The fibers are grouped in bundles of 12 with color-coded threads denoting the different bundles. ;The standard color sequence (Blue, Orange, Green, Brown, etc. UV curable acrylate material is applied over fiber cladding as optical fiber primary protective coating. The metallic wires provide. This specification covers COMCAST® OPGW for the installation on high voltage overhead power lines. FIBER OPTIC CABLE Fiber Optic Cable © 2002. ace unit for optical fibres. Application ranges from aerial, uct to buried. The Central Tube Optical Ground Wire (OPGW) is surrounded by single or double layers of aluminum clad steel wires (ACS) or mix ACS wires and aluminum alloy wires, 24 Core OPGW Cable design is fully adapted to the most common electric line needs. High quality standards for designing, testing and.