The low-voltage system of intelligent buildings typically consists of multiple information monitoring and communication facilities, such as BA (Building Automation), OA (Office Automation), CA (Communication Automation), and other corresponding systems. Cable trays are categorized into trough-type, tray-type, and ladder-type structures, composed of supports, brackets, and installation accessories. When selecting the type, attention should be paid to whether all components of the cable tray meet the requirements of serialization, generalization, and standardization as a complete set. Inside buildings, cable trays can be independently installed or attached to various structures and pipe rack supports. They should feature a simple structure, aesthetic appearance, flexible configuration, and easy maintenance. All components must undergo galvanization treatment. For cable trays installed outdoors on buildings, especially in coastal areas or corrosive environments, the materials must be corrosion-resistant and moisture-proof.