Of course, they aren't just hanging there. They are fastened to the walls of the tunnel by a variety of cable brackets and hangers, some may even be lying in perforated metal troughs or in cable containment. Designing for applications Those brackets have been. Ellis Patents Galvanised Steel Cable Hanging Systems are cable hangers manufactured from mild steel and hot dipped after manufacture to BS EN ISO 1461:1999. Network Rail and TfL (LUL) Approved Rail. J hangers are ideal for installing multi-core or bundled communications on long horizontal runs, such as tunnel installations. The cable. ass reinforced polyester) cable trays. These solutions provide optimum safety, flexibility and excellent corrosion resistance for ety lighting, signs, ventilation, etc. With legrand at your side, you are choosing safety, high quality, expertise and a variety of solutions to ensure that your. Look out of the window as your train passes through a tunnel and what do you see? “Not a lot,” could be the answer, but if your window is close to the tunnel wall and the light shines out from the carriage as it does in the London Underground, you'll see lines and lines of cables hanging from the. The galvanised steel suspension hooks and cable hangers produced by Ellis Patents Ltd have been used in the railway industry, both overground and underground, for many years.