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

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An ES-3 technician drives a new ground rod for a telephone protector 40 feet from the service and leaves it unbonded to the electrical grounding-electrode system. What is the principal hazard?

The telephone pair will carry too much DC loop current A large potential difference can appear between communications equipment and grounded power equipment during a lightning or power-fault event The Class 2 cable insulation voltage rating will be exceeded in normal operation The protector will not pass a 25-ohm megohmmeter test

Correct Answer:

A large potential difference can appear between communications equipment and grounded power equipment during a lightning or power-fault event

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