Wiring method for cabinet light switch

Under-cabinet lights can be wired to a wall switch using either a line-voltage or low-voltage system, with careful routing, proper connections, and adherence to safety protocols.Choosing the SystemLine-Voltage (120V): Connects directly to household wiring without a transformer. Requires wires rated for 120V and careful concealment. Suitable for rigid light bars or puck lights that operate at standard voltage .Low-Voltage (12V or 24V): Uses a power supply unit (PSU) to step down 120V AC to safe DC voltage. Easier to conceal thin wires and safer to handle. Common for LED strips and puck lights .Materials NeededUnder-cabinet lights (LED strips, puck lights, or bar lights)Power supply (for low-voltage systems)Single-pole wall switch rated for the circuitElectrical box for the switchWire (14 or 12 AWG for line-voltage; thinner gauge for low-voltage)Wire connectors (wire nuts or crimp connectors)Optional: dimmer switch, conduit, adhesive wire channelsWiring StepsTurn Off Power: Switch off the circuit at the breaker and verify with a voltage tester .Plan Layout: Determine light placement and switch location. Plan wire routing through cabinet frames or along undersides using channels or raceways .Install Lights: Secure fixtures under cabinets using screws or adhesive strips .Run Wiring:For line-voltage, run hot (black) and neutral (white) wires from the power source to the switch and then to the lights.For low-voltage, run 120V AC to the PSU, then low-voltage wires from the PSU to each fixture .Connect Switch:Connect the incoming hot wire to one terminal of the switch.Connect the outgoing wire to the light or PSU.Connect neutral wires together in the junction box.Connect ground wires to the switch and box grounding screw .Secure and Conceal Wires: Use wire channels, raceways, or drill small holes through cabinet frames to hide wiring .Test System: Restore power and verify the switch controls all lights correctly .Safety TipsAlways confirm power is off before handling wires.Use wire connectors and secure all connections tightly.Ensure the PSU has proper ventilation if using low-voltage systems.Follow local electrical codes for wire gauge, switch rating, and grounding . By following these steps, you can achieve a clean, safe, and functional under-cabinet lighting system controlled by a wall switch, enhancing both kitchen aesthetics and task lighting efficiency.