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.
Fiber optic conduit pull boxes.
The load is applied to the strength members of the cable rather than the optical fiber.
Place pull and splice boxes as shown in the plans and at the following locations unless directed otherwise by engineer.
How to calculate underground pull box sizing.
Installed and conduit size shall be as tabulated and shown on the plans.
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.
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.
Leave enough cable at either end to reach the work area and closet terminating locations.
Browse products like concrete cast pull boxes covers accessories and non metallic pull boxes to find the perfect item for any job or situation.
Pulling underground fiber optic cable.
Determining the size of underground pull and junction boxes to meet nec 314 16 code standards is required to prevent damage to conductor insulation.
And always use a swivel pulling eye because pulling tension will cause twisting forces on the cable.
How to calculate underground pull box sizing.
At all major fiber optic cable and conduit junctions.
The number of 90 degree turns on a pull shall not exceed 6 for aerial cables and 4 for underground cable in conduit.
4 main backbone and lateral fiber cable conduit if installation includes multiple runs of conduit pull rope shall be installed in each individual conduit.
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.
3 when additional mechanical force is needed for a pull use external pulling grips.
A simple way to avoid this is to tie a knot at the pulling end of small fiber optic cables.
When installing optical cable what you don t know could really hurt you or damage your cable.
A new fiber optic installation standard.
Conduit centerline shall be aligned within the pull box to facilitate fiber optic cable pulling.
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