Add up the wattage of the bulbs in all the fixtures the switch controls to make sure it falls within the switch rating listed on the package or instructions. Wiring a 3 way light switch.

How To Wire A 4 Way Switch
Wiring for a three way light switch. Buy a single pole switch if one switch controls the lights or a three way if you have two switches controlling the same lights. No longer allowed after 2011 nec if no neutral wire in switch boxes 3 way switch wiring diagram light fixture between switchesline voltage enters the first 3 way switch outlet box light fixture is located between switch boxesno longer allowed after 2011 nec if no neutral wire in switch boxes. With a pair of 3 way switches either can make or break the connection that completes the circuit to the light. Wiring diagram 3 way switch with light at the end. The black and red wires between sw1 and sw2 are connected to the traveler terminals. This might seem intimidating but it does not have to be.
For example a long hallway or stairway might use a pair of three way. Interested in a 4 way switch wiring diagram. The three way switch is a variation of the standard single pole switch which controls a light only from one locationa third type is the four way switch which is used in conjunction with two three way switches to control lighting from more than two locationsthis configuration may be used in open plan homes or in large kitchens or great rooms where a central bank of lighting fixtures might. Wiring a 3 way light switch is certainly more complicated than that of the more common single pole switch but you can figure it out if you follow our 3 way switch wiring diagram. How to install a 3 way light switch overview while wiring a 3 way switch is more involved than something simple like installing an electrical box for an electric fireplace the task can be simple enough if you follow along with these instructions. A 3 way light switch allows you to control a light source from two separate points.
There are several ways to install a 3 way light switch. Take a closer look at a 3 way switch wiring diagram. In this diagram the electrical source is at the first switch and the light is located at the end of the circuit. 3 way switch wiring diagram line to light fixtureline voltage enters the light fixture outlet box. Wall switches used to control ceiling light fixtures or other fixtures come in three types. The methods shown here are some of the safest and most versatile though not the only options.
Three wire cable runs between the switches and 2 wire cable runs to the light. Most common is the single pole switch the type used to control a light fixture from a single locationthe next most common is the three way switch which is commonly used to control a light fixture from two different locations. With these diagrams below it will take the guess work out of wiring. Heres how to wire a three way switch with easy tips from the family handyman. Pick the diagram that is most like the scenario you are in and see if you can wire your switch. Although a 3 way is one of the hardest electrical circuits to figure out its also one of the most useful.