Aluminum: Resists corrosion; excellent strength-to-weight ratio. Cable trays support insulated electrical cables in industrial and commercial settings. Learn about ladder, perforated, solid-bottom, wire mesh, and channel trays in this complete guide. This guide will help you choose the best cable tray. Below are the top 7 types of cable trays and their applications, along with their key advantages. Applications: Power plants and substations, Heavy. 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.