Only distribution pole lines have underbuilt communication cables. Secondary electric are the cables coming out of a transformer, but may still run along the pole line. Besides the use of special cables on transmission and distribution towers or poles, the installation of fiber optic cables for utilities may require the shutdown of electrical distribution for installation, although some installations are possible without shutdown. The first relay system, the LCB current differ-ential relay, that used fiber optics for its channel was introduced in. This article seeks to clarify some details regarding the utility pole wires mentality, focusing on the cables and insulators used for the above poles. As the discussion progresses, displaying the shape design, features/characteristics of the material, and method of application, the reader will have. Most aerial fiber optic cables are installed by lashing to a steel messenger wire strung between poles, but there is a category of cables with special high-strength jacket designs called all-dielectric self-supporting (ADSS) cables. ADSS cables are designed to withstand very high-tension loads.
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