The Trench MDT150TR is a 150mm wide pre-galvanised medium duty cable tray 3m length used to support electric power and communication cables that are used for power distribution and communication. In practice, cable tray dimensions are a system of interrelated measurements —width, depth, length, and material thickness—that directly affect cable fill compliance, heat dissipation, structural loading, and long-term expandability. 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. This 150mm cable tray trapeze bracket is a fully pre-assembled suspension kit designed for fast and reliable installation of tray containment systems. Built from pre-galvanised steel, it's ideal for supporting cable trays in commercial and industrial environments where quality, speed, and stability. 7. 2 Do horizontal and vertical trays need to be different sizes? Cable trays vary in size in order to accommodate varying numbers of wires. International projects are most often made in widths of between 50mm and 900mm and depths of between 50mm and 150mm.