Cable trays simplify the wiring system design process and reduces the number of details. A spread sheet based wiring management program may be used to control the cable fills in the cable tray. s as grounding conductor equipment. In accordance with National Electrical Code (NEC) Article 392 “Cable trays” first determine the Maximum Fuse Ampere Rating or Circuit Breaker Ampere Trip Setting or Circuit Breaker Protective Relay Ampere Trip Setting for Ground-Fault Protection s the minimum. nch runs from the main cable tray system to electr cal devices or other equipment. It is available with a ventilated or solid bottom. It is used to manage cables. Cable tray types, fill rules for single-conductor and multiconductor cables, ampacity derating, separation requirements, and when to use tray vs conduit. Cable trays are used as an alternative to open wiring or electrical conduit systems, and are commonly used for cable management in. With the RS 60 cable tray installation system, we offer you the last installation type of the standard support construction, so that you can implement all installations required in the building project with circuit integrity maintenance on the basis of the standard support construction.