An OPGW cable contains a tubular structure with one or more optical fibers in it, surrounded by layers of steel and aluminum wire. The conductive part of the cable serves to bond adjacent towers to earth ground, and shields. AFL AlumaCore OPGW (Optical Ground Wire) is preferred for its central aluminum pipe and color-coded fiber optic buffer tubes which simplify the splicing process while providing optimum fiber protection as well as long term product reliability. Optical Ground Wire (OPGW) is a dual functioning cable. Protective Tubing: Steel tube, aluminum-input, or aluminum pipe enclosing the fibers.
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