Yangzhou Qianyuan Electric Equipment Manufacturing & Trade Co.Ltd.
It should be installed at two levels, and should have the function of electricity leakage protection of classification and subsection. The first level leakage protection is arranged in the switch box, the rated leakage current is not more than 30mA, and the operation time of the rated leakage shall be less than 0.1s. Another level of leakage protection should be located in the main distribution box.
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