Cable tray is composed of support, bracket and installation accessories. It can be erected independently or laid on buildings or pipe racks. It is a building material that can protect cables from external factors and ensure the safety of our daily power consumption. They can be seen in underground parking lots, shopping malls, supermarkets and other places. Do you know what is cable tray expansion joint and what is its purpose? Today, the cable tray manufacturer will explain to you.

電纜橋架伸縮節指的是可伸縮式調節的節點，能夠按照其安裝需求來調節不一樣的長度。

The cable tray expansion joint refers to the node with telescopic adjustment, which can adjust different lengths according to its installation requirements.

電纜橋架伸縮節主要用作電纜敷設，電纜碰到房屋建筑的伸縮縫、沉降縫有振動的特殊環境時起到緩沖，避免出現電纜移位、扭曲、被拉斷的損失，保證電纜暢通。

The expansion joint of the cable tray is mainly used for cable laying. When the cable touches the expansion joint and settlement joint of the building, it plays a buffer role in the special environment of vibration, so as to avoid the loss of cable displacement, distortion and breaking, and ensure the smooth flow of the cable.

金屬的熱脹冷縮十分嚴重，要是不用伸縮節的情況下會出問題的，不僅僅是電纜橋架，供暖的主管道，PVC的主下水管道，鍍鋅的鐵皮熱力管道等等這些，要是受溫度影響的都會有伸縮節。

The thermal expansion and cold contraction of metal are very serious. If expansion joints are not used, there will be problems, not only cable bridges, main heating pipes, PVC main sewer pipes, galvanized iron sheet heat pipes, etc. if they are affected by temperature, there will be expansion joints.