Selection of conduit and bridge size

Selection of conduit and bridge size

Regulations: When power cables are laid in conduits, the total cross-sectional area of ​​the conductors in the conduit, including the insulation layer, should not be greater than 40% of the empty cross-sectional area in the conduit.

When power cables are laid in bridges, the total cross-sectional area of ​​the power cables should not be greater than 60% of the cross-sectional area of ​​the bridge

Need to determine: cable cross-sectional area, quantity
-The diameter of a 4mm² photovoltaic cable is about 6mm; the diameter of a 6mm² photovoltaic cable is about 7mm;
-The cross-sectional area of ​​an AC cable can be obtained by checking the cable current carrying capacity table.

导管和桥架尺寸选择

规定：电力电缆在导管内敷设时，管内导线包括绝缘层在内的总横截面积，不应大于管内空截面积的40%。

电力电缆在桥架内敷设时，电力电缆的总横截面积，不应大于桥架横断面的60%

需要确定：线缆横截面积、数量
-光伏电缆4mm²直径约为6mm；光伏电缆6mm²直径约为7mm；
-交流电缆可通过查电缆载流量表得出横截面积。