What connects to the terminals T1, T2, and T3 on a contactor or motor starter?

The terminals T1, T2, and T3 on a contactor or motor starter are specifically designated for load connections. These terminals are where the motor or the load that the contactor is controlling connects to the contactor assembly. When the contactor is energized, it closes the circuit between these terminals, allowing power to flow to the connected load, which is usually a motor in HVAC applications.

Understanding that T1, T2, and T3 are dedicated to load connections is essential because it clarifies their function in the operation of electrical systems. The contactor serves as a switch that manages the flow of electricity to the load, and the terminals provide the necessary points for this connection. The other options relate to different aspects of electrical systems: power supply connections pertain to the source of electricity, control connections relate to the circuitry that activates the contactor, and ground connections are for safety and preventing electrical shock. These functions are separate from the role of T1, T2, and T3, emphasizing their specific purpose in carrying the load current.