Cable trays are often treated as an afterthought, which leads to issues like insufficient space or improper routing of cables. Solution: Assess the cable load, tray size, and future expansion needs during the design phase. 07-20-2016 09-10-2016. 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. Under. 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. Short circuits occur in all phases of the cable, which will also trigger the interlocking reaction of the current relays and voltage relays on the distribution cabinet.
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