What type of cable should be used for a 7kw charging pile?
2 Answers
7kw charging piles should use 4 square millimeter copper core cables. Single-phase charging piles are generally 7KW (AC piles) l=P/U=7000/220=32A, and 4 square millimeter copper core cables should be used. The following are precautions when charging a car: Turn off the headlights: When charging, be sure to adjust the headlights to AUTO or turn them off. Moreover, electric vehicles do not have engine idling, so before leaving the car, you must check whether the vehicle power is turned off. Generally, the headlights and low-power electrical equipment in new energy vehicles are powered by the vehicle battery. If they are left on for a long time, the battery can easily discharge, and even if the power battery is fully charged, it will affect the vehicle's startup. Avoid using in-car equipment: When charging an electric car, most owners will stay in the car. If it is summer or winter, owners may think of turning on the air conditioning. In fact, it is possible to turn on the air conditioning while charging, but it is better to avoid it if possible. Using the air conditioning while charging will reduce the lifespan of the battery pack.
Last time I installed a 7 kW home charging pile and learned a lot about cables from the technician. The key is to check the current—7 kW is about 32 amps, and according to safety standards, you need to use 10 square millimeter copper cables, which are quite suitable for distances within 20 meters. I used a national standard 10mm² copper cable, installed a dedicated line into the garage, and added an overload protection circuit breaker to prevent overheating and fires. After using it for over a year daily, the charging has been fast and stable with no issues. I recommend beginners first check local electrical regulations and prepare some PVC sleeves to prevent aging—it’s a cost-effective and safe approach.
