3孔插座火线插孔有电零线和接地线插孔没电为是不是正常情况 插上插头之后为什么不通电 插座插上任何电器插头之后零线和火线都有电,拔下来就好了,这是...
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这个原因就多了，用电器坏的可能性大，插头接触不良也有可能，零线断也可能！
零线本身就没电压，接地线更不可能有点。家庭用电就是一趟火线有电。
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