Where is the easiest location to reverse leads in order to change the rotation direction of a 3-phase motor?

The easiest location to reverse leads in order to change the rotation direction of a 3-phase motor is at the motor starter. Reversing the leads at the motor starter typically involves switching two of the three phase wires, which can be done safely and efficiently, as motor starters are designed to manage and control the electrical connections to the motor.

Changing leads at the motor starter is advantageous because it keeps the high-voltage wiring centralized in one location, reducing the need for adjustments directly at the motor or in more complex wiring paths. It also maintains the integrity of the wiring and connections, making maintenance easier and more efficient.

While other locations such as at the motor itself, the junction box, or the overload relay can technically allow for reversing leads, they may not provide the same level of convenience and safety. For example, reversing leads at the motor itself requires accessing the motor connections, which could be more cumbersome and pose safety risks. Similarly, reversing at the junction box or overload relay may involve more intricate wiring changes and potentially impact the operation of protective devices. Thus, the motor starter is designed as the most appropriate and safest location for such adjustments.