Here we have a 3 way switching lighting circuit sometimes called two way switching with intermediate. This might seem intimidating but it does not have to be.
Lighting Circuit Wiring Diagram 2 Way Best Wiring Diagram
3 way intermediate switch wiring diagram. Finally connect the third switch which is a two way switch to the second length of the 3 coreearth cable. Take a closer look at a 3 way switch wiring diagram. How to connect 3 and 4 way switches easy wiring duration. Usually the third wire passes the middle intermediate switch but is joined in a separate terminal block. Three way switching 2 wires. An intermediate switch can however be implemented by adding appropriate external wiring to an ordinary six terminal dpdt switch or by using a separate dpdt relay.
Three way switching 3 wires. I did not include grounding conductors on the 4 way switch wiring diagrams in order to keep them simple. Traveler wires are interchangeable. This allows a single light to be turned on or off from any of the switches. Connect the black wire to the l1 terminal the grey wire to the l2 terminal and the brown wire. The white wire between switches is not being used as a neutral.
An example of three way switch wiring with the line and load in the same 4 square electrical box. In the above diagram the white wire must be re identified as a hot wire at each switch location. Most likely to be found with wires in conduit. I have a diagram for this light switch wiring method on my 3 way switch page. This page shows it wired in the old cable colours if your house has the new colours you want to go here. 3 way switch wiring diagram with line and load in the same switch box.
Pick the diagram that is most like the scenario you are in and see if you can wire your switch. Intermediate switch3 way switch connection wiring diagram duration. A 3 wire nm connects the traveler terminals of the first and second 3 way switch together. Two cubic inches are required by the national electrical code for each 14 wire. See tables 31416a b. With these diagrams below it will take the guess work out of wiring.
Do not forget to connect the earth conductors to the earth terminal provided. Three wires between the two end switches probably using 3 core and earth cable. Two wires between each switch. The middle switch is. The black line wire connects to the common terminal of the first 3 way switch. Typical 3 way switch wiring nm cable.
The intermediate switch wiring should look like this. 3 way switch wiring diagram. In the 1st diagram below a 2 wire nm cable supplies power from the panel to the first switch box. Ryb electrical 31940 views. By connecting one or more 4 way intermediate switches in line with 3 way switches at either end the load can be controlled from three or more locations.
Gallery of 3 Way Intermediate Switch Wiring Diagram
