【Daily Topic】【Electrical Edition 20160920】
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Participation reward: 2 Wealth. Reward for correct answer: 9 Wealth. When ground fault protection is used, within a building, which of the following can be used as a common equipotential connection? A. PE and PEN main lines B. The working neutral wire of the electrical equipment grounding electrode C. Metal pipes in buildings such as water pipes, gas pipes, heating, and air conditioning pipes D. Metal components and conductors in buildings, as well as the connections of metal pipes in potential bonding systems, which must be reliably connected for electrical conduction. Correct answer: AC
B. The working neutral wire of the electrical installation’s grounding electrode C. Metal pipes in buildings such as water pipes, gas pipes, heating, and air conditioning pipes D. Metal components and conductors in buildings, as well as the connections of metal pipes in potential bonding systems, must be reliably connected for electrical conduction
D. Metal components of buildings, conductors, etc., as well as the joints of metal pipes in potential bonding, should be reliably connected for electrical conduction