Cable trays are support systems used to hold and organize electrical cables and wires in buildings and industrial settings. They provide a safe and efficient way to manage cable installations, reducing the risk of damage and ensuring easy access for maintenance. Typically made from materials like steel, aluminum, or plastic, cable trays come in various designs, including ladder, perforated, and solid-bottom types. They are often installed along walls or ceilings, allowing for better airflow and reducing heat buildup, which can prolong the life of the cables they support.