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.

电缆桥架伸缩节指的是可伸缩式调节的节点，能够按照其安裝需求来调节不一样的长度。

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

电缆桥架伸缩节主要用作电缆敷设，电缆碰到房屋建筑的伸缩缝、沉降缝有振动的特殊环境时起到缓冲，避免出现电缆移位、扭曲、被拉断的损失，保证电缆畅通。

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.

金属的热胀冷缩十分严重，要是不用伸缩节的情况下会出问题的，不仅仅是电缆桥架，供暖的主管道，PVC的主下水管道，镀锌的铁皮热力管道等等这些，要是受溫度影响的都会有伸缩节。

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.