SC Electrician Practice Questions - South Carolina Electrician Contractor Examination Exam

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The same 75 kVA, 480-volt primary transformer is protected on the primary only under Table 450.3(B) (primary 9 A or more). What is the maximum standard inverse-time breaker permitted for the primary?

90 A 100 A 110 A 125 A

Correct Answer:

125 A

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