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.
Amazon s choice for fiber conduit electriduct 1 4 split wire loom tubing polyethylene corrugated flexible conduit 0 25 inch id orange 100 feet 4 6 out of 5 stars 1 401.
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.
Number of 90 degree turns.
Determining the size of underground pull and junction boxes to meet nec 314 16 code standards is required to prevent damage to conductor insulation.
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Pulling underground fiber optic cable.
A simple way to avoid this is to tie a knot at the pulling end of small fiber optic cables.
How to calculate underground pull box sizing.
At all major fiber optic cable and conduit junctions.
A new fiber optic installation standard.
When installing optical cable what you don t know could really hurt you or damage your cable.
How to calculate underground pull box sizing.
The load is applied to the strength members of the cable rather than the optical fiber.
Conduit centerline shall be aligned within the pull box to facilitate fiber optic cable pulling.
The number of 90 degree turns on a pull shall not exceed 6 for aerial cables and 4 for underground cable in conduit.
And always use a swivel pulling eye because pulling tension will cause twisting forces on the cable.
Browse products like concrete cast pull boxes covers accessories and non metallic pull boxes to find the perfect item for any job or situation.
This device locks onto and tightens around a cable as a tensile load is applied.
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.
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.
3 when additional mechanical force is needed for a pull use external pulling grips.
4 main backbone and lateral fiber cable conduit if installation includes multiple runs of conduit pull rope shall be installed in each individual conduit.
Installed and conduit size shall be as tabulated and shown on the plans.