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Engine_2014 : Electricity - 2160/2299
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Which of the listed sections of an emergency switchboard is used to supply power for alarm signals under emergency conditions?
A) The generator and bus transfer section
B) The 450 volt, 60 cycle, 3 phase bus
C) The 120 volt, 60 cycle, 3 phase bus
D) The 24 volt DC bus
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