What is a 2 Float Switch Wiring Diagram and How is it Used?
A 2 Float Switch Wiring Diagram illustrates how to connect two float switches to a control system, typically a pump or an alarm. These switches are electromechanical devices that change their electrical state based on the position of a float. In a typical setup, one float switch is positioned to trigger an action when the liquid level rises to a certain point, and the other is set to trigger a different action when the liquid level drops to another point. This dual-switch configuration allows for more sophisticated control than a single float switch. The primary function of a 2 Float Switch Wiring Diagram is to create a "dead band" or a specific operating range for the liquid level. This means the system won't constantly cycle on and off with minor fluctuations in the liquid. Instead, it will only activate when the level crosses predetermined thresholds. For example, in a sump pump application:- The upper float switch, when submerged, signals the pump to turn ON.
- The lower float switch, when exposed as the water level drops, signals the pump to turn OFF.
| Component | Connection Point |
|---|---|
| Power Source (Live) | Common terminal of both float switches |
| Upper Float Switch (Normally Closed) | Connected to the motor's ON contact |
| Lower Float Switch (Normally Open) | Connected to the motor's OFF contact |
| Power Source (Neutral) | Connected to the motor |