扁電纜安裝時最小彎曲半徑

Table2 The minimun bend radius of the cable

1、 敷設方式

電纜沒有敷設落差限制。There is no limit of head drop during the cable laying.

電纜允許敷設在室內、室外、空氣中和土壤中，允許局部有積水。

The cable may be laid in indoor, outdoor, air and soil. The cable may be immersed in water locally.

電纜敷設方式可以是隧道、管道、電纜溝、橋架、排管，鎧裝電纜允許直埋地下，鋼絲鎧裝電纜允許垂直敷設。

The cable may be laid in tunnel, pipe, trench, conduit and on cable bridge. The amoured cable can be laid undergroud, and the wire- amoured cable can be laid vertically.

單芯電纜不允許敷設在磁性金屬管內。

The single core cable mustn't be laid in the magnetic metal pipes.

電纜敷設環境應有良好的散熱條件。

The enviroment of cable laying shall be in good heat dissipation condition.

2、 電纜敷設時導體允許牽引力和電纜允許側壓力

The maxium allowed haul-off force and lateral pressure of cable

導體允許牽引力計算方法：he calculating method of the maxium allowed haul-off force :

——銅導體：F=70×S（N/mm2）。

——鋁導體：F=40×S（N/mm2）。

側壓力計算方法：the calculating method of the maxium allowed lateral pressure：

P=F÷R（N/m），允許側壓力不超過3000N/m。the maxium allowed lateral pressure≤3000N/m

式中：F－牽引力，N；lateral pressure

S－導體截面，mm2；conductor section

P－側壓力，N/m；lateral pressure

R－電纜彎曲半徑，m。Bend radius