The maximum power of the car charger can reach 3.3kw, and some third-party brands of car chargers can reach 7kw, which has high requirements for the choice of sockets.
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Household wiring standards are roughly as follows:
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Air conditioning circuit -6 square
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Kitchen and bathroom wiring -4 square
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Normal line -2.5 square
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The \"square\" of the wire is not the concept of square meters, but (PI × wire radius), the unit is square millimeters; A flat wire can theoretically support a one-way 3kw device, but this is only the limit standard, if the standard equipment is used for a long time, it can be said that the insulation layer is easy to short-circuit because of high temperature melting. 1 flat copper wire is suitable for the use of equipment below 1.76kw at most, and should not be used for a long time, so the socket of ordinary lights and other equipment can not be used for high-power equipment, especially for car charging.
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However, the minimum household socket should be 2.5 flat, and the limit of 220V voltage can reach 3.6kw, but it is also not suitable for long-term use.
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Due to the need to use high-power equipment such as induction cooker, microwave oven or bath bar, the wire standard used is often higher, some home improvement will choose 6 square wire, but most are only 4 flat; This standard wire can only support high power equipment for a short time, with a maximum load of less than 6kw. However, the home decoration wires are basically dark lines, the heat dissipation effect of the wires in the walls and floors is very poor, and the wires are very easy to high temperature; Therefore, the 4-flat socket can support up to 3.3kw of the car charger, and the high-power car charger is not reliable enough.
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The measured 4-flat wire used about 5kw of equipment for a long time, and the insulation layer melted and short circuit was caused in a few days.
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6 flat is almost the highest standard in the household wire, theoretically 220V can support up to 8kw or so of the equipment, which can be used with high power car charging; Only when using or pay attention to observe the temperature of the wire, the general cabinet air conditioning socket will use 6 square lines, feel the temperature of the wire harness in the leakage protection of the entry position, the warm feeling is no problem, if some hot you can not use close to 7kw car charger, otherwise it is still possible to burn the wire harness.