The installation of cable trays in substations plays a vital role in ensuring organized, safe, and efficient routing of power and control cables. Cable trays provide a strong mechanical support system while maintaining accessibility for inspection, maintenance, and future. Substations Committee of the IEEE Power Engineering Society Approved 8 March 2007 IEEE-SA Standards Board Abstract:The design, installation, and protection of wire and cable systems in substations are covered in this guide, with the objective of minimizing cable failures and their consequences. Installing a 35KV substation cable tray correctly is important. Are you worried about mistakes, safety, or just how to get started? I know the feeling. Getting this kind of work right, especially with high-voltage equipment, needs a clear, step-by-step plan. Some of the areas that should be considered when using a cable tray in either. maintain spacing or to keep cables in place when the tray is ect the minimum bend ra-dius for cables as they exit the bottom of the cable tray. A rung spacing of 6 to 9 inches (150 to 230 mm) is preferable when the cable tray cont d for instrumentation and control applications that require. Cable tray (or cable ladder) systems are a popular alternative to electrical conduit systems, as they have an outstanding record for dependable service, design flexibility and cost savings in commercial and industrial applications. 305(a)(3), or comparable standards promulgated by States.