Circular arc tee is a specialized diversion and turning accessory for cable tray wiring systems, suitable for mainstream tray models such as trough, ladder, and tray. It is widely used in strong and weak current wiring projects such as industrial electromechanical, commercial buildings, data rooms, and municipal power. It is mainly used for horizontal diversion, branch routing, and direction adjustment of lines. The product adopts an integrated circular arc streamline structure design, which changes the rigid corner of traditional right angle tees, making the transition of cable branches smoother and more natural, effectively avoiding problems such as excessive cable bending, outer skin wear, and core wire compression, and greatly improving the safety factor of wiring. The arc tee structure is stable, with standardized dimensions and high degree of docking and fitting. It is easy and convenient to install on site and suitable for various construction scenarios. The overall wiring is transparent and orderly, with no dust accumulation or dead corners, and excellent heat dissipation conditions. It not only ensures the long-term stable operation of electrical circuits, but also facilitates later line inspection, maintenance, and expansion and renovation. It is a high-quality supporting accessory for modern refined and standardized electromechanical wiring.