Among the terminal box connection drawings shown, which diagram is correctly drawn for a 9-lead, wye-wound, dual-voltage motor connected to low (240V) voltage?

The correct diagram for a 9-lead, wye-wound, dual-voltage motor connected to low voltage (240V) is based on the appropriate arrangement of the leads in the wye configuration.

In a wye configuration for a dual-voltage motor, the nine leads consist of three phase leads and three neutral leads. When connecting for low voltage, the correct approach entails connecting the motor leads so that the phases are properly tied to their respective lines while ensuring that the neutral is correctly positioned to maintain the integrity of the motor's winding configuration.

The representation in the correct diagram accurately indicates how to connect the motor to utilize three windings for the incoming line voltage of 240V. It demonstrates that the motor should be set up such that each winding is connected to the power source in the correct manner to achieve the desired low-voltage operation. This ensures that the motor can operate efficiently and safely at the specified voltage level, optimizing performance and preventing potential electrical issues.

The other diagrams may not reflect the appropriate setup for a 9-lead wye-wound motor at low voltage, either by misconfiguring the connections or incorrectly representing the connection between windings and the power source. Therefore, the configuration in the selected diagram effectively illustrates