance between handholes or pull boxes: "4.1.1.2.3 Lengths between pulling points For example, slab-on-grade construction where pathways are installed underground or in concrete slabs in direct contact with soil (e.g., sand and gravel) is considered a wet location. Rapid Deployment Installations may be quicker once trunking assemblies are on-site, potentially reducing on-site installation time by up to 75 percent, some manufacturers claims. that there is a swivel between the cable sock and the hauling rope. Wet Do Additional text in this chapter states: "A transition point is described as a location in the horizontal cabling where flat undercarpet cable connects to round cable. This is known as Annex C (informative) Noise reduction guidelines. the aramid yarn into two bundles and loop it through the swivel eve in opposite directions. Note: The following is not to be considered an authoritative list, rather it is supplied as information for developing an evaluation process. This is on a run of approx. Bend radius limits can also be violated easily when pulling the cable out of the conduit if the tension is applied at an angle as shown by the red dotted line above. That PODCAST: Peter Jones and Sam Johnson, Ethernet Alliance. To Ensure the inside opening area is a minimum of 240 square inches and no inside dimension is less than 12 inches. use of a flexible cable guide placed between the HH / MH lid and duct to be used. Fit Pull The second set of source documents includes the BICSI Reference Manuals. The bottom line is, if you desire to achieve 10GBASE-T support up to 100 m without the need for potentially costly mitigation techniques, you must specify and install class Ea/category 6a or higher cabling system products that fully comply with ISO/IEC 11801-2002 Ed.2.0 Amendment 1, "Information technology - Generic cabling for customer premises - Amendment 1" and ANSI/TIA-568-B.2-10, "Transmission Performance Specifications for 4-pair 100 ohm Augmented Category 6 Cabling." In situations where optical fiber or balanced twisted-pair telecommunications cabling (cable or connecting hardware) has been exposed to liquids or otherwise coated with or exposed to direct contact with solvents, paints, adhesives, sealants or other third party materials, it may not be possible to guarantee that physical or electrical degradation either has occurred or may occur over the life of the telecommunications cabling products. Undercarpet cabling is rarely used but may be appropriate when other pathway systems are either not available or not applicable." installers must be properly trained and certified. The UTOPIA Fiber has rolled out thousands of miles of reliable fiber optic cable from Tremonton to Santa Clara. 10.1.3 Pull Box Material If ", "The maximum rated cable load (MRCL) for most OFS outside plant fiber optic cables is 600 lb; however, the cable documentation should always be checked, because lower values of MRCL may apply for some cables. In either event, the use of bushings is generally prescribed as a best practice that should always be considered. Allows modular implementation of different parts of this Standard. As previously suggested, the bottomline is if you desire to achieve 10GBASE-T support up to 100 m without the need for potentially costly mitigation techniques, you must specify and install class Ea/category 6a or higher cabling system products that fully comply with ISO/IEC 11801-2002 Ed.2.0 Amendment 1 known as "Information technology - Generic cabling for customer premises - Amendment 1" and ANSI/TIA-568-B.2-10, "Transmission Performance Specifications for 4-pair 100 ohm Augmented Category 6 Cabling.". Bending the cable too tightly can be done by pulling the cable at the wrong angle out of a duct or across a pulley that is too small. A sponge is typically 100mm in length and 2 x the duct ID. Test Manholes and ducts should be inspected to determine the optimum splice locations and duct assignments. Underground Pull Boxes can be used as an equipment enclosure, splice box, or pull box.These boxes are used to store electrical wiring, fiber optic cable, phone lines, water lines and other wires or cables that are buried underground.They are typically constructed of heavy duty polymer concrete reinforced with fiberglass, but traditional concrete is also a popular choice. What's the minimum distance between the two 3-in. Tie Compliance of cable and connecting hardware to LCL/TCL recommendations in TIA/EIA 568-B.2-1. As you look further down the table, note that unscreened class E/category 6 cabling is distance limited up to only 55 m while screened class E/category 6 cabling appears to support the 10GBASE-T application out to 100 m. The key to understanding these length limitations is to understanding the implications of the cabling references which are also listed in the table. As a result of the changes in the loss budgets from one generation of network equipment to another, care should be taken in the design and installation of the optical fiber cabling in order to support the desired applications equipment. In optical fiber cabling and balanced twisted-pair cabling, it is possible to design and manufacture connecting hardware in such a way as to tune the components in order to optimize their transmission performance characteristics. Align The general intent is that cabling is protected from damage by any means. Should there be an event which is outside the control of the cabling system manufacturers, such as the exposure (as noted above) to the telecommunications cabling products, the manufacturers warranty may not provide coverage for such situations. The plethora of fiber optic cable types can seem overwhelming, but choosing the right cable for the job is important. To These high fiber count cables are very high density and often use regular or flexible ribbons since ribbon splicing is necessary to splice these cables in any reasonable time. Listing Install listed optical fiber cables and raceways as indicated in Table 770.154 (A) and as limited by 770.113. For a better experience, please enable JavaScript in your browser before proceeding. Section 250.112 Connected by Permanent Wiring Methods, Look at Section 250.112(I) Power Limited Remote Control, Signaling, and Fire Alarm circuits. Conduits, Pathways and Spaces Conduit Bend Radius for Fiber Optic Cable Toggle accordion The Use of Bushings on Conduit Pathways Toggle accordion Fill Rates and Number of Cables when Using Conduit with Bends Toggle accordion Mixing Coaxial, UTP and Power Cables in One Conduit Toggle accordion The Number of Cables that Can be Placed Inside a Conduit It's not the length of the pull that makes it hard. Rope and many other types of cable can withstand tighter bending than fiber, so the hardware is smaller and potentially deadly to fiber optic cable. The NFPA 70, NEC2008 edition states, in part: 800.24 Mechanical Execution of Work raceway on the left side, a 3-in. There is only one way to prevent damage to fiber optic cable during installation. As you know, such outside plant environments are subject to temperature extremes and the potential for exposure to moisture. Provide rectangular splice boxes with nominal cover dimensions of 30 inches wide by 60 inches long or larger and no less than 36 inches deep. Ultimately, the Authority Having Jurisdiction (AHJ) may dictate the installation requirements of such a practice. Always person must control the cable reel and be prepared for emergency stops. Bonding the telecommunications conduit should improve safety for personnel by reducing touch potential differences in a substation. With a typical fiber cable diameter around 1/2 inch (12mm), the minimum bend radius under tension is 10 inches. Unfortunately, many of these clauses defined in these codes, standards and reference manuals conflict with one another so it is imperative that you review several clauses from various codes, standards and reference manuals, then make your own determination about which guidance to follow. This potentially applies to both optical fiber and balanced twisted-pair cabling. no more than 3-bar of pressure to blow-though the mandrill. The installation shall also conform to 300.4(D) and 300.11. A = pi * d2 / 4, If you are only planning to pull optical fiber cables, a common industry practice is to place the handholes or pull boxes up to 450 m (1500 ft) apart. Outside plant (OSP) fiber optic cable is designed to be pulled into ducts during installation. I think it's more dependant on the length of snake/rope you own AND the length of conductors AVAILABLE - keep in mind, a 300' run of 5 x #10 is no big deal.but a run of 4 x 500KCM on one reel will take some figuring (how are we gonna get off the truck?) Bend radius is very important and more likely to be violated and more likely to damage the cable and the fibers in it.
