Identify which of the 3 switches is at the line end. You can put the dimmer at either location but not both locations.
Does It Matter Which 3 Way Switch I Put A Dimmer At On A 4
Can you put a dimmer on a 4 way switch. In fact a dimmer can be used this way in place of any of the 3 way switches on this page. If you want to install a dimmer id buy a lutron 3 way dimmer at a compatible wattage for the load. Otherwise its either got to be the first or last switch. When there are multiple dimmer switches you will need to install dimmer switches that have a master switch and one or more slave switches. In order for the dimmer switches to communicate properly all switches need to be replaced with idevices dimmer switches. This switch has a quality build and installs like a standard light switch.
You will need a three way dimmer and a three way switch. If you can find a 4 way dimmer switch you could replace any 4 way switch in a multi way circuit with it. For 3 and 4 way setups the idevices dimmer switches communicate via bluetooth technology. With a standard single pole dimmer a single switch controls the light. Determine the number of switches that control the light fixture. Types of 3way and 4way dimmer switches brands such as lutron which have the maestro series of switches are perfect for this type of multiple switch application.
Three wire cable runs between all the switches and 2 wire cable runs to the light. With a three way dimmer you can control a light with two switches. You can only have one dimmer per group. If you are switching from two locations you also need to use 3 way switches for both the plain switches and dimmers many dimmers are 3 way compatible. To make this circuit work a 3 way dimmer can be used in place of one or both of the standard 3 way switches. This is the wiring for a dimmer in a 4 way circuit.
Keep in mind that there is an extra wire on this switch so you can use it in a 3 way switching setup using more than 1 switch 2 or more fixtures or as a single light fixture control 2 wire. I wont say all ways in which 3 ways are wired would work with the dimmer beginning or end but the standard way the dimmer can replace either 3 way switch. This lets you dim from one location and turn the lights on and off from another. Yes you can use just one dimmer regardless of how many 4 ways are inbetween your 2 3 ways.