Both 2 Way and 3 Way switches are SPDT switches. But 3 Way switches have an extra pin called Grounding pin, which is not present on 2-way switches. 2 Way Switches have 3 screws, whereas 3 Way Switches have 4 screws. But irrespective of that, in both cases, you can employ 2 switches to control the load.
Do you need a special switch for a 3 way switch?
The key ingredient is a special type of switch called a “three-way” switch. Youll need two of them, one to replace the existing switch and another for the new switch location. With these, youll have the convenience of turning a light on and off from two spots.
Can I replace a 3 way switch with a single pole?
To convert a 3-way switch to single pole, one of the traveler wires is removed from the switch. In order for a 3-way switch to function as a single pole, the wires need to be connected to the common and one of the traveler terminals. 3-way switches can be converted to single pole in several configurations.
How is a 2 way switch wiring?
5:087:18Two Way Switching Explained | How to Wire a 2 Way Light SwitchYouTube