89 describes the general requirements and a design guide for suspension wires, telecommunication poles and guy-lines that support aerial cables for optical access networks. This Recommendation also describes loads applied to the infrastructures. Understanding Overhead Fiber Optic Cable Overhead fiber optic. There are 2 main laying types for overhead fiber optic cables, hanging under steel strands and self-supporting. Overhead fiber optic cable is. Guy wires of poles supporting high-voltage transmission lines shall meet the requirements for grounding or insulator protection of the National Electrical Safety Code, part 2, entitled “Safety Rules for the Installation and Maintenance of Electric Supply and Communication Lines” (also referred to. Requirements for setting up lightning protection grounding wires: It is particularly required that terminal poles, lead-in poles and 5 poles in front of the bureau must be equipped with direct buried lightning protection grounding wires. The discharge terminal, corner pole, crossing pole, branch. An optical ground wire (also known as an OPGW or, in the IEEE standard, an optical fiber composite overhead ground wire) is a type of cable that is used in overhead power lines. Such cable combines the functions of grounding and telecommunications.