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A two way switch is UK terminology for a North American three way switch. Though the switch has two names it is still a Single Pole Double Throw switch that has three terminals. North American terminology. The circuit is the same as the three way switch system. To control from four locations just add another intermediate switch. For the system to work properly the new intermediate switch has to be adjacent to the existing intermediate switch. The connections must run - three way, intermediate, intermediate, three way.
That is called a 4 way light switch circuit. On each end of the circuit you install a 3way switch and in the middle you install a 4 way switch.Answer using British TerminologyIn the UK, 'three-way' switches are called 'two-way' switches (more logical, if you think about it!), and the 'four-way' switch is called an 'intermediate' switch.
To have each switch operate a single light, a 3-way switch must be installed for each light. Each switch needs to be wired to its respective light, with one wire running between the switch and light fixture. This way, each switch will control the light it's connected to independently of the others.
A three-way lamp switch is designed for controlling the brightness of a three-way light bulb, not for controlling an outlet. A wall-controlled outlet typically has a simple on/off switch mechanism, which is different from the dimming functionality of a three-way lamp switch. They are not compatible due to their different functionalities.
Another name for a three-way switch is a "double pole switch." This type of switch allows for controlling a single light or fixture from two different locations, making it useful for hallways or large rooms with multiple entrances. The term "three-way" refers to the fact that it has three terminals for connecting wires.