3 when additional mechanical force is needed for a pull use external pulling grips.
Fiber optic conduit pull boxes.
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Pulling underground fiber optic cable.
Calculating the correct size of pull box needed can be complicated so please feel free to contact us or call 800 767 1576 if you need.
Number of 90 degree turns.
After pulling fiber optic cable cut off approximately 10 feet of cable from the pulling end to remove any portion of the cable that may have been stretched or damaged during installation.
A simple way to avoid this is to tie a knot at the pulling end of small fiber optic cables.
Installed and conduit size shall be as tabulated and shown on the plans.
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The load is applied to the strength members of the cable rather than the optical fiber.
The number of 90 degree turns on a pull shall not exceed 6 for aerial cables and 4 for underground cable in conduit.
Special fiber optic blocks should be used on all turns or angles.
At all major fiber optic cable and conduit junctions.
Approximately every 2 500 feet for fiber optic cable applications in rural areas with any continuous section of straight conduit if no fiber optic cable splice is.
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Determining the size of underground pull and junction boxes to meet nec 314 16 code standards is required to prevent damage to conductor insulation.
4 main backbone and lateral fiber cable conduit if installation includes multiple runs of conduit pull rope shall be installed in each individual conduit.
How to calculate underground pull box sizing.
Familiarizing yourselfwith standard 301 is a smart step to avoid such problems up until a little over a year ago an installation standard for optical cable didn t exist.
Conduit centerline shall be aligned within the pull box to facilitate fiber optic cable pulling.
How to calculate underground pull box sizing.
This device locks onto and tightens around a cable as a tensile load is applied.
Leave enough cable at either end to reach the work area and closet terminating locations.
Place pull and splice boxes as shown in the plans and at the following locations unless directed otherwise by engineer.
