I have two wall switches in a hall for an over head light. I would like to install a rotary dimmer in one of the switches. My dimmer has 1 green and two black wires, and my wall switch has 2 black, 2 red and 1 green wire. How do I make the connection? Thanks

that is a 3 way switch. In order for that to work it has to be installed to a light with more than one switch. For example in a hall way and there is a switch at both ends of the hall then both switches need to be 3 way switches

with a three way switch like this, you will have two traveller wires and a common wire. Look in the instructions for the switch or on the back of the device itself to see if there is a wire labeled "common" or "com". This common wire from the old switch hooks up to the common wire on the new switch. I did a bit of searching on the leviton 6602, but couldn't find anything specifically about the three way version (I would venture to guess, however, that the red wire on the old switch is the common). The common on one of the three way switches will always be a constant hot (or power) wire...the common on the other three way switch will be the "switch leg" or the wire that connects directly to the light. The two travellers go to the other two wires. Check the pamplet that came with the lutron device, it should show which wire is common and which are travellers.

At this point either. Once you hook up the switch test the switches on both sides. Make sure each one turns on and off if that makes sense. If the blue wires are on wrong one switch will only work if the other one is on. If that happens reverse the blue wires and that should fix it.

make sure your application is correct first,this switch is controlled from at least 2 locations,you cant put 2 dimmers on the same light,if you have taken the wires directly off the switch you will wire the white to the black of the dimmer and the 2 reds to each of the other wires,the white in this case is you pivot or constant hot,the other wires are the travelers

You posted under Leviton rotary dimmer.
Lutron and Leviton have many 3-way dimmer styles, and both make 3-way rotary dimmers.

I remember years ago replacing 3-way switches with dimmers and having same experience as you. One dimmer has to be ON for the other dimmer to dim.

Later I learned when you replace both 3-way switches with dimmers, you buy a control-and-companion dimmer set. One dimmer is main, and it lets you dim from both locations. The two dimmers communicate with each other electronically. Buy these dimmers at lighting store that specializes in fixtures and dimmers. Ask for most experienced salesperson.

I checked to see if rotary dimmers are made in the companion set. And neither Leviton or Lutron show 3-way companion set rotary dimmers.

1) Leviton spec sheet on rotary 3-way dimmers does not show companion dimmer. This indicates that Leviton rotary dimmers don't have capability of communicating with each other.

2) Lutron has image of 3-way rotary dimmers.
Image shows single rotary dimmer in 3-way & 4-way circuit.
This tells me that Lutron does not have companion dimmer for 3-way rotary dimmer.

The white and the black wires are both hot wires, and the green wire is for earth ground only. The green wire does not belong hooked up to the white wire.

The two black field wires should be attached to one side of the dimmer switch (one of the black wires from the dimmer switch)

The white field wire should be attached to the other side of the dimmer switch (the other black wire from the dimmer switch)

The green wire from the dimmer switch should be hooked up to earth ground only (any un-insulated copper wire that is inside the switch/outlet housing) and if you can not find it attach the green wire to the inside of the light switch outlet housing and be sure that it is attached to metal.

The other hall light switch that you are talking about must be connected inline with that light switch you trying to turn into a dimmer, and it should operate again nomally once you have connected that light switch properly, and if not check for any tripped circuit breakers.

i want two dimmer switch parrel they both fhave two black and one green how fo you wire it up

Called the guys at Home Depot and they helped me over the phone.
thanks

one black from the dimmer to black. the other black from the dimmer connected to red. the green connected to the bare wire.

House wires are for a 3 way switch, you will need a different switch