A 3-phase, 15 HP, 230/460-volt motor has a nameplate FLA of 38/19. If operated at 230 volts, what is the current flow in each motor winding?

Study for the Independent Electrical Contractors IEC Year 3 Test. Utilize multiple choice questions, each with hints and explanations. Boost your readiness and confidence for the exam!

To understand the current flow in each motor winding when the motor is operated at 230 volts, it's essential to analyze the nameplate Full Load Amperage (FLA) rating provided for the motor. The nameplate indicates that the full load amperage for the motor at 230 volts is 38 amps. This represents the total current draw of the motor when it is operating at its maximum efficiency and load.

In a 3-phase system, the current flow in each winding is typically one-third of the total FLA for balanced loads. However, the nameplate list already provides the specific Full Load Amperage for operation at both voltages. When the motor operates at 230 volts, it draws 38 amps in total, and this is the correct rating for that voltage.

The choice indicating 19 amps reflects the FLA when the motor is run at the higher voltage of 460 volts. Since the question specifically asks for the current flow at 230 volts and references the rated current, the correct interpretation leads back to the full load rating at that voltage.

Therefore, when focusing on this specific scenario of operation at 230 volts, the correct answer confirms that the motor would draw the full load current of 38 amps, while the

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