NM CID ES-3 Practice Questions - New Mexico CID ES-3 Low Voltage Special Systems (Under 50 Volts) Examination Exam

A shielded isolation transformer is used on a sound or data rack primarily to:

Break common-mode noise and ground-loop paths between the primary and secondary Increase the secondary current available to Class 2 loads Convert the circuit from Class 2 to Class 1 automatically Replace the need for an equipment grounding conductor

Correct Answer:

Break common-mode noise and ground-loop paths between the primary and secondary

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