The pathway is the plan, the trays and conduits are the buckets which contain the wires. Each system offers unique benefits depending on the environment, cable load, and future accessibility. Learn about their design, applications, advantages, and ideal use cases for efficient cable management. Two of the most common methods. Ladder rack (also known as “ladder trays” or “cable ladders”) are one of the most common types of cable runway. Cables can enter and exit anywhere along the. In the electrical wiring of buildings, a cable tray system is used to support insulated electrical cables used for power distribution, control, and communication.