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Where, 0 represents the OFF condition and 1 represents the ON condition. How to Connect 2-way Switch Wiring using Three wire control. This is the new method to make a 2-way switching connection as it is slightly different from the two wire control method. This method is commonly used now days as it is efficient than the Two Wire control system. The cable consist of a black wire, a white wire and a bare copper wire. Black wire = Power or Hot wire. White wire = Neutral. Bare copper = Ground. When wiring a 2-way switch circuit, all we want to do is to control the black wire (hot wire) to turn on and off the load. Key to types of switch. 2 way light switch with power feed via switch. 2 way light switch with power feed via light. 2 way light switch with power feed via switch (two lights) 3-way light switch with power feed via the light switch. Three way light switch with power feed via the light. A 2 Way Switch Wiring Diagram with Power Feed from the Switch light The power source comes from the fixture and then connects to the power terminal. You will see that there is a hot wire that is then spliced through a switch and that then goes to the hot terminal of the light.