What is 2 Way Switch | 2 Way Switch Wiring | The Definitive Guide The wiring diagram of the three-wire 2-way switch is as follows. In the case of digital electronics, the configuration of three-wire two-way switch wiring is similar to that of the EX-OR gate. One Gang Two Way Switch Wiring: When a bulb is controlled by two switches, a gang 2-way switch is used. Whose figure is as follows. Basic Electrical Parts & Components of House Wiring Circuits Apr 07, 20189. Two Way Switches. Two way switches are the last electrical part explained in this article. It’s a bit different than the normal wall switches in terms of how it operates. These switches are used to operate a light from two different places. Normal wall switches only has 2 connections, while Two Way switches got 3 connections.