1. When cable tray wiring is adopted indoors, its cable shall not have outer sheath of jute or other easily combustible materials.

2、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。

2. When cable tray wiring is used in places with corrosion or especially damp, corresponding protective measures shall be taken according to different corrosive media, and plastic sheathed cables shall be selected.

3、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。

3. The height from the ground of cable tray tray and horizontal installation shall not be less than 2.50m generally, and the part below 1.80m from the ground during vertical installation shall be protected by metal cover plate, except when it is laid in electrical rooms such as power distribution room, electrical shaft, technical floor, etc.

4、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。

4. When the cable tray is installed horizontally, the 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.

5、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。

5. When several groups of cable bridges are installed in parallel at the same height, the distance between adjacent cable bridges shall be considered for maintenance and overhaul.

6、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％。

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

7、下列不同电压，不同用途的电缆，不宜敷设在同一层桥架上：1、lkV 以上和 1kV 以下的电缆。2、同一路径向一级负荷供电的双路电源电缆。3、应急照明和其他照明的电缆。4、强电和弱电电缆。如受条件限制需安装在同一层桥架上时，应用隔板隔开。

7. The following cables with different voltages and purposes should not be laid on the same tray: 1. Cables above 1kV and below 1kV. 2. Two way power cables with the same path supplying power to the primary load. 3. Cables for emergency lighting and other lighting. 4. Strong and weak current cables. If it is required to be installed on the same layer of bridge due to limited conditions, it shall be separated by partition.

8、电缆桥架与各种管道平行或交叉时，其小净距应符合表 DQ4-1 的规定。

8. When the cable tray is parallel or crossed with various pipes, the small clear distance shall comply with the provisions in Table DQ4-1.

9、电缆桥架不宜安装在腐蚀性气体管道和热力管道的上方及腐蚀性液体管道的下方，否则应采取防腐、隔热措施。

9. The cable tray should not be installed above the corrosive gas pipeline, thermal pipeline and below the corrosive liquid pipeline, otherwise anti-corrosion and thermal insulation measures should be taken.

10、电缆桥架内的电缆应在下列部位进行固定。垂直敷设时，电缆桥架的上端及每隔 1．50～2m 处。水平敷设时，电缆的首、尾两端、转弯及每隔 5～10m 处。 电缆桥架与各种管道的小净距 表 DQ4-1 管道类别平行净距m交叉净距m、一般工艺管道 0.40.3 具有腐蚀性液体或气体、管道 0.50.5 热力管道有保温层 0.50.5 无保温层 1.01.0

10. The cables in the cable tray shall be fixed at the following positions. When laying vertically, the upper end of the cable tray and every 1.50~2m. When laying horizontally, the head and tail ends of the cable, turns and every 5-10m. Table of Small Clear Distance between Cable Tray and Various Pipelines DQ4-1 Parallel Clear Distance of Pipeline Category m Cross Clear Distance m, General Process Pipelines 0.40.3 Corrosive Liquids or Gases, Pipelines 0.50.5 Thermal Pipelines with Thermal Insulation Layer 0.50.5 No Thermal Insulation Layer 1.01.0

11、电缆桥架内的电缆应在首端、尾端、转弯及每隔 50m 处，没有编号、型号及起、止点等标记。

11. The cables in the cable tray shall be at the head end, tail end, turn and every 50m without number, model, starting and ending points and other marks.

12、电缆桥架在穿过防火墙及防火楼板时，应采取防火隔离措施。

12. When the cable tray passes through the firewall and fire floor, fire isolation measures shall be taken.