Ji'nan cable bridge load is very small, you can also choose four single-phase cable (3 phase line, 1 ground wire), you should say, "separate into the line."".
These are according to the use of the distribution box, such as lighting distribution box, power distribution box and so on, also consider providing power supply and distribution box installed at the distance, distance and total current small can use 4 single-phase cable, if the distance, or suggested the use of three-phase cable from the start safety angle.
A simple distribution box includes a main switch and multi branch switch, the main switch is for power line connection, and the upper mouth as the power supply and power switch branch branch switch connecting the branch switch mouth can be connected with electric equipment.
As the total power supply, the cross sectional area of the cable is selected according to the total sum of the current in each branch of the distribution box, so that it should be the thickest cable in the distribution box.
Of course, choose to enter the line cable, more use of four core (three-phase, ground) three-phase cable, as you said, "thick section of the line."".
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