Understanding The Basic Terms
Dead end pole: Dead end pole is a utility pole on which self-supporting form 8 aerial cable or a steel messenger is tensioned and complete into a dead-end fixture.
Messenger span: Messenger span refers to the distance of continuous steel messenger tensioned in the middle of two dead-end poles.
Intermediate poles: Intermediate poles are all the poles in the middle of two dead-end poles.
Planning
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faithful planning and making ready are considerable before any aerial cable installations. While the cable route survey, representatives from all considerable parties along with utilities, road depart, etc should be present. Before even detailed planning begins, approval should be get from all involved parties. Enough clearance for new cable along the right of way should be confirmed While the route survey.
Existing poles should be used whenever potential in order to save cost.
Where on a pole to place the aerial fiber optic cable? Fiber optic cables weigh less than equivalent copper cables and also sag less, so fiber optic cables should occupy the uppermost available communications space on a pole.
Enough clearances must be maintained in the middle of fiber optic cables and electrical power cables on joint-use poles. You need to refer to current National Electrical Safety Code for the permissible clearances.
Existing dead-end pole must be evaluated to see either they can withstand the stresses While aerial cable installation. You have to evaluate either temporary guying is needed in order to relax the temporary unbalanced loading While cable installation.
Splice locations. Splice locations are ordinarily superior While the cable route survey. They are chosen to allow for the longest potential continuous cable spans and a minimum whole of splices. They should be categorically accessible to a splicing vehicle.
Aerial installation should never be done in wet conditions. And make sure all personnel are 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.
Installation:
Fiber optic cable aerial installation can be done in two ways
Lashing a fiber optic cable to a steel messenger
A steel messenger is first installed in the middle of the poles. Then a cable reel trailer and truck are used to pull the cable along the messenger. A cable guide and cable lasher are used to wrap nearby both the messenger and the fiber cable to accumulate the fiber cable to the messenger. Following the cable lasher is an aerial bucket truck which makes considerable adjustments.
At each pole, the fiber optic cable forms an expansion loop to allow for expansion of the messenger. The expansion loop's sizes have both a distance and a depth, its distance should be larger than twice its depth. The fiber cable should also say its minimum bending radius at all times.
Direct installation of self-supporting form 8 aerial fiber optic cables
Self-supporting (Figure-8) optic fiber cables greatly simplifies the task of placing fiber optic cables onto a aerial plant. The self-supporting figure-8 cable incorporates both a steel messenger and the fiber cable into a single jacket of Figure-8 cross section.
The composition of seacoast and optic fiber into a single cable allows rapid one-step installation and results in a more durable aerial plant.
everything You Need to Know About Aerial Fiber Optic Cable installation