A three-way switch works because it can be on in either the up or down position, depending on the position of the other switch. A three-way switch requires an extra wire between the two switches as compared to a two-way switch. In otheranbsp;...
|Title||:||Science in Elementary Education|
|Author||:||Joseph M. Peters, David L. Stout|
|Publisher||:||Prentice Hall - 2006|