You just have to check the product descriptions to see which is which. From there 3 wire cable runs to the dimmer in the second box and 2 wire cable runs from the dimmer to the light at the end of the circuit.

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Multiple dimmer switches in one box. I have a four gang box that im installing new dimmers in. Stack exchange network consists of 177 qa communities including stack overflow the largest most trusted online community for developers to learn share their knowledge and build their careers. Sparky channel 30549 views. Currently all of the neutral white wires coming into the box are connected together and not to the dimmers. Test the wires with a voltage tester to ensure power is off. Wire or rewire multiple outlets in one box.
Pull off the faceplate pull out the dimmer units and the dimmers both have two black wires coming out no identifying marks. Lutron electronics makes dual dimmer switches that fit inside a single box. Another nm cable connects the first outlet box to the next box es and so on until you reach the end of the chain. You connect multiple dimmers the same way you connect multiple switches. Enjoy the convenience of operating two dimmers from the same box. Remove wall plates and mounting screws for both switches you are replacing.
Incoming power is connected to one terminal of each dimmer. Turn off the power for the switch location at the circuit breaker box. In this circuit the source hot is connected to the common terminal on the 3 way switch in the first box. Separate switches for bath fan and light from single switch in a 1960s house duration. Multiple light switch wiring with conventional light switch wiring using nm cable a nm cable supplies line voltage from the electrical panel to a light switch outlet box. The new dimmers require.
You will want the largest box possible and you will need to derate the dimmers to take into account multiple in one box. One died so i decided to update with some nice led rated lutron dimmers toggle slider. Two dimmer dialsswitches push in for on or off twist for dimmer function in one receptacle near the doorway. Make sure you do not exceed the derated power on each one. Gently pull switches out from their boxes so wiring can be viewed. The source neutral is spliced through to the light fixture using the white cable wires at each box.
A dimmer switch for a fan must conform to power load rating specified by the manufacturer. They come with load capacities for lights or fan and light combinations. Most companies that make in wall micros including aeon labs and fibaro make both types. Tour start here for a quick overview of. A dimmer is a multi level switch both are available as in wall micros but they will be different models.