When we lay cables on the cable bridge, in order to ensure safety, we should follow certain principles, such as: the following different voltages, different uses of cables, should not be laid on the same bridge.

1、lkV以上和1kV以下的電纜。

1. Cables above lkV and below 1kV.

2、同一路徑向一級負荷供電的雙路電源電纜

2. Dual power supply cables supplying power to primary load in the same path

3、應急照明和其他照明的電纜。

3. Cables for emergency lighting and other lighting.

4、強電和弱電電纜。

4. Strong and weak electric cables.

5、如受條件限制需安裝在同一層橋架上時，應用隔板隔開。

5. If the condition restricts the installation on the same deck, the partition shall be applied.

6、電纜橋架與各種管道平行或交叉時，其小凈距應符合表DQ4-1的規定。

6. When the cable bridge is parallel to or intersected with various pipelines, the minimum net distance shall be in accordance with Table DQ4-1.

7、電纜橋架安裝不宜安在腐蝕性氣體管道和熱力管道的上方及腐蝕性液體管道的下方，否則應采取防腐、隔熱措施。

7. Cable bridge erection should not be installed above corrosive gas pipeline and thermal pipeline and below corrosive liquid pipeline. Otherwise, anti-corrosion and heat insulation measures should be taken.

8、電纜橋架內的電纜應在下列部位進行固定。垂直敷設時，電纜的上端及每隔1．50～2m處。水平敷設時，電纜的首、尾兩端、轉彎及每隔5～10m處。

8. The cables in the cable bridge shall be fixed at the following parts. When the cable is laid vertically, the upper end of the cable and every 1.50-2 m place. When laying horizontally, the first and last ends of the cable, turning and every 5-10 m place.

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