If the socket has no grounding line, or poor grounding, the use of the home portable charging gun sent by the car will not charge the problem. Attach a thin wire to the corner above the socket, and use a piece of steel to nail it into the dirt or iron pipe, lightning rod, etc. (The ground line is the line directly connected to the earth, which can also be called the safe return route, and it transfers the high pressure directly to the earth when it is dangerous, which is a lifeline)
The car charger is not grounded should not be a problem, as long as it is not charged in a thunderstorm.