楼主: 乐林8t
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点评
三相电入户,原接好了照明用电和电梯三相用电。现又从电表箱拉了一根三相电电缆,电缆到50平方听音室后分成三组220V电源分别供音响设备用电。现请教的是接入听音室的三相电如何接漏保和空开?
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