This is the main component of blowing machine and it pushes the cable into the hdpe duct with the help of compressed air. Osp fiber optics civil works guide 2015 joe botha and the fiber optic association, inc. Towards the cable landing station a, one end of the cable is paid out by the cable ship and landed. The foa and neca national electrical contractors association in 2001 cooperated to develop the first ansi standard american national standard covering the installation of fiber optic cable plants. Laying device towed by the vessel construction progress, and make all kinds of cable through the work instructions. Failing to follow such a procedure can result in fibercable damages or high optical power losses after installation. Connect the otdr to one end of a launch cable may also be called a dead band cable. An innerduct provides an efficient use of conduit space, a clean low coefficient of friction path and an added measure of mechanical protection for the fiber optic cable. Like all standards, this document only offers guidelines for design, installation and testing of fiber optic networks.
For direct buried fiber optic cables, it is recommended that, route be ripped, so that obstacles can be identified and removed and the placing operation precautions during installation and back filling shall be in accordance with the requirements of saest628 and saest629. Aerial fiber optic cable overview and installation guide fs. Fibre optic cable laying vetter gmbh kabelverlegetechnik. Adherence to a simple cable pulling procedure, including the use of specific tools designed for the purpose, can assist you in handling fiber optic cables in premises wiring. During final bending the cable can, therefore, be bent more tightly. Optical fiber cable pulling is generally preferred in access networks where underground ducts pipes are not continuous for more than 200 to 300 meters and cable needs to be stored in coil. For direct burial installations, the cable should lie flat in a trench, free of any large stones. Installing fiberoptic cable in premises applications.
Adherence to a simple cablepulling procedure, including the use of specific tools designed for the purpose, can assist you in handling fiberoptic cables in premises wiring. Tension during laying of the cable particular attention must be paid to the maximum possible tension. The methods used to place fiber optic cables in ducts are similar to those used to place copper cable. Installation guide for optical fibre cable edition 05. Risks of inhaling fumes or of allergic reactions to chemicals used to prepare and process optical fibres. If fibre optic cable is installed in the same tray as copper ones, always place the copper cables below. Very low pulling forces our jet devices enable tensionfree cable blowingin. Documenting the installation properly will facilitate installation, allow better planning for upgrading, simplify testing and.
Conduct a thorough site survey prior to cable placement. Never look directly through the end of fiber cables till you ensure that there is no light source at the other end. During rare cable laying events, vessels must follow a precise. Kcs is realizing the construction of cable laying with high quality and high reliability by performing the followings. Purpose the procedure describes the recommendations for installation and delivery of opgw fiber optic cables.
Aerial fiber optic cable installation is complicated and timeconsuming on account of considerations on natural destruction and manmade damages before installation. The submarine fiber optic cable contains the same components as a land cable, except it has more protection. Make sure that for all drawings and schedules necessary approvals are available. Hands on video training presentation for osp fttx project deployment and activities. Fiber laying techniques home gepon, fiber optic media. In premises applications, fiber optic cables can be used as the backbone cabling in a standard structured cabling network, connecting network hardware in the computer roommain cross connect. Before laying the cable, check whether the cable ends have been correctly. Dec 28, 2016 below is given the method statement for performing the installation of optical fiber cabling system for a project. However, some general observations can be made on the situations most often encountered in pulling and terminating this medium for a cable pulling procedure, see pulling fiber optic cable, page 44. Up until a little over a year ago an installation standard for optical cable didnt exist.
Automated figureeight machines that coil fiber optic cable on a drum may exceed cable design limits by exceeding torsion, tension, and bend radii limitations. In this method, the optical fiber cable can be pulled by hand or using a cable pulling winch at every chamber location. Specification standard optical fiber backbone cabling 27 23 the university of new mexico, november 17, 2010 page 4 of 16 optical fibers, unless otherwise specifiedand approved by unm it. Record for future reference the cable identification markings, which consist of sheath number, footage, and cable description codes printed on the cable outer sheath. Underground utilities standards address safety and access rights, selection of the utility, and the continued maintenance of the utility once fiber has been installed.
The method is given from receiving the material on the installation site and what to do after that. Dec 23, 2016 i worked on a cable laying ship for a while, it was good fun. Blowing equipment for standard fibre optic cables o 934 mm. The foa reference for fiber optics fiber optic installation. Underground installation of optical fiber cable by pulling. The traditional method of laying optical fibers still used in most developing countries is ducting and trenching. You should pull on the fiber cable strength members only. Blowing equipment for minicables and microcables o 0,812 mm. After cable pulling is completed and testing has done, inspection to proceed for cable laying, cable tiles and backfilling. The swivel must have a 600 pound breakaway pinto prevent pulling damage to the cable.
The methods described are intended for guideline use only, as it is impossible to cover all the various conditions that may arise during an installation. The owner, contractor, designer or installer is always responsible for the work involved. During the cable laying process, the cable is being constantly tested to ensure that no damage has occurred to it. Generally speaking, they are usually made of heavy jackets and strong metal or aramid strength members. However, some general observations can be made on the situations most often encountered in pulling and terminating this medium for a cable pulling procedure, see pulling fiberoptic cable, page 44. A fiber optic cable, also known as an optical fiber cable, is an assembly similar to an electrical cable, but containing one or more optical fibers that are used to carry light. Documentation of the fiber optic cable plant is an integral part of the design, installation and maintenance process for the fiber optic network. Do not use automated figureeight machines when installing fiber optic cables with a central tube design or any loose tube cable having one or more layers of corrugated steel armor. Units for inhouse installation of cable o 0,84,0 mm. Do n cable than sp allow it to kin can alter the t cable the ca 3. During this phase, the balloon buoys are attached along the cable to prevent possible damages to the cable.
Fiber laying is a specialized discipline that has to be performed by trained and experience personnel. Optical submarine cable laying method laying procedure. Cable blowing is the process of installation of optical fiber cable into a preinstalled duct. Cleaning fiber optic cables and connectors there are multiple ways to clean fiberoptic cables and connectors. The necafoa 301 standard is unique in the standards world as it was written by contractors and installers for contractors and installers to provide guidelines on how fiber.
Underground utility standards astm underground utilities standards include standard practices for installing and operating optical fiber systems and repair of sewer systems. The optical fiber cable blowing machine are of 2 types. Included below are some helpful tips to properly clean fiber optic cables. The cable is laid to conform to the contours of the seabed to avoid cable lying in suspension. No matter what type of aerial fiber cable is, the cable installation procedure is similar. Exact minimum bending radii for specific cables can be found in the information sheets of the cable manufacturer.
Bose solo 5 tv soundbar sound system with universal remote control, black 7325221110. Ship constantly going forward, and then washed with water a ditch next robot will be placed in cable, then use underwater robot to sediment red back cover cable, and then continues to advance, when the connections are needed when the board first, then complete the and then sealed, and then continue laying. Introduction and classification of aerial fiber optic cables aerial fiber optic cable refers to a kind of fiber optic cable that is designed and used for outside plant osp installation between poles by being lashed to a wire rope messenger strand with a small gauge wire. Direct buried fiber optic cable installation practices are essentially the same as those used for placing copper cable. This guide is generic yet contains sufficient specific information applicable for most installations of adss cable. Documenting the installation properly will facilitate installation, allow better planning for upgrading, simplify testing and future moves, adds and changes. A guideline for laying of cables and installation of sleeves. The installer shall have documented procedures for the. Deploying a fiber optic physical infrastructure within a converged plantwide ethernet architecture fiber optic cabling systems overview figure 3 permanent link diagram the typical channel is composed of multiple assemblies connected by a combination of the optical fiber connectors on the cable assemblies ma ting into adapters. Safety procedure optical fiber cable issued august 20. The cable should never be bent below its minimum bending radius.
The traditional method of laying optical fibers still used in most. At the end of the cable lay, a final splice is made to join the cable ends together to make a connection between the cable stations. Underground installation of optic fiber cable placing stl tech. When installing optical cable, what you dont know could really hurt you or damage your cable. Tools and equipment needed should be in good condition and must be checked by supervisor prior to usage in the construction area.
Underground fiber optic cable installation youtube. I worked on a cable laying ship for a while, it was good fun. For termination length, figure on about 2 to 3 meters of additional cable beyond where the terminal will be mounted. Doing so can result in bending losses andor breaks in the cables fibers. For the love of physics walter lewin may 16, 2011 duration. Optical fiber cable pulling is generally preferred in access networks where underground ducts. Animation by global marine the fundamental problems are. Underground cables digging trenches to bury fiber optic duct underground fiber optic cable installation.
How undersea internet fiber optic cables are laid on the ocean floor march 5, 2019 submarine cords are laid down by utilizing speciallymodified ships that lug the submarine cable on board and slowly lay it out on the seabed as per the strategies offered by the wire operator. The demands placed on the laying equipment are also constantly on the rise. Lay according to preengineered method of procedure using shipboard slack management software so cable lays flat on the seabed and in the engineered and surveyed location. Method of laying submarine cables fiber optic cable. Pulling procedure shift the cable drum at the centre location of pulling the route length so that bidirectional pulls are possible by laying the cable into large figure8 shapes loops on the. Scope this document covers the installation of opgw fiber optic cables, including transport. The long term transmission characteristics of optical. The hydraulically blowing machine consists of 2 parts. Cfo 301 standard for installing and testing fiber optics management, security or fire alarm systems, or any other communications link.
Underground installation of optic fiber cable placing. Blowing method cable installation by using high speed air flow combined with additional mechanical pushing force is called as blowing or jetting. In this application note, cable installation by blowing method and its best practices are explained. Like all standards, this document only offers guidelines for design, installation and. F or purpose of deciding the depth at which the cable is to be laid a rocky.
The amount of additional optical fiber cable needed for splicing depends on site conditions, splicing method used, and longrange plans for cable usage. The lashing of fiber optic cable is done using two methods the stationary method and the moving reel method. Machines generally do not apply underwater cable laying equipment. Aerial fiber optic cable overview and installation guide. Buried cable installation best practices 1 fosco connect. This recommendation describes the socalled microtrench ing technique, that allows installing optical cables at a shal low depth, in small grooves. Fiber optic cables have kevlar aramid yarn or a fiberglass rod as their. Method statement for optical fiber cable installation project. Notes do not allow the end of the fiber optic cable to make contact with any surface including fingers. The optical fiber elements are typically individually coated with plastic layers and contained in a protective tube suitable for the environment where the cable will be deployed. D1210, minjie plaza, huangpu, guangzhou, guangdong, china. Method of laying submarine cables news fiber optic cable. Smoking should not be allowed around fiber optic work.
Osp fiber optics civil works guide the fiber optic association. Cable preparation and pulling procedure best practices for. Each used different procedures, tools and even cables. Amazonbasics cl3 rated optical audio digital toslink cable 25 feet. The quality and performance of fibre optic cables are constantly changing. Fiber optic termination tutorial we terminate fiber optic cable two ways with connectors that can mate two fibers to create a temporary joint andor connect the fiber to a piece of network gear or with splices which create a permanent joint between the two fibers. On the basis of surveys, general permission from road and rail authorities for laying the optical fiber cable along the decided routes and permission for rail road crossings will have to be obtained. How undersea internet fiber optic cables are laid on the.
With the stationary method, the cable is pulled into place using cable blocks, while the moving reel method employs reel carrying vehicles on the entire route of the fiber. When using an optical tracer or continuity checker. Oct 25, 2010 for the love of physics walter lewin may 16, 2011 duration. Our longterm experience and knowledge in the cable and fibre business ensures. Generally the minimum bending radius of a fiber cable under load is 20. Fiber optic cables have kevlar aramid yarn or a fiberglass rod as their strength member. Failing to follow such a procedure can result in fiber cable damages or high optical power losses after installation. This procedure assumes the cable has not been connectorized prior to pulling.
Handle the fiber optic splinters similar to glass splinters. A fiberoptic cable, also known as an opticalfiber cable, is an assembly similar to an electrical cable, but containing one or more optical fibers that are used to carry light. Optical cable is a high capacity transport medium that is sensitive to excessive pulling force, tight bends, and crushing forces, therefore, proper care must be taken during the. Installation of optical fiber cable by blowing jetting.
This video presents the fiber optic cable laying on underground application. A cross section of the shoreend of a modern submarine communications cable. All dielectric self supporting adss fiber optic cable. Familiarizing yourselfwith standard 301 is a smart step to avoid such problems.
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