Light-duty applications, such as LAN or control wiring in commercial spaces, may require trays with 1. The thickness of the tray depends on how frequently it is supported. Wider trays are typically preferred over deeper ones for power and solar DC runs to reduce cable stacking and heat concentration. Perforated (also called trough) cable trays. Cable tray (or cable ladder) systems are a popular alternative to electrical conduit systems, as they have an outstanding record for dependable service, design flexibility and cost savings in commercial and industrial applications. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned in this technical guide only apply to our own cable management ranges and cannot under any circumstances be transposed to si osure, overheating or. ies aluminum alloys (Aluminum Association designation) to manufacture cable tray.