SC Public Utilities Electrical Practice Questions - South Carolina Public Utilities - Electrical Contractor Examination Exam

H1 and X1 markings on a distribution transformer identify which terminals?

The tank ground lugs only The instantaneous-polarity ends of the primary and secondary windings The high-voltage and low-voltage bushings that must never be used together The internal fuse and secondary breaker terminals on a CSP unit

Correct Answer:

The instantaneous-polarity ends of the primary and secondary windings

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