Rodding is used to clear the duct passage and install the pulling rope using fiberglass pushrods.
Duct installation of fiber optic cable.
Table 1 commonly used cable types for various osp applications underground cable innerduct micro ducts.
Innerduct is a way to subdivide the duct and to provide for future cable pulls.
Underground direct installation directly buried installations are most common for long cross country installations.
Installing cable is a time consuming and expensive process so it is important to ensure the cable is good before installation.
Generally there are two approaches for optical cable installation.
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.
The most common cables used for this type of installation are steel armored outdoor fiber cables.
Installation crews must use blowing equipment specifically designed and tested for micro duct fiber cable to avoid damage to the cable.
Duct installation of fiber optic cable installation methods of fiber optic cable into duct.
In underground fiberoptic cable installation cables can be buried directly in a trench or placed into a buried duct.
The pushing force is applied mainly near the cable inlet by a pushing device.
General precautions should always be applied when.
Proper size and installation of the innerduct is critical for ease of cable installation.
Ducts and innerducts should be sized to meet present and future cable installation requirements.
Cable blowing is the process of installation of optical fiber cable into a pre installed duct.
Preparations for duct installation using an air blowing method.
The most commonly deployed dielectric outdoor cable design with fiber counts from 2 to 288 fibers and up to 432 fibers for gel filled.
Loose tube cables can be blown jetted or pulled into a duct or conduit that will protect the cable during its installed lifetime.
Normally standard size fiber optic cables are pulled into innerduct sub ducts.
After the fiber optic cable is installed into a duct or innerduct end plugs should be installed to provide an effective water seal.
Most micro duct fiber cable products have a tension limit of 300 lbs or lower versus 600 lbs for typical outside plant fiber cable.
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.
Micro duct cable is blown jetted into the micro duct.
Compressed air flows at high speed through the duct and along the cable.
Duct cable can be hand pushed or pulled in via tape string into a micro duct.
The ducts and innerducts should be kept free of debris and maintained watertight at all times.
