First you need to decide what you are trying to accomplish. You can wire the Timer switch in series with or parallel to the 3-way switches. If in series then the 3-way switch function would depend on the timer state. If the Timer switch was ON then the 3-way switch could turn the connected device ON or OFF from either location. If the Timer switch were OFF the device would be OFF no matter what you did with 3-way switches. To wire in this fashion put the timer between the supply and the input to the switches.
If the Timer is in parallel then if the Timer is ON it doesn't matter what you do with the 3-way switch, the device will be ON as long as the Timer is ON. If the Timer is OFF then the 3-way switches will work in their normal fashion. To wire in parallel connect the supply to one side of the Timer and the device to the other.
If I am correct I think you are wanting to know how to connect a 3 way switch where you can turn off an light at 2 locations. At one switch you run a 12/2 wire from the switch to the light. There is no power at this switch. At the other switch you have your a power input wire. Run a 12/3 wire from one switch to the other. Connect all the whites together and shove them back in the box at the switch with the wire going to the light. At the switch with the 12/2 wire going to the light, connect the black 12/2 wire coming from the light to the black screw on the 3way switch. Now connect the red wire and black wire from the wire you ran between the switches to the other 2 screws on the switch. It does not matter which you connect to which screws. Connect the ground wire and put that switch in the wall with the cover on it. Now move the the other 3way switch with the power wire. Again connect all the whites together and shove them back in the box. Connect the black wire from the power source to the black screw on the switch. Now connect the other 2 wires left, black & red to the other 2 screws that are left. Again it matters not which wire you connect to which 2 screws that are left. Connect your ground wire and put the switch in the wall a cover on. At the light connect the black to black and white to white. Connect the ground wire to the green or ground wire on the light. You are done.
Yes, if you wire it correctly. The down side is it won't have an on-off label on the switch. Connect supply voltage (Black wire) to the common terminal on 3-way switch and the load to either of the two other connections. By convention the light should be on when switch handle is up and off when switch handle is down.
when wiring a 3 way light switch u have to have a hot side and a switch side meaning switch one out of the two will be fed with your power 120v or 277v/ the hot wire will connect to the black screw on switch one then run 3 wires to the other switch two of those three wires will connect to the other two screws on switch one and will connect to the same two screws on switch two the third wire is ur neutral wire the white wire u have to carry over to switch two just use wire nuts for the white wire ok now the black screw on switch two will connect to the black wire feeding the light and the white wire u carried over will go to the white wire going to the light also. so you will need to run 2 wires down to switch 1 a hot and neutral/then 3 wires from switch 1 to switch 2/and then 2 wires out of switch 2 going to the light,out of the 3 wires u run from switch 1 to switch 2 the white is the only 1 that goes out to ur light together with the black wire that is connected to the black screw on switch 2 hope u can understand this try draw it out as u read it
If you are intending to use a 4 way switch as a single pole switch this is quite easy. A 4 way switch has 2 pairs of terminals (4 screws); usually 2 are brass and 2 are black. Place the hot wire on one of the brass screws and the switch leg wire on a black screw and you're done. You may need to test the switch to know what position to place it in for down to be off since this is not self evident on a 4 way switch.
Most likely the 6 lights are fed from one another. At each light there will be a black, white and ground coming into the fixture and another set leaving. The light is connected to these wires by wire-nuts. Remove the light in question from the black supply wire. From your new switch run a typical Romex wire to the light. Put black electric tape on the white wire at each end to indicate it is a hot wire. Connect the Romex black and white wire with tape to each terminal on switch. At the light end connect one wire to light wire you removed previously and the other to the wire-nut where the light was previously connected.
The presence of the red wire in a light switch situation usually involves a 3 way switch. The light itself would only have the black and white running to it but the switches have the extra wire between them for the traveler.See the Related Link shown below for a diagram, or just google "3 way switch diagram".
If there are three current carrying conductors terminated on the switch you want to replace, then you can not use the new switch at this location. What it sounds like is the existing switch is part of a three way light switching circuit. Check online for images of "wiring of three way switching systems" and you will see what I mean.A regular light switch will only have two termination points on the switch. This type of switch could be a direct substitute for the interval timer switch, as both have only two terminal points.The only way that you could use the new switch in this circuit is to cut in a new junction box for the new switch adjacent to one of the existing light switch boxes. One end of the circuit would use the new switch for opening the incoming "hot" conductor or at the other end of the circuit, the new switch would open the conductor that goes to the light (load). If this method is used the existing switches will not be used for controlling the light and must be in a position so that the light will be always in the on position.If the three way switching is not needed then the existing switches can be removed and the wiring in the boxes can be rewired to accommodate the new switch and the other box would be blanked off.
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