FourSometimes the switch wiring connection diagram is printed on the inside of the 4-way switch packaging box (See example below). Bare or green ground wires are spliced together with a pigtail or two and then connected to the metal switch box with a 10/32 machine screw, and to the green screw on the switch.
Digital Timer Switch Electrical Wiring InstructionsHow to Wire a Timer Switch for Lighting. Ron, the digital time switch that you have requires a separate neutral wire. Your wiring configuration will not work with this timer unless there is a neutral wire in the switch box. As described above, the wiring will require four wires for the connections to the time switch.
How to Wire a Time Switch Connect the Neutral Wires . The next step in wiring the time switch is to connect the neutral wires. Cut an 8-inch length of white insulated wire as a pigtail, then strip 1/2-inch of insulation from each end. Insert one bare end of the pigtail into the neutral screw terminal on the switch and tighten the screw.
Timers and Light Switch Wiring Note that the timer switch has a white wire, black wire, red wire and a green wire, and that this switch box is in the middle of the run for both lights, I believe there are four wires coming into the switch box, white wire, black wire , green wire, and a black wire that is ‘taped’ white.
electrical This type of timer requires a seperate neutral (whereas most switches just interrupt the hot) so that the timer can be powered when the switch is in the off position. In your configuration, the line (power) comes in at the fixture and there is likely a 14/2 cable running to the switch for the sole purpose of interrupting the hot.