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Académie
Electrical
NFPA 70E Qualified Electrical Worker
Special Topics - DC Systems, Engineering Controls & Emergency Response
Vérification des connaissances
Special Topics - DC Systems, Engineering Controls & Emergency Response
Vérification des connaissances
Vérification des connaissances
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Why are DC arc flash hazards considered more difficult to manage than AC?
A
DC systems always have higher voltage
B
DC arcs produce more light but less heat
C
DC arcs have no natural current zero crossing, making them harder to extinguish
D
DC systems do not require protective devices
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