How do two switches control one light?

Answer

When there are two switches that control one light, this is actually referred to as a three way switch, since there are three terminals at work, which are used to control a circuit from two separate locations. Installing a three-way switch is considered to be highly difficult for someone who is not an expert. There are a number of items required for such a project, some of which include terminal screws, grounding screws, wire strippers, and black tape.
Q&A Related to "How do two switches control one light?"
1. Go to the service panel and turn off power to the circuit you will be working on. If there is already a switch with one light installed, return to the switch and remove the cover
http://www.ehow.com/how_4795293_wire-two-lights-on...
Because when two lights use the same battery, both lights need the same power to work, so the power has to split in half making the bulb's brightness dimmer. Ridiculous. If the lamps
http://wiki.answers.com/Q/Why_do_two_lights_connec...
ok heres how ya do it. make sure power to existing light is off either by breaker or switch if youre brave lol.take down the existing light and unwire it .now all you should have
http://answers.yahoo.com/question/index?qid=201006...
The device you are looking for is called a KVM Switch.
http://www.quora.com/How-can-I-have-two-computers-...
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