4 Way Switch Wiring Diagram Power Switch At First

The black line wire connects to the common terminal of the first 3 way switch. This diagram illustrates wiring for a 4 way circuit with the electrical source at the light fixture and the switches coming after. Alternate 4 way switch wiring is fairly complex power enters the first light fixture box instead of the first 3 way switch box this wiring configuration is no longer allowed as of the 2011 nec if a neutral wire is not present in the switch boxes.

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Typical 4 way switch wiring nm cable.

4 way switch wiring diagram power switch at first. Two wire cable is run from the light to sw1 and 3 wire cable runs between the three switches. First of all we need to go over a little basic terminology on switches. Four way and intermediate switch wiring diagrams. A 2 wire cable is connected from the light fixture to the first 3 way switch.

4 way light switch with power feed via the light this circuit diagram shows wiring for a 4 way circuit with the power source at the light fixture and the switches following. 4 way switch wiring with light first. How to wire a 4 way switch. Next connect the white wire coming into the box to the white wire on the fixture.

4 way switch schematics can also be used for intermediate switches. A typical four way switch wiring diagram. This allows you to control a load from other locations in addition to the 2 locations that a 3 way circuit provides. In this method the power source is at the light fixture and the two 3 way switches follow after the light fixture.

The hot source is. A 3 wire nm connects the traveler terminals of the first 3 way switch and the first 4 way switch. Then connect the black wire coming from the fixture to the black wire going to the first 3 way switch. A two wire cable c2 is run from the light to the first switch sw1 and a 3 wire cable runs between all the switches.

In the 1st diagram below a 2 wire nm cable supplies power from the panel to the first switch box. Wiring a 4 way switch is simply adding a switch to an already existing 3 way switch circuit. The 4 ways are in between. The load wire is in one 3 way switch box and the line from the power source is in the other 3 way switch box.

4 way switch wiring diagram with the power feed through the light. To wire a 4 way switch start by turning off the circuit breaker for the room you re working in.