Wiring leviton 6161T switch

SOURCE: I have a leviton 057 with 2 black wires and 1

house has a black and a white line and a ground commper, dimmer has two black and a green
How do I know which blck lead goes to white and which goes to black? One lead is shorter than the other.

SOURCE: Trimatron 3 way push on off dimmer switch

One wire is the common and the other two are the travelers.The trick is to find which one is which.... If you can see into the electrical box check to see if one of the red wires and the black wire are from the same cable, if they are then more than likely those two wires are the travelers; you can also look at the other switch and see which two wires are on the brass colored screws, those would also be travelers. The common is usually the wire that is on the black colored screw. Once you figure out which wire is your common, I'm thinking that it is one of your red wires, you would attach that wire to the black wire on the dimmer and the other two wires to the 2 red wires on your dimmer.

SOURCE: Have a Leviton dimmer with red, black and green

You are correct in assuming green is the ground and connects to bare copper wire. Black is always the HOT wire and should be attached to the black wire. Red wire connects to white wire.

SOURCE: i have a black and white wire to hook to. leviton

The blue wire is the switched hot wire coming from the leviton.
So:
black hot/source to black leviton -- blue leviton to black for light fixture or black "line" on GFI -- all whites connected together.

Charlie

P.S. If the GFI is only powering a light fixture, it is not needed.

SOURCE: I have a Leviton Decora five button electronic timer.

You need to have a pair of white wires wirenuted and shoved in the back of the box. White to white, black to the hot and blue to the load on the second black. Some of these have a yellow wire for three way connections.