How to Wire Multiple Light Fixtures to One Switch? | Hunker

Before you can wire multiple light fixtures to a switch, you have to know how to do just one. Every 120-volt circuit that powers lights in a typical home has two conducting wires and a ground. One of the conducting wires is black, and it's the hot one, meaning it carries the electricity on its outward path from the power source to the load.

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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.

How To Wire Lights in Series? In above fig, all the three light points are connected in series. Each lamp is connected to the next one i.e. the L (Line also known as live or phase) is connected to the first lamp and other lamps are connected through middle wire and the last one wire as N (Neutral) connected to the supply voltage then.

Basically the simplest way to have multiple lights on one switch is to run a power supply wire to the switch first. This would be a two wire cable (black, white, ground) take the black wire and connect it to one screw on the switch and connect the ground wire to a screw inside the electrical switch box mounted to the wall.

If you will be installing recessed lighting, the wiring will have to be done in series for multiple light fixtures. Installing multiple recessed lights in a series is not difficult at all, and can be completed in a relatively short period of time. Wiring a series of lights is similar to wiring only one light.

To wire this circuit in this manner, you will need to run a #14/3 between the two light boxes. This will allow you to connect the first light as you described above, and to run this additional light from the same switch by utilizing the red conductor in the 3-wire as the “switched” conductor, and the black wire as the continuous hot wire.

At the last light, just connect the incoming black wire to 1 terminal on the light, and then connect the white wire to the other one. This method is called wiring in parallel, so if one light blows, the current can still continue to the other lights to light them up. Some other things to be aware of:

Multiple Light Wiring Diagram. This diagram illustrates wiring for one switch to control 2 or more lights. The source is at SW1 and 2-wire cable runs from there to the fixtures. The hot and neutral terminals on each fixture are spliced with a pigtail to the circuit wires which then continue on to the next light.

Run a length of two-conductor wire from the existing fluorescent fixture to the new fixture. Loosen the screw on the side of the cable clamps on both fixtures. Feed the ends of the wire through the cable clamps and tighten the screws until the wire is secure.