2 Light Switch Wiring Diagram: A Guide To Installing Light Switches

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Staircase wiring two switches, two lights. Screwfix Community Forum

Installing a light switch requires careful planning and attention to detail. Knowing how to wire a two-light switch correctly is essential for proper lighting control. This article provides an easy-to-follow guide to wiring a two-light switch, complete with diagrams and safety tips.

Steps to Installing a 2 Light Switch

1. Gather Supplies

Before you start, make sure you have all the necessary supplies. You’ll need a two-light switch, a voltage tester, wire cutters, wire strippers, two-wire cable, a marker, and a screwdriver. Additionally, you should always make sure the power is off to the circuit before working with it.

2. Mark the Switch Locations

Once you’ve gathered all the supplies, it’s time to mark the switch locations. You’ll need to know where each switch will be located before you start wiring. Using a marker, draw a rectangle on the wall where the switches will go. This will help you determine the correct cable lengths.

3. Prepare the Wires

Now that the switch locations are marked, you’ll need to prepare the wires. Cut two lengths of two-wire cable for each switch. Make sure the lengths are the same for each switch. Then, strip the insulation from the ends of the cables and connect them to the switches.

4. Connect the Switches

Once the wires are connected to the switches, you’ll need to connect the switches to the circuit. Carefully follow the wiring diagram for the two-light switch. Once all the connections are secure, test the switches with a voltage tester to make sure they’re working properly.


Wiring a two-light switch can be a challenging task, but with the right supplies and a little patience, it’s not too difficult. Always make sure the power is turned off before beginning work and double-check all the connections with a voltage tester. Following the steps outlined in this guide and the wiring diagram should help you install your two-light switch quickly and safely.