SC Burglar Alarm Practice Questions - South Carolina Burglar Alarm Contractor Examination Exam

How does a Class 3 circuit differ from a Class 2 circuit in the NEC safety model?

Class 3 is considered safe from fire initiation but can present an electric-shock hazard, so higher-voltage-rated cable is required Class 3 has no VA limit and may operate at 600 volts Class 3 may be mixed freely with power conductors Class 3 applies only to optical-fiber cable

Correct Answer:

Class 3 is considered safe from fire initiation but can present an electric-shock hazard, so higher-voltage-rated cable is required

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