Three-Way Lighting Circuit Wiring | SparkyFacts The 3-way lighting circuit, which is often referred to as the two-way and intermediate lighting circuit, is a common arrangement usually found in large houses. If you are familiar with wiring a two way lighting circuit, then the addition of an extra switching point will not be much of a problem. Three-Way Switch Wiring Diagrams - Mr. Electrician 3-Way Switch wiring diagram depicting all wires in the ceiling junction Box. At each switch in the above 3-way switch wiring diagram the black wire gets connected to the common copper or black screw. In the ceiling light fixture electrical box, one black wire from a 3-way switch gets connected to the black LOAD wire on the light fixture. How To Wire a 3-Way Light Switch (DIY) | Family Handyman Wiring a 3-Way Light Switch. Wiring a 3-way light switch is certainly more complicated than that of the more common single-pole switch, but you can figure it out if you follow our 3-way switch wiring diagram. With a pair of 3-way switches, either can make or break the connection that completes the circuit to the light. 3 way lighting circuit | Light wiring Fig 1: Three way switching schematic wiring diagram. 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. All three switches are connected together by a three core and earth control cable. Notice that the wire connected to the COM terminals is looped straight through 3 Way Switch Wiring Diagrams [with PDF] - Electric Problems Wiring your 3-way switch should not be complicated if you have diagrams that you can use (you may want to print some out as well). It is also a good idea to watch some videos prior to installation to avoid unnecessary problems. Before we get to wiring diagrams, here is how the 3-way switch terminals are color-coded: Green for Ground Terminal. Wiring Diagram For a One Way Lighting Circuit Using the 3 Student training aid for the connections required to wire a lighting circuit using the 3 plate loop-in method. Video explains the connection required within 3 Way and 4 Way Wiring Diagrams with Multiple Lights - Do Wiring 3 Switches and 2 Lights. This drawing shows the wiring for multiple lights in a 4 way switch circuit with the source and fixtures coming before the switches. More lights can be added to this circuit by duplicating the wiring shown here for each additional fixture. Here 3-wire cable runs between L1 and L2, 2-wire cable runs from the last 3 way light switching (new cable colours) | Light wiring Fig 1: Three way switching schematic wiring diagram. 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. All three switches are connected together by a three core and earth control cable. Notice that the wire connected to the COM terminals is looped straight through 3 Way Switch Wiring Diagram - Easy Do It Yourself Home 3 Way Switch Wiring Diagram. Take a closer look at a 3 way switch wiring diagram. Pick the diagram that is most like the scenario you are in and see if you can wire your switch! This might seem intimidating, but it does not have to be. With these diagrams below it will take the guess work out of wiring. 3 way light switch circuit wiring diagrams | How to wire a 3 way light switch circuit wiring diagrams. Three way switch lighting circuit diagrams. Here is our selection of three way light switch circuit diagrams. This is where two switches control the same light (or lights). The electrical symbol indicates where power enters the circuit.