Large motors are usually operated at

• A. 110 V
• B. 440/480 V
• C. 12 V
• D. 12,000 V

Answer: (B)

Large motors are designed to run on higher three-phase voltages. Operating at a higher voltage means the motor can deliver the same power with a smaller current, which reduces conductor and equipment size, losses, and cost. In industrial settings, 440 to 480 volts is the common standard for large motors. Lower voltages like 110 V or 12 V are typical for small devices or control circuits, not for large motors, and 12,000 V is a transmission-level voltage not used for standard motor operation in facilities. So 440/480 V is the typical operating voltage for large motors.