Cable trays are robust, open metal frames that are employed to contain a significant amount of wires simultaneously. You either go for conventional electrical pipes (or conduits)or the more ultramodern cable trays. This choice depends upon a lot of factors. This keeps the wires cool, and this prevents the wires from breaking and. A cable tray is an open system used to store and manage cables in a tray with open pores or mesh in the bottom, allowing easy ventilation and thus preventing the overheating of cables. These are designed with stainless steel or fiberglass and aluminum to enhance their long use and easily uphold in. Answer: No.