Correctly select the specifications of electric vehicle charging cables

China [CN]

Charging piles are now a very common energy supplement equipment, but there are still many people who don’t know how many square cables are needed to install charging piles. The thickness of the wiring harness of the charging pile cannot be uniformly discussed. It is mainly determined by the charging pile’s power storage capacity and the voltage that the wiring harness bears when circulating electricity. In general, the wires of the charging pile are much thicker than other wires. The following introduces how to choose the appropriate specification cable when installing the charging pile.

Charging piles are divided into single-phase and three-phase. Regardless of whether it is two-phase or single-phase, it must first be converted to the AC incoming line current. For single-phase charging piles (AC charging piles), I=P/U; for three-phase charging piles (DC charging piles), I=P/(U*1.732). From this, it can be concluded that the cable should be selected according to the current size. (Cable selection can refer to relevant manuals or regulations), single-phase charging piles are generally 7KW (AC charging piles) I=P/U=7000/220=32A, and 4 square millimeters of copper core cables should be used; three-phase charging piles (DC piles) 15KW current 23A cable 4 square millimeters; 30KW current 46A cable 10 square millimeters; 60KW current 92A cable 25 square millimeters; 90KW current 120A cable 35 square millimeters;

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