4 way switch wiring diagram
how to wire a four way light switch electrical circuit
A 4-way switch is a double pole double throw (DPDT) switch. It has 4 terminals or poles and consists of two 3-way switches that are modified. The switch can be used to control the electricity supplying lights from three locations. All four terminals are always brass in color. Traveler wires receive and transfer the electricity from each of the two 3-way switches.
A 4-way switch can be used in scenarios where you need to control the lighting of a particular place from 3 points. For example, you could have switches at each end of a hallway and a switch halfway down the hallway. You could also have switches at the top & bottom of a stairway and a switch by the front door.
One important factor to always remember is that you can’t have a 4-way switch without two 3-way switches.
Note: The diagrams below are shown using the Type NM Cable wiring option. These cables always have ground/earth conductor with them. The earth conductor is very necessary for insuring that the ground path is solid and will not fail. When making use of metal boxes, the earth conductor should always be attached to each metal box with the use of a threaded ground screw or the use of other means of attachment. The frames of all switches must also be attached to the earth conductor. Fixture boxes and switch boxes are not shown but they are necessary. 4 way switch wiring diagram how to wire for way
DANGER: The mains must always be turned off before any work is started. To avoid electrocution, the supply to the circuit must be dead. Turn the power off yourself and use a tester screwdriver to be extra sure. To be forewarned is to be forearmed. One can’t be too careful when it comes to working with electricity.
The two methods for wiring a 4-way switch are shown below:
- 4-way switch wiring diagram with the power feed through a switch:
A 2-wire cable is connected from the light fixture to the first 3-way switch. The hot source is connected to the common on the first switch and the hot terminal on the light is spliced through all the light fixtures to the common of the last switch.
Here the traveler run from the first switch to a set of terminals on the 4-way switch and from the second switch to the travelers on the last 3-way switch. The source of the hot to the light is the common terminal which is spliced through each switch box.
4 way switch wiring diagram with multiple lights power source feed vea the switch :
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