Ladder trays Trough trays Dedicated trays Solid-bottom trays The correct answer is Dedicated trays. The question is asking about the specific type of cable tray suitable for welding cables. Welding cables are designed for high flexibility and are often used in industrial environments. eferred to support and protect numerous small instrumentation and control cables. 1 Welding cable typically consists of a single, finely stranded conductor that ranges in size from 8 AWG to 500 kcmil and a single layer of. A cable tray system is an essential part of modern electrical installations, designed to support, protect, and organize electrical cables efficiently. 4043 Aluminum: For welding aluminum.