When connected to a high-voltage circuit, the line current of a dual-voltage motor is:

When a dual-voltage motor is connected to a high-voltage circuit, the line current is less than it would be on a low-voltage circuit due to the principles of electrical power and the relationship between voltage, current, and power in a circuit.

Power (P) in a motor can be expressed using the formula P = V x I, where V is the voltage and I is the current. For a given power rating of the motor, if the voltage increases (as it does when switching from a low-voltage to a high-voltage circuit), the current must decrease to maintain the same amount of power. This is because a higher voltage allows for the same power to be delivered with less current flowing in the circuit.

In practical terms, this means that when the motor is operating at a higher voltage, it will draw less current compared to when it operates at a lower voltage, provided the motor's power output remains unchanged. This principle is crucial for understanding the efficiency and design of electrical systems, selecting appropriate conductors, and ensuring that equipment is operated within its safe limits.