Best practices for routing are as follows: use dedicated trays, conduits or ducts for network cables; route cables away from high-voltage equipment whenever possible; maintain consistent bend radius to avoid damaging shielding; and if multiple cables run together, ensure bundles are. Best practices for routing are as follows: use dedicated trays, conduits or ducts for network cables; route cables away from high-voltage equipment whenever possible; maintain consistent bend radius to avoid damaging shielding; and if multiple cables run together, ensure bundles are. Below are the key principles to guide the layout of E&I cable trays, focusing on practical, safety, and efficiency aspects. Separation of Electrical and Instrumentation Cables Electrical on Top, Instrumentation Below: Typically, electrical trays are positioned above instrumentation trays. These rules shall be applied in the cabling engineering workflow for all subjects concerning or in relationship with cabling in the ITER facility. Not respecting. Cable Types: Only use conductors rated for open-air environments, such as Tray Rated (Type TC) or Metal-Clad (Type MC) cables. Prohibited Areas: Cable trays cannot be. 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. Copyright © 2008 by the Institute of Electrical and Electronics Engineers, Inc. Cable tray, introduced in the mid 1940s, is a safe.