OPAC (optical power attached cable) is a type of fiber optic cable that is installed by attaching to a host conductor along overhead power lines. bles in a high voltage environment, with typical line voltages of 115 kV or more, requires the evaluation of certain critical parameters. Curr ntly, there are a limited number of industry documents that address the requirements for optical fiber cables near high voltage circuits. It is especially attractive for utilities or users of utility right-of-ways to provide a communications link with superior broadband characteristics and low attenuation while maintaining immunity to electromagnetic. Change list- The following is a list of Decisions and Resolutions which authorized statewide general changes to this Order, applicable to all operators of underground systems. While the power lines feeding a Power.