单选题:关于公路工程施工现场临时用电基本原则的描述错误的是(  )。

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  • 题目类型:单选题
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题目内容:
关于公路工程施工现场临时用电基本原则的描述错误的是(  )。 A.必须采用TN—S接地系统
B.必须采用接零保护系统
C.必须采用两级配电系统
D.必须采用两级漏电保护和两道防线

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