AFL CentraCore OPGW (Optical Ground Wire) is preferred for its compact size and ability to house up to 72 fibers in a diameter starting at only 12mm. Its small profile offers an exceptional solution to the diameter and weight concerns on many of today's overloaded transmission towers where an. OPGW is mainly applied in communication line of newly constructed high voltage transmit electricity system with 35 KV or above, or replacement of existing ground wire of previous overhead high voltage transmit electricity system, adding of communication lines and conduction of short-circuit current. OPGW, or Optical Ground Wire, is a self-supporting cable used for the installation of optical fibers on overhead power transmission lines. It consists of lightning protection and high-speed optical communication capabilities within a single unit. The configuration of 48 fibers OPGW allows for. er request. Temperature range: -40 nce values. Specifications are for product as supplied by Prysmian Group: any modification or alteration afterwards of product may give diffe ent. approximations. Please reference the exact cable data sheet for the most up-to-d lable from AFL. Contact customer service for a cable designed to your exact ights reserved.