Ground connection diagram is shown separately. Electrical outlet boxes can have numerous NM cables going in and out. The common terminal of the second 3- way switch supplies line voltage switched from the second 3- way switch through the switch boxes and back to the light fixtures using the NM white wire with black tape on each end.ĭiagrams shown on this page are simplified for clarity. I can easily wire the fan to a simple switch and then control lights and motor with the ceiling fan chains. I have room and access in the box with the 14/2 source. The traveler wires are interchangeable on each switch. I currently have a standard three way switch: 14/2 source -> three way switch -> 14/3 wire -> three way switch -> lights. A 3- wire NM connects the traveler terminals of the last 4- way switch and the second 3- way switch. The circuit consists of a two way switch at each end (top and bottom switches in Fig 2) and an intermediate switch in the middle. Two wires are incoming voltage, and the other 2 wires are out going voltage to the 2nd switch. A 3- wire NM connects the traveler terminals of the first 4- way switch and the second 4- way switch, and so on. A 3-way switch has 4 wires because there is a 2nd switch controlling the voltage. Left connections toggle between the two right connections. These wires should have black tape on both ends to indicate line instead of neutral.Ī 3- wire NM connects the traveler terminals of the first 3- way switch and the first 4- way switch. Choose a switch and follow the flow of the switch that changes state. Compatible with traditional on/off switch not compatible with traditional 3-way dimmer or 4-way switch/dimmer not compatible with 3-way smart switch/dimmer from other brands Network Connectivity 2.4 GHz only, 802. The white wire (line switched) connects the white wires of sequential NM traveler cables together and eventually connects to the common terminal of the second 3- way switch. The black wire connects to the common terminal of the first 3- way switch. This neutral wire terminates at the last light fixture box and does not travel through any switch boxes.Ī 2- wire NM connects the last light fixture box to the first 3- way switch box. Each switch has 4 wires coming out of the back. I am not sure what my electrician did when wiring my new office. The neutral (white) wire connects to the light fixture(s) and the white wire(s) of the NM cable(s) that connect between the light fixture boxes. 4 wire switch with 3 wires in wall Ask Question Asked 3 years ago Modified 3 years ago Viewed 5k times 2 Please help. Fold the wires neatly back into the wall box and push the switch into the box. The line (black) wire eventually connects to the common terminal of the first 3- way switch. Identify the circuit breaker that controls electricity in the area where you will be working. In the diagram below, a 2- wire NM cable supplies line voltage and neutral from the panel to the first light fixture box on the left. 1 Turn on the light or device being controlled by the 3-way switches, if you already have them installed. This wiring configuration is no longer allowed as of the 2011 NEC if a neutral wire is not present in the switch boxes. Power enters the first light fixture box instead of the first 3- way switch box. A 4- way switch wiring option is fairly complex.
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