For fiber optic cable, use horizontal finger style with front cover cable managers in a 1U or 2U footprint. Consider wide body cabinets (wider than 24 inches) along with vertical cable managers (4”, 6” or 12” wide) for core cabinets, main patch cabinets, or. Where reels are supplied with protective material fitted over the cable, the protection should remain in place until the cable will be installed. During installation, all curvatures should be smooth. Turn-backs and all sharp changes of direction. This guide assists you in the selection of the appropriate tray to guard these lines. The most important rule is to maintain a bend radius that is 20x cable diameter. While there are several specific types of listings for power cables, specifically for tray. best environment for proper functioning of your CABLExpress cables. and our own experience! center hardware layout design. Innerduct provides a good way to identify fiber optic cable and protect it from damage, generally a result of someone cutting it by mistake! You can get the innerduct with pulling tape already installed. A rung spacing of 6 to 9 inches (150 to 230 mm) is preferable when the cable tray cont d for instrumentation and control applications that require.