However, since it also uses a common terminal it may also be referred to as the common system method. The use of the traveler terminals gives this method its name traveler system. This method of wiring a three-way switch has two traveler terminals and one common terminal. Tip: Always mind safety – always turn off the power to any circuit you are working on before you start wiring, repairing, or replacing its fittings. However, the carter system still exists in some of the very old buildings that were wired a long time ago when it was still in use. The alternate system is rare while the carter system is prohibited in use in the USA.

Of the three methods, the traveler system is the most common and most flexible method. There are three main methods of wiring a three-way switch namely the traveler system, the alternate system, and the carter system. You can determine this by assessing your choices and the arrangement of your wires and fixtures on the site before purchasing them. The specific materials and quantities that you will need may vary depending on your choices and the requirements of your project.

Wire nuts (twist-on wire nuts) or lever nuts (lever wire nuts).

The material you will require may include the following: The tools you will require include the following (Read more about tools for electrical projects): The specific tools that you will need may slightly vary depending on the exact tasks entailed in your project. socket outlets, fans, pumps, heaters, or other appliances) in a similar way. Tip: It is important to note that, although three-way switches are commonly used to control lights, they can also be used to control other loads (e.g. Alternatively, they may also be wired such that the switch toggles are in opposite orientations for on, and the same orientation for off.

The two switches may be wired in such a way that the switch toggles are in the same orientation for on, and opposite orientation for off. One at a bedroom door and the other close to the bed (bed switch).At either door of two doors leading into and out of the same room.At either end of a long corridor or a staircase.A three-way switch system can be used to control a single light or a set of multiple lights (2, 3, 4, or more lights).Ĭommon places where the two switches of a 3-way switch system may be installed to facilitate convenience in operating lights include:

Each of the switches is positioned at either of the two locations from where the light fixture is to be controlled.Ī three-way switch wiring system will enable you to conveniently turn on or off a light or set of lights from two different locations.īy correctly connecting two three-way switches together, toggling either switch turns a light on if it was initially off, or turns it off if it was initially on. Repair & Replacement of a 3-way Switch WiringĪ three-way switch system allows for controlling (putting on and off) a light fixture from two different locations.(a) Light Fixture First (at the Beginning).3-Way Switch Wiring with Power at Light (Diagrams).3-Way Switch Wiring with Power at Switch (Diagrams).

3 way switch wiring power at switch