Direct sources of non grounded neutral networks.In the case of the shell without reducing the neutral pressure source, the distribution of the box shell, the distribution, the dynamics, and the device shell conductive particles are connected together in the network.Do not repeat the ground in the necessary position, along the line pen.Do not break the pen can not be in any case.Not with a pen cross slot, pipe or installed in the iron magnetic, structural steel, because the induction effect can almost increase the line assembly
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