【Daily Topic】【Electrical Edition 20160908】
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Participation reward: 2 Wealth. Reward for correct answer: 9 Wealth. The PEN conductor in TN-C and TN-C-S systems must meet the following conditions ( ). A. It must be insulated for the highest voltage it might encounter. B. Conductive parts outside the device, used as a substitute for the PEN conductor. C. In the TN-C-S system, the PEN conductors are not allowed to be connected to each other again starting from the separation point. D. Gas pipes are used as grounding wires and protective wires. Correct answers: AC
AC~~~~~~~~~
AC
A. Insulation must be provided against the highest voltage that may be applied. C. In the TN-C-S system, the PEN conductors are not allowed to be connected to each other again starting from the separation point
The PEN conductor in TN-C and TN-C-S systems must meet the following conditions (AC). A. It must be insulated for the highest voltage it might be exposed to. B. Conductive parts outside the device, used as a substitute for the PEN conductor. C. In the TN-C-S system, the PEN conductors are not allowed to be connected to each other again starting from the separation point. D. Gas pipes are used as grounding wires and protective wires
In the C.TN-C-S system, the PEN conductors are not allowed to be connected to each other again starting from the separation point