Regularly inspect: Check for signs of damage, corrosion, or wear. Clean and maintain: Keep trays and supports free from debris and moisture. Monitor environmental conditions: Address temperature, humidity, or. Cable tray failures can cause operational disruptions, equipment damage, and safety risks. This guide discusses common cable tray problems, from loosening and corrosion to grounding issues and installation errors, along. 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. Sagging causes tension at connection points. Under. The entire cable line is completely burned or one of the phases is damaged, causing all the current relays on the distribution cabinet to activate.