Power special optical cable generally refers to OPGW (optical composite ground wire), OPPC (optical composite phase wire), MASS (metal self-supporting optical cable), ADSS (all-dielectric self-supporting optical cable), ADL (phase/ground bundled optical cable) and. Power special optical cable generally refers to OPGW (optical composite ground wire), OPPC (optical composite phase wire), MASS (metal self-supporting optical cable), ADSS (all-dielectric self-supporting optical cable), ADL (phase/ground bundled optical cable) and. Types of power special optical cable and field optical fiber Power special optical cable generally refers to OPGW (optical composite ground wire), OPPC (optical composite phase wire), MASS (metal self-supporting optical cable), ADSS (all-dielectric self-supporting optical cable), ADL (phase/ground. 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. Electrical utilities have several. Fiber optic cables consist of glass wires, each capable of transmitting digital data modulated into light waves. They effectively send information encoded in a beam of light through a glass or plastic tube. A key advantage of fiber optic cables over metal conductor cables is their superior. OPGW is primarily used by the electric utility industry, placed in the secure topmost position of the transmission line where it “shields” the all-important conductors from lightning while providing a telecommunications path for internal as well as third party communications. FCC | RoHS | CE | Critical to Quality Inspection Power Line Fiber Optic.