【Daily Topic】【Electrical Edition 20170113】

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This post was last edited by yuchenchf on 2017-1-18 at 12:43. Reward for participation: 2 Wealth. **Correct answer: 9 Wealth. The ( ) metal parts of electrical equipment and electrical production facilities do not need to be grounded. A. Supports inside battery rooms with a nominal voltage of 10 kV or less. B. Equipment installed on grounded metal frameworks (it is necessary to ensure good electrical contact). C. The enclosures of electrical measuring instruments, relays, and other low-voltage electrical devices installed on distribution panels, control panels, and electrical distribution units, as well as insulated metal bases that do not generate dangerous voltages when damaged and supported properly. D. The enclosures of electrical equipment with an alternating current nominal voltage of 380 V or less and a direct current nominal voltage of 220 V or less, in dry rooms with poor conductive floors such as wood or asphalt. BC