Cable tray systems must only support electrical cables, raceways, and certain specialized electrical equipment intended for the cable management system. 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. en completely installed, without damage either to conductors or structural system use 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. Cable tray systems provide a safe, organized, and flexible method for supporting insulated conductors and cables in commercial and industrial electrical installations. Compliance with these rules is necessary to maintain the integrity of the electrical system and protect personnel.
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