单选题:TT系统中,漏电保护器额定漏电动作电流为100mA,被保护电气装置的外露可导电部分与大地间的电阻不应大于下述哪一项数值?

题目内容:
TT系统中,漏电保护器额定漏电动作电流为100mA,被保护电气装置的外露可导电部分与大地间的电阻不应大于下述哪一项数值?(  ) A.3800Ω
B.2200Ω
C.500Ω
D.0.5Ω

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