Breathtaking 2 Way 3 Way Switch
Why are the two light switches that control one light fixture called a three way switch.
2 way 3 way switch. The following image shows a typical spdt toggle switch with its terminals. For wiring i have selected the standard way with a 3 7v lithium ion battery as the power supply. The spdt toggle switch can be considered as a two way light switch as it has three terminals and works very similar to the two way light switch.
Sometimes it s up switch off and sometimes up switch on. Two way switches are single pole single throw spst with two connection wires and are wired with 12 2 or 14 2 cable between the switch and fixture. Electricians call this a three way switch and it takes a smart electrician to wire this properly.
A three way wall switch is single pole double throw spdt with three connection wires and is typically wired with 12 3 or 14 3 cable between the two switches. This arrangement is often found in stairways with one switch upstairs and one switch downstairs or in long hallways with a switch at either end.