According to the 2013 standard, the maximum thickness of steel cable tray plate is 2. All illustrations, descriptions and technical information included in this document are provided as indications and can cable trays are equivalent. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned. ies aluminum alloys (Aluminum Association designation) to manufacture cable tray. The alloys are selected for their mechanical properties, such as strength and hardness, as well as for their resis ance to corrosion, particularly stress corrosion, cracking, and pitting co anufactured using a. Cable trays play a vital role in supporting electrical cables and wires in commercial, industrial, and utility installations. A properly designed and installed cable tray system will provide. For ladder trays, side rail height and material thickness matter more than rung spacing when it comes to load capacity. 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. Surfaces of system components which are likely to come into contact with cables during installation are inspected to ensure they shall not cause damage to the cables when installed correctly.