While low voltage cable trays are designed for signal and data cables, high voltage cable trays are built to carry cables with higher power capacities. Understanding their key differences will ensure that you select the right tray for your specific needs, improving efficiency, safety, and longevity. A power-limited tray cable (PLTC) is covered by Article 725 and is a factory assembly of two or more insulated conductors rated at 300 volts, enclosed in a non-metallic jacket. PLTC-type cable is suitable for various applications and is commonly referred to as an “everything cable. ” While PLTC-type. Tray cables are an integral part of electrical systems in industrial, commercial and utility environments. It is available with a ventilated or solid bottom. They include: and other cables, including those specially approved for installation in cable trays.