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What is Outdoor Aerial Fiber Optic Cable ?
April 1, 2022
Aerial fiber optic cable is a type of fiber optic cables that is usually used for outside installation on poles. Due to its installation environment, the design of aerial fiber optic cable must consider to protect it from the destruction of the nature and man-made damage or theft. Aerial cable's laying method is not hard to implement as it can utilize the existing overhead pole line to install that saves more in construction costs and shortens the construction period.
Aerial cables are mainly used for secondary trunk level and below and usually applied to flat terrain or low fluctuation area. They are easily affected by the natural disasters, such as typhoons, ice, floods etc. as well as the influence of an outside force and the mechanical strength weakening in themselves. Therefore, the failure rate of aerial fiber optic cables are higher than the pipeline or directly buried fiber optic cables.
Tips for Aerial Fiber Optic Cables' Installation
When implementing the aerial fiber optic cables' installation, there are always two ways: lashing a fiber optic cable to a steel messenger or direct installation of self-supporting figure-8 aerial cables. There are some tips for better aerial installation.
1. Make clear what Problems we might meet during the installation. The following three points are the mostly common problems:
Dead end pole: Dead end pole is a utility pole on which self-supporting figure 8 aerial cable or a steel messenger is tensioned and terminated into a dead-end fixture.Messenger span: Messenger span refers to the length of continuous steel messenger tensioned between two dead-end poles.Intermediate poles: Intermediate poles are all the poles between two dead-end poles.
2. A perfect Planning solution is necessary before any aerial cable installations:
Preparation: Cable route survey should cover all necessary parties including utilities, street depart, etc. In addition, you should get approval from all involved parties. Sufficient clearance for new cable along the right of way should be confirmed during the route survey.Try to use the possible existing poles in order to save cost and shorten the construction period.Fiber optic cables should occupy the uppermost available communications space on a pole due to the nature of them.Sufficient clearances must be maintained between fiber optic cables and electrical power cables on joint-use poles. In the process, you need to refer to current National Electrical Safety Code for the proper clearances.ou must to evaluate the existing dead-end pole and see whether they can withstand the stresses during aerial cable installation. You have to evaluate whether temporary guying is needed in order to relieve the temporary unbalanced loading during cable installation.Splice locations are chosen to allow for the longest possible continuous cable spans and a minimum number of splices. In addition, they should be easily accessible to a splicing vehicle. This process is usually confirmed during the cable route survey.Aerial installation should never be done in wet conditions. What's more, to ensure safety, all personnel must be properly trained for pole line work.Fiber optic cables (including all-dielectric cables) should be properly grounded when installed in the vicinity of high-voltage power cables.
3. Safety during installation:
To minimize the risks of an accident in the work area, follow the existing rules for setting up warning signs, barricades, manhole guards, and cones.Before pulling cable directly from a figure-8 configuration, make sure that the area inside the loop of the cable (figure-8) is clear of personnel and equipment. Failure to do so may result in injury to the personnel or damage to the cable.Ensure that the tools and equipment used for the cable installation are in proper working order. Improperly functioning equipment may damage cables or cause injury to personnel.Be careful when working near electrical hazards, if electric lines are passing through or near the right-of-way where installation is being performed.Bond all metallic components in the underground system together. At all points where anyone may come in contact with the metallic components of the underground cable system, ground the bonded metallic components to a proper earth ground to avoid electric hazards produced by power lines or any other means.
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