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How do you size OSP conduit?

February 4, 2020

A

How do you size OSP conduit?

As a rule of thumb, make sure the diameter of your duct is at least 1.15 times greater than the diameter of your cable, or one-half trade size larger in diameter than the diameter of the cable you plan to install.

When using pulling eyes, the diameter over the pulling eye becomes the most critical element to sizing conduit.

You can estimate the diameter over the pulling eye (de) to be: de < 1.1 x dc (dc equals the cable diameter). Keep in mind that multiple runs, grade changes and multiple bends can reduce the usable space.

ANSI/TIA/EIA-758, Customer-Owned Outside Plant Telecommunications Cabling Standard, requires the use of a minimum 4 inch conduit.

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