If a 3-phase motor is connected to power but is not rotating in the desired direction, how can the rotation be changed?

To change the rotation direction of a 3-phase motor, it's important to understand that this can be done by altering the phase connection of the motor. The most common method is to switch any two of the three power leads connected to the motor. This effectively changes the phase sequence and consequently the direction of rotation.

The first method, making changes in the motor terminal box, is a practical approach since the connections to the power supply are typically accessible there. By swapping two of the motor leads within the terminal box, the motor will rotate in the opposite direction.

The safety switch can also be involved in this process. If the wiring configuration allows, manipulating connections at the safety switch may achieve the same effect by altering the phase sequence presented to the motor. However, it’s generally not as common to make changes here as at the motor terminal box.

Changes can also be attempted at the circuit breaker, provided that it's designed for such adjustments. Again, this would involve swapping the connections providing power to the motor, which can influence the rotation direction.

Thus, the option indicating that any of these locations can affect the motor's rotation direction is correct, allowing flexibility in the method chosen for this adjustment.