The metal mesh tray system is ideal for environments where cleanliness, ventilation, and fast installation are essential. For a long time, wire mesh trays sat in a narrow corner of the cable management world. Useful, yes, but mostly limited to IT rooms or small control setups. The wire mesh lining of these cable trays allows the routing of very small-diameter cables such as the. What are Wire Mesh Cable Trays? A wire mesh cable tray, also called a wire cable tray or mesh cable tray, is a type of cable support system used to route and protect electrical and communication cables.