1. Possible defects: all parts of the bridge show the appearance of short circuit, which may cause the current relay operation on the distribution cabinet, and the damage to the bridge is very serious;

2.会呈现的毛病：桥架内部呈现短路，这类毛病通常是因为电缆质量低质而形成的，外表上不会流露痕迹;

2. Problems that may occur: there is a short circuit inside the bridge, which is usually caused by the low quality of the cable, and there is no trace on the surface;

3.可能会呈现整条电缆被烧断或许某处电缆被烧断，使得电缆在毛病处损坏的十分严峻;

3. It may appear that the whole cable is burnt or some cable is burnt, which makes the cable damage at the fault very serious;

4.可能会呈现的毛病为桥架只有一条短路，毛病处电缆损坏较轻，但还是会有很明显的痕迹。

4. The possible problem is that there is only one short circuit on the bridge, and the cable at the fault is slightly damaged, but there are still obvious traces.

5.这类毛病可能会呈现的原因在于电流太大或许电缆质量太差而形成的。

5. This kind of problem may occur because the current is too high or the cable quality is too poor.

6.在电缆桥架布线时，其电缆不应有黄麻或其他易延燃材料外护层。

6. When the cable tray is used for indoor wiring, the cable shall not have jute or other combustible materials.

7.在有腐蚀或特别潮湿的场所采用电缆桥架布线时，应根据腐蚀介质的不同采取相应的防护措施，并宜选用塑料护套电缆。

7. When cable tray is used for wiring in corrosive or especially humid places, corresponding protective measures should be taken according to different corrosive media, and plastic sheathed cables should be selected.

8.电缆桥架（托盘）水平安装时的距地高度一般不宜低于2．50m，垂直安装时距地1．80m以下部分应加金属盖板保护，但敷设在电气专用房间（如配电室，电气竖井、技术层等）内时除外。

8. When the cable tray (tray) is horizontally installed, the height from the ground should not be less than 2.50m, and when it is vertically installed, the part below 1.80m from the ground should be protected by metal cover plate, except when it is laid in the special electrical room (such as distribution room, electrical shaft, technical floor, etc.).

9.电缆桥架水平安装时，宜按荷载曲线选取跨距进行支撑，跨距一般为1．5～3m。垂直敷设时，其固定点间距不宜大于2m。

9. When the cable tray is installed horizontally, the best span should be selected according to the load curve for support, and the span is generally 1.5~3m. When laying vertically, the spacing between fixed points should not be greater than 2m.

10.几组电缆桥架在同一高度平行安装时，各相邻电缆桥架间应考虑维护、检修距离。

10. When several groups of cable trays are installed in parallel at the same height, the maintenance and repair distance between adjacent cable trays shall be considered.

11.在电缆桥架上可以无间距敷设电缆，电缆在桥架内横断面的填充率：电力电缆不应大于40％；控制电缆不应大于50％。

11. Cables can be laid on the cable tray without spacing, and the filling rate of the cross section of the cable in the tray: the power cable should not be greater than 40%; The control cable shall not be more than 50%.

12.下列不同电压，不同用途的电缆，不宜敷设在同一层桥架上：如受条件限制需安装在同一层桥架上时，应用隔板隔开。

12. The following cables with different voltages and different purposes should not be laid on the same layer of bridge: if they need to be installed on the same layer of bridge due to conditions, they should be separated by partitions.