Connecting multiple lamps to a single switch: the guide

Connecting two, three, or five light points to a single switch can be intimidating: the fear of a short circuit, doubts about wire colors, or the worry that everything will go out at once. The answer lies in one principle—parallel wiring—which can be mastered in a few precise steps.

Once you have grasped this principle, the real fun begins: coordinating the light sources in a single room. Our designer lighting collection helps you compose a coherent ensemble on a single circuit.

How do I connect several lamps to one switch?

Connect all the lamps in parallel, a setup also known as a shunt or derivation. Each fixture receives the phase and neutral from the same switch in parallel, via a junction box. Each lamp then lights up at full intensity, and a burnt-out bulb will never turn off the other lights in the circuit.

Above all, turn off the power at the main circuit breaker and check for the absence of voltage with a tester. A single-pole switch controls the entire setup: it opens or closes the common phase, which is then distributed to each lamp. The neutral, meanwhile, connects directly to all the fixtures.

How do I connect several lamps to a single electrical supply?

From the single supply, distribute the phase and neutral to each lamp in a junction box using Wago connectors. The wiring diagram for multiple lamps remains a parallel setup: one phase wire and one neutral wire connect to all fixtures, using 1.5 mm² gauge wire.

As soon as you visualize three pendants aligned over an island, the principle is repeated identically for each point. Our designer pendants are well-suited to this type of grouped installation.

The procedure is the same as for a single point, as described in our guide on how to connect a ceiling light step by step, multiplied by the number of fixtures:

1. Turn off the circuit breaker and check for the absence of voltage with a tester.
2. Identify the wires: blue for neutral (N), red, brown, or black for phase (L), and green-yellow for ground.
3. Bring the power supply into the junction box.
4. Connect the phase of each lamp to the common phase using a Wago terminal, then do the same for the neutrals.
5. Connect the ground to every luminaire with a metal structure.
6. Restore power and test the lighting.

When a single conduit powers the whole room, the logic remains the same; it is detailed in our dedicated article on connecting several lamps to a single electrical supply.

Should lamps be wired in series or in parallel?

Choose parallel. Wiring lamps in series causes the voltage to drop: each bulb receives only a fraction of the 230 V, resulting in dim lighting, and a single burnt-out bulb will cut the entire line. Parallel wiring gives each fixture the full 230 V and isolates failures.

This observation also applies to low-energy lighting. Series wiring for lights should be avoided, including for LED strips and bulbs, which follow the same connection rule explained in our guide on safely connecting an LED.

You must also ensure that the lamps are compatible with each other. In a survey of 100 pendants from our catalog as of September 14, 2026, the bases were split between E27 (39%) and E14 (32%): standardizing the base before increasing the number of light sources prevents unpleasant surprises, and our guide helps you choose your bulbs and bases correctly.

Several light sources controlled by the same switch is precisely what a dining room chandelier over a large table requires.

How many lamps can be connected to a single switch?

The number depends on the total power, not the number of lamps. The NF C 15-100 standard limits a lighting circuit to 8 light points. With LEDs, where each fixture consumes very little, you rarely reach this ceiling before hitting the power limit of the circuit protected by its breaker.

Think in terms of total combined wattage, not the number of sockets. Add up the power of all fixtures and keep a margin below the circuit's capacity; our complete guide to choosing bulbs details this calculation.

This same survey shows that 99% of these 100 pendants have an IP20 rating, suitable for dry rooms only. Therefore, connect multiple fixtures in a living room or bedroom, never above a shower without an appropriate protection rating.

Do you have any doubts about the power of your circuit or the number of points to connect? Ask our team for advice before getting started.

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