What low voltage might electrical control systems use?

Electrical control systems typically utilize low voltages for safety and operational efficiency. The use of 12 or 24 volts AC is common in control systems because these voltages are considered low risk, reducing the potential for severe electric shock or other hazards when working with the equipment.

Using these voltages allows for safer operation and simpler design in various applications, such as lighting controls, HVAC systems, and industrial automation. Additionally, the lower voltages can mitigate issues related to voltage drops over long cable runs, making it easier to manage electrical signals and maintain reliable operation across various devices.

In contrast, higher voltages like 120 volts AC, while common in general electrical systems, pose greater shock hazards and are typically reserved for power distribution rather than control applications. Other options such as 9 volts AC and 30 volts AC can be used in specific situations, but they are less common compared to 12 and 24 volts. This makes 12 or 24 volts AC the standard choice in most low voltage electrical control systems.