3 Wire Switch To 2 Wire Switch. Take a look at these two diagrams below. Three-way switches allow for controlling a light fixture from two separate locations, these are usually used at the top and bottom of a flight of stairs or at two different entrances to a room.
You can connect any number of switches, but you There are only two travellers between the switches. Notes on wiring Reduce unwanted electrical noise by using shielded coaxial cable for your longer wiring runs (for example, the connection between the controls and the output jack). It is a little more involved than simply wiring a switch at the end or in the middle of a circuit, mainly because there are more wires and connections involved.
Two way switch can be operated from any of the switch independently, means whatever be the position of other switch(ON/OFF), you can control the light with other switch.
Neutral wires are never connected to switch Only the hot wire is turned on-off.
The black and red wires are "travelers" and are connected to the traveler screw. A wide variety of three wire switch options are available to you, such as lacp. Notes on wiring Reduce unwanted electrical noise by using shielded coaxial cable for your longer wiring runs (for example, the connection between the controls and the output jack).