What is the switching part of a motor switch referred to as?

The correct choice for the switching part of a motor switch is referred to as the contact block. The contact block is a crucial component within a motor switch because it contains the electrical contacts that open or close the circuit, thus controlling the flow of electricity to the motor. When the switch is activated, the contact block completes the circuit, allowing current to flow to the motor and enabling it to operate.

In contrast, the control panel is the interface where operators control and monitor the equipment, while the power unit refers to the entire assembly that provides power to the system. The relay module typically serves as an intermediary device that uses low power control signals to switch higher power loads, but it does not represent the main switching component in a motor switch itself. Understanding the specific functions of each of these components is essential for electrical troubleshooting and system design in commercial food equipment.