Cable sag results from incorrect spacing of cable tray supports or from employing the incorrect tray type that is, light-duty perforated trays in high-load applications. Complicating the problem are overloaded trays and large unsupported spans. Sagging causes tension at connection points. Under. Cable Tray Installation Spacing plays a huge role in the safety, efficiency, and reliability of electrical systems. But it is an easy fix by paying attention to the real layout and environment in which the cables sit: Keep trays at safe distances from heat and corrosive zones. The following pages address the 2014 National Electrical Code® requirements for cable tray systems as well as design. The bends, tees, crosses, risers and reducers of wire mesh cable tray can be easily and quickly made live at the project by using a bolt cutter. However, improper installation.
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