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

2、在有腐蝕或特別潮濕的場所采用電纜橋架布線時，應(yīng)根據(jù)腐蝕介質(zhì)的不同采取相應(yīng)的防護(hù)措施，并宜選用塑料護(hù)套電纜。

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、電纜橋架托盤、水平安裝時的距地高度一般不宜低于 2．50m，垂直安裝時距地 1．80m以下部分應(yīng)加金屬蓋板保護(hù)，但敷設(shè)在電氣專用房間如配電室，電氣豎井、技術(shù)層等、內(nèi)時除外。

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、電纜橋架水平安裝時，宜按荷載曲線選取跨距進(jìn)行支撐，跨距一般為 1．5～3m。垂直敷設(shè)時，其固定點間距不宜大于 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、幾組電纜橋架在同一高度平行安裝時，各相鄰電纜橋架間應(yīng)考慮維護(hù)、檢修距離。

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、在電纜橋架上可以無間距敷設(shè)電纜，電纜在橋架內(nèi)橫斷面的填充率：電力電纜不應(yīng)大于 40％；控制電纜不應(yīng)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、下列不同電壓，不同用途的電纜，不宜敷設(shè)在同一層橋架上：1、lkV 以上和 1kV 以下的電纜。2、同一路徑向一級負(fù)荷供電的雙路電源電纜。3、應(yīng)急照明和其他照明的電纜。4、強(qiáng)電和弱電電纜。如受條件限制需安裝在同一層橋架上時，應(yīng)用隔板隔開。

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、電纜橋架與各種管道平行或交叉時，其小凈距應(yīng)符合表 DQ4-1 的規(guī)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、電纜橋架不宜安裝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(yīng)采取防腐、隔熱措施。

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、電纜橋架內(nèi)的電纜應(yīng)在下列部位進(jìn)行固定。垂直敷設(shè)時，電纜橋架的上端及每隔 1．50～2m 處。水平敷設(shè)時，電纜的首、尾兩端、轉(zhuǎn)彎及每隔 5～10m 處。 電纜橋架與各種管道的小凈距 表 DQ4-1 管道類別平行凈距m交叉凈距m、一般工藝管道 0.40.3 具有腐蝕性液體或氣體、管道 0.50.5 熱力管道有保溫層 0.50.5 無保溫層 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、電纜橋架內(nèi)的電纜應(yīng)在首端、尾端、轉(zhuǎn)彎及每隔 50m 處，沒有編號、型號及起、止點等標(biāo)記。

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、電纜橋架在穿過防火墻及防火樓板時，應(yīng)采取防火隔離措施。

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