Backfill should meet the following requirements: 1. Fill fine soil first, then ordinary soil, and do not damage the optical cables and other pipelines in the trench. 2 meters (3-4 feet) deep to reduce the likelihood of accidentally being dug up. In extreme cold climates, cables may need to be buried at greater depths where there temperatures are colder and frost penetrates to. The purpose of this document is to specify the procedure for excavation backfilling and trench preparation for installation of 132 kV cables and fiber optic Cables. Roles & Responsibilities Project Manager: Lead all construction activities and enforce strict adherence to all procedures. Standard Residential/Commercial Areas: 24 to 36 inches (60 to 90 cm) deep. After backfilling 300mm of fine soil for optical cables buried in urban or suburban areas, cover them with red bricks for. Optical fibre technology provides a higher capacity data transfer at extremely high speeds, enabling the facilitation of video content on networks. In this context, community or service providers can now supply a wide range of services and applications, such as High Definition TV (HDTV), Video on. ion) and “ Installed” (after installation). The following formulas may be used to determine general guidelines for installing Corning Optical Communications fiber optic cable; however, refer to the cable specifi simply double the minimum working bend radius. Split cable guides and split 40-in.