SC Electrician Practice Questions - South Carolina Electrician Contractor Examination Exam

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A 480Y/277-volt, 75 kVA dry-type transformer in an Anderson mechanical room is a separately derived system. The secondary ungrounded conductors are 3/0 AWG copper. What table is used to size the system bonding jumper?

Table 250.122, based on the secondary breaker Table 310.16, based on secondary ampacity Table 250.102(C)(1) or Table 250.66, based on the derived ungrounded conductors Table 430.250, based on the largest motor

Correct Answer:

Table 250.102(C)(1) or Table 250.66, based on the derived ungrounded conductors

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