The recommended depth should be not less than 50% of the OPGW. Optical Ground Wire (OPGW) cables must comply with a range of international and local standards to perform effectively in their dual roles. These standards, including IEEE 1138-2009 3, IEC 60793-1 4, IEC 60793-2 5, and IEC 60794-1-1 6, ensure that the cables meet necessary safety and performance. Recommendation ITU-T L. 151 refers to the installation of optical fibre ground wire cable. It deals with the factors that should be considered in determining the characteristics of this type of cable, the apparatus that should be used, the precautions that should be taken in handling the reels, and. This standard covers the performance, test requirements, procedures, and acceptance criteria for a transmission line overhead ground wire (a. shield wire, static wire, earth wire, skywire) with optical. according to the line, length, and pre-reserved joint position, checks the relevant data,masters the composition of the entire communication system and the detailed configuration and connection mode of each substation (including installation methods and specific positions from terminal poles to. The requirement includes the design, supply, stringing and splicing of OPGW cable on 400KV, 220KV & 132KV Transmission Towers. This specification defines the design, material, performance and test requirements for fibre optic cable to support the fibre optic telecommunication needs.