How do you turn on/off a light bulb by using any 3 switches in a house?

Answer 1

Here's a link that shows you every possible combination a DIY electrician can ask for. Click on the one you want and it'll show a wiring diagram for it.
Good luck.
http://www.electrical-online.com/wiringdiagrams.htm

Answer 2

You need to get 2ea 3-way switches and 1ea 4-way switch.
From the hot wire run to a 3- switch on the common side and run two wires from the switched sides to the 4-way switch. Then from the other 2 points on the switch run the wires to the switched side of the last 3-way switch. From the common side of the 3-way run the lead to the hot side of your light. You will also need a white or common wire to the light.
If you want to add any more switches to the light, get more 4-ways and connect them in series with those two wires that are called runners.

To make things easy try using #14/3 W/grd Romex. You will have a black wire and a red wire for the runners and a white wire for the common or neutral and a bare wire for the ground. Good luck

Answer 3

Your question is kinda vague/confusing, but I think I know what you're asking. If so you need two 3way switches and one 4way switch wired in series using travelers. The 4way will be wired between the two 3ways. It won't be hard to find a wiring diagram for this online. I hope this helps.