Have a MIRELV-600M with 2 MA-R in a 4 way situation. Lutron tech support has given us a different wiring solution each time we call but it still does not work. They say that these product are compatible to...
The best I can do is tell you how a 3 way and a 4 way switching circuit works, once you understand that all you have to do is throw in the dimmer (note: you can only have one dimmer in a circuit, the rest of the switches must be simple on and off switches). I did some research on the dimmers you purchased to use, and it claims that the accessory dimmers can be used along with the MIRELV's as you have said but in my experience when you try to do something like that, one dimmer would have to know what the other two are doing, and that is not happening, and unless the current is electronically controlled on the whole circuit by each dimmer, you'll never get all three dimmers to work.. So lets see if we can get it wired properly and get it to work, if not you will have to try using one dimmer and two regular switches and see if it resolves your problem. In every four way circuit there is at least 2 three way switching devices, one at the beginning of the circuit where the power comes in and one at the end of the circuit where the power goes out to the lights. You can have numerous 4 way devices in the middle of the two three way devices. So let start at the first 3 way device, which will have three terminals one it. Every three way switching device has whats called a common terminal, this is where your incoming power attaches. Then you have 2 "traveling" terminals where your traveling wires will connect (called this because your power will travel to or communicate with your four way switch through these wires (note: you cannot mix these wires up or your circuit will not work). Order doesn't matter at the three way, but at the four way you need to keep them straight; there are four terminals on your four way switch designed to pass the current along that you fed it from the three way. The are two types of four way terminals, some times incoming wires go on top or bottom terminals, sometimes on left or right side. Either way if incoming wires are on top and you have red wire on one side and black on the other when power leaves at the bottom you keep the colors on the same side (Note: all these concept apply if your dimmers have pigtail wires to attach the wires to as well). And once you get to you final three way switch you want to keep the traveling wire colors the same as the terminals on the first three way switch. The power will leave this last switch and go out to your lights through the common terminal. If your dimmers happen no to work, remove two devices and replace with two normal switches, just make sure they are three way or four way switches as needed (remember four ways go in the middle of two three ways). Three way switching and four way switching is very confusing, and I know the Lutron company won't try to explain how things work, just take your time with it.
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