Important Points for Duct Planning and Laying➤If, underground duct structure will be very costly, like in mountainous places, another alternative s can be studied to be used as aerial network.
Duct Laying in Cities➤Under the sidewalk, especially if the construction precedes the laying of the sidewalk, is usually an excellent location.
Duct Laying in Rural Areas and Highway➤The above mentioned locations are applicable but the designer should assure himself that the duct is not likely to be involved in street widening.
|Separation table between duct,OFC and other utilities|
Ducts Type Used in Telecom Network
➥Fiber Reinforced Epoxy (FRE).
➥Polyvinyl Chloride (PVC)
➥Polyethylene Corrugated (PEC).
➥Sub-Ducts & Mini Ducts.
|PEC Duct used in telecom sector|
Optical Fiber Cable Laying Technique
|Manual cable laying|
Unidirectional Pulling of Optical Fiber CableIf the pulling wire is to be used, verify that it is continuous throughout the pull.At the reel-end manhole, install the cable conduit feeder. Attach the pulling wire or winch line to the cable using the pulling hardware configurations.Verify that the set screws are well tightened on the central strength member of the cable.
Bidirectional Pulling of Optical Fiber Cable
This technique of cable laying requires equipping the cable with a pulling eye at each end.Locate the cable reel at the designated pull through man- hole. The length of cable remaining on the reel is uncoiled and laid on the ground in a large figure of eight (8). Site engineers must be confirm that the minimum bending radius of Optical Fiber Cable is not exceeded.
Optical Fiber Cable Laying by air blowing
|Cable Laying by air blowing technique|
Optical Fiber Cable Laying by floatingWe know that most outdoor plant underground cables are in contact with water in a major part of their life, floating is an alternative way that can be used for the laying of optical fiber cable. Floating can be arranged using machinery designed to blow originally: the air is simply replaced with water. Compared to blowing, floating makes it possible to keep cable in the duct for a long time without an intermediate access point.
|Floating technique for for cable laying|