“Way” and “Gang” switches differ in function, whereas a “way” is the number of places to control light(s)/device(s) from (multiple control points), whereas a “Gang” indicates there are multiple switches mounted on one plate in addition to defining an arrangement for different devices placed together into groups. A “Way” Switch (is used frequently in stair wells and hallways) allows control of multiple devices (light sources), and most importantly functions at greater distances than other types of switches. “Gang” switches indicate how many switches are arranged together (i.e. 2-Gang Switch controls two separate lights). Both “Way” & “Gang” terminology is essential for creating a configuration/layout for lighting systems in residential & commercial structures.
The word “gang” relates to the number of switches installed on a switch plate. For example, a 1-gang switch consists of one switch, while a 2-gang switch consists of two different switches mounted on the same plate. Each switch in the gang arrangement can operate a separate device. A “way,” on the other hand, relates to the number of points from where the circuit or light can be controlled. A 1-way switch will operate from one point and a 2-way switch will allow control of the same light from two different points usually located at two ends of the hallway or stairs.
The way in which gang and way switches work greatly relies on their constructed design.
In the case of light switches, “way” means the number of switches that control a single light source or circuit. Hence, the term “2-way switch” means that the light can be controlled from two locations.
A 3 gang 2-way switch means that there are three switches on the switch plate that can control a light source from two locations. Essentially, it combines a number of control points with multiple circuits.
A normal switch can only operate a light from one selected location while a 2-way switch can operate the light from two different positions, hence used for efficiency in larger sized rooms.
While a 2-way switch can operate a light from two locations, a 3-way switch can operate it from three locations.
