What is indicated by the terminal marked as 'A' in a common terminal identification?

In a common terminal identification, a terminal marked as 'A' typically indicates that it serves as the common terminal. The common terminal is an important point in a circuit where multiple connections come together, often acting as a reference point for voltage levels or as a return path for electrical current. This designation is critical in various electrical configurations, where it may connect to control elements or serve as a return route for multiple components within refrigeration systems.

The identification of the common terminal is essential for ensuring proper connections and functionality of the equipment. Understanding which terminal is the common allows technicians to avoid incorrect wiring, which could lead to malfunctions. Recognizing the common terminal helps in troubleshooting and maintaining the systems effectively.