With the continuous development of urbanization, the use of galvanized cable bridge can be seen everywhere, whether on the road or in the building. But what do you know about building cable trays? Today, let me explain to you how to select the cable tray inside the building? Hope to help you.

在建筑物内安装电缆桥架，首先要注意电缆桥架和支吊架、引入和引出金属电缆导管都要进行保护接地，且不能少于2处。当允许利用电缆桥架构成接地干线回路时，电缆桥架和支吊架、连接板应能承受接地故障电流，并且满足热效应的要求。作为接地干线的电缆桥架，它的托盘、提价端部之间的连接电阻也有一定的要求。

When installing cable trays in buildings, first pay attention to the protective grounding of cable trays, supports and hangers, incoming and outgoing metal cable conduits, and there shall be no less than 2 places. When the cable tray is allowed to form the grounding trunk circuit, the cable tray, supports and hangers and connecting plates shall be able to withstand the grounding fault current and meet the requirements of thermal effect. As the cable tray of the grounding trunk line, the connection resistance between its tray and the price increase end also has certain requirements.

全线单独敷设接地干线时，干线可采用扁钢，室内敷设面积不能小于60平。在引入引出建筑物时，桥架应注意与建筑物室内接地干线或室外接地装置相连接。如果使用铝合金桥架，应注意桥架上不能用裸铜作为接地干线，这样做是为了防止电化学腐蚀作用。

When the grounding main line is laid separately along the whole line, the main line can adopt flat steel, and the indoor laying area shall not be less than 60 square meters. When introducing and leading out buildings, the bridge shall be connected with the indoor grounding trunk line or outdoor grounding device of the building. If aluminum alloy bridge is used, it shall be noted that bare copper cannot be used as the grounding main line on the bridge to prevent electrochemical corrosion.

对于建筑物内部电缆桥架你知道怎么选择吗?下面看看槽式电缆桥架、节能型有孔托盘以及组合式电缆桥架等。

Do you know how to choose the cable tray inside the building? Let's take a look at trough cable tray, energy-saving perforated tray and combined cable tray.

槽式电缆桥架是比较常见的桥架，它别名有盖无孔型托盘，是全封闭的金属壳体，具有抑制外部电磁干扰，防护外部有害液体和粉尘侵蚀的作用，如果您的使用环境有相关方面的要求，不妨试试这种桥架型式。

Grooved cable tray is a common tray. It is also called covered non perforated tray. It is a fully enclosed metal shell, which can inhibit external electromagnetic interference and protect against external harmful liquid and dust erosion. If your service environment has relevant requirements, you might as well try this tray type.

节能型有孔托盘(即托盘式电缆桥架)和梯级式电缆桥架大多应用在一般情况下，这两类桥架通风散热性良好，能达到节电效果。另外，没有屏蔽要求的控制电缆也可以使用这两种桥架。

Energy saving perforated tray (i.e. tray cable tray) and stepped cable tray are mostly used in general. These two types of trays have good ventilation and heat dissipation and can achieve power saving effect. In addition, these two types of trays can also be used for control cables without shielding requirements.

组合式电缆桥架，别名组装托盘、组合式托盘，在电缆多、荷载重、截面大、具有成片安装固定的空间条件的场所中可以使用这类桥架。一般组装托盘都是单层的，更便于敷线和维护。很多大型配电控制的地下技术夹层中也多使用这类桥架。

Combined cable tray, also known as assembly tray and combined tray, can be used in places with many cables, heavy load, large section and fixed space conditions. Generally, the assembly tray is single-layer, which is more convenient for wiring and maintenance. Many large-scale distribution control underground technology mezzanine also use this kind of bridge.