Duct Installation Of Fiber Optic Cable

Duct cable can be hand pushed or pulled in via tape string into a micro duct.

Duct installation of fiber optic cable.

Ducts and innerducts should be sized to meet present and future cable installation requirements. Loose tube cables can be blown jetted or pulled into a duct or conduit that will protect the cable during its installed lifetime. Cable blowing is the process of installation of optical fiber cable into a pre installed duct. Proper size and installation of the innerduct is critical for ease of cable installation.

The most commonly deployed dielectric outdoor cable design with fiber counts from 2 to 288 fibers and up to 432 fibers for gel filled. General precautions should always be applied when. 1 micro ducts can also be placed directly into larger telecommunications conduits or can be factory assembled into a composite unit of multiple micro ducts. Rodding is used to clear the duct passage and install the pulling rope using fiberglass pushrods.

Generally there are two approaches for optical cable installation. Three 1 25 inch inside diameter i d innerducts can usually be pulled into a 4 inch duct. Testing fiber optic cable on the reel all optical fiber cables must be tested while on the reel prior to deployment. Most micro duct fiber cable products have a tension limit of 300 lbs or lower versus 600 lbs for typical outside plant fiber cable.

Table 1 commonly used cable types for various osp applications underground cable innerduct micro ducts. Underground direct installation directly buried installations are most common for long cross country installations. As compared to the duct the installation process is relatively very quick. Compressed air is injected in the duct inlet after few hundred meters of cable is pushed into the duct.

Innerduct is a way to subdivide the duct and to provide for future cable pulls. Installing cable is a time consuming and expensive process so it is important to ensure the cable is good before installation. Installation crews must use blowing equipment specifically designed and tested for micro duct fiber cable to avoid damage to the cable. Micro duct cable is blown jetted into the micro duct.

In underground fiberoptic cable installation cables can be buried directly in a trench or placed into a buried duct. The ducts and innerducts should be kept free of debris and maintained watertight at all times. Normally standard size fiber optic cables are pulled into innerduct sub ducts. Innerduct is available in ribbed corrugated and smooth.

Preparations for duct installation using an air blowing method. The most common cables used for this type of installation are steel armored outdoor fiber cables. Duct installation of fiber optic cable installation methods of fiber optic cable into duct.