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Electrical
NFPA 70E Qualified Electrical Worker
Equipment Labeling & Maintenance
Knowledge Check
Equipment Labeling & Maintenance
Knowledge Check
Knowledge Check
1 / 10
How does faster protective device clearing time reduce arc flash incident energy?
A
Clearing time has no effect on incident energy - only fault current matters
B
Faster clearing reduces the duration of the arc event, and since incident energy is the product of power and time, shorter duration means less total energy released
C
Faster clearing increases current, which improves arc extinction
D
Faster clearing reduces fault current, which reduces incident energy
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