Search results
Results from the WOW.Com Content Network
An optical ground wire (also known as an OPGW or, in the IEEE standard, an optical fiber composite overhead ground wire) is a type of cable that is used in overhead power lines. Such cable combines the functions of grounding and communications .
Fiber cables are generally supported on the lower cross-arms of the tower, which provides good clearance to the ground. When the fibers are installed in the middle of a tower, the fiber cable is unlikely to hit energized conductors. Lower weights and forces are used for installation, compared with metallic cables, so lighter equipment can be used.
It is commonly used to install cables with optical fibers in underground polyethylene ... possible and cost-effective alternative. ... T. "A new fiber optic life for ...
A fiber-optic cable, also known as an optical-fiber cable, is an assembly similar to an electrical cable but containing one or more optical fibers that are used to carry light. The optical fiber elements are typically individually coated with plastic layers and contained in a protective tube suitable for the environment where the cable is used.
Outside plant cabling, whether copper or fiber, is generally installed as aerial cable between poles, in an underground conduit system, or by direct burial. [2] Hardware associated with the outside plant must be either protected from the elements (for example, distribution frames are generally protected by a street side cabinet) or constructed ...
While metal conduit is occasionally used for burial, usually PVC, polyethylene or polystyrene plastics are now used due to lower cost, easier installation, and better resistance to corrosion. Formerly, compressed asbestos fiber mixed with cement (such as transite) was used for some underground installations. Telephone and communications ...
Above-ground lines cost around $10 per 1-foot (0.30 m) and underground lines cost in the range of $20 to $40 per 1-foot (0.30 m). [10] In highly urbanized areas, the cost of underground transmission can be 10–14 times as expensive as overhead. [11] However, these calculations may neglect the cost of power interruptions.
They provide drop connections to customers from fiber distribution networks. These components may be provided in pedestal closures, [ note 1 ] [ 24 ] aerial and buried closures and terminals, or equipment located at customer premises such as a Fiber Distribution Hub (FDH) or an optical network terminal unit.