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For a switchboard rated 480 volts, the voltage requirement for the 1-second dielectric test is _ and the voltage requirement for the 1-minute dielectric test

For a switchboard rated 480 volts, the voltage requirement for the 1-second dielectric test is _ and the voltage requirement for the 1-minute dielectric test is _ a) 1000, 1960 b) 1960, 2352 c) 2352, 1960 d) 3000, 1000

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