Answer :
According to NEC 110.9, switches and fuses must have Interrupting capacity not less than the available short-circuit current at their supply terminals.
What is interrupting Capacity?
Interrupting Capacity is the fault conditions current that a circuit breaker may stop without causing the circuit breaker to fail.
According to NEC 110.9, switches and fuses must have Interrupting capacity not less than the available short-circuit current at their supply terminals.
Hence the correct answer for the blanks is Interrupting .
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