How to install cabinet under-cabinet LED puck lighting with a plug-in driver
Installing under-cabinet LED puck lights with a plug-in driver is a quick way to add focused task lighting to your kitchen or workspace. This guide walks you through a straightforward, non-permanent installation you can finish in about 1–2 hours, using common tools and minimal wiring. Follow each step for a neat, safe result and a professional look.
Step 1: Plan layout and measure
Decide puck placement before drilling: space pucks 8–12 inches apart for bright, even light or up to 18 inches for accent lighting. Measure and mark locations on a horizontal line under the cabinet, keeping at least 2 inches from front and back edges to avoid glare. Sketch the run and measure cable length to the outlet so you won’t be short.
[Illustration: hand drawing cabinet underside with measured marks and a tape measure]
Step 2: Gather tools and materials
Collect 3–6 LED puck lights, a matching plug-in driver, 18–22 gauge jumper wires or supplied leads, double-sided tape or screw mounts, a drill with 1/8 and 3/16 inch bits, wire strippers, a screwdriver, masking tape, and a pencil. Having a small level and ruler speeds alignment and ensures a straight row.
[Illustration: collection of pucks, driver, drill, tape, wire strippers on a workbench]
Step 3: Test lights and orientation
Before mounting, connect pucks to the driver and plug into the outlet to confirm all lights work and polarity is correct; test takes 5–10 minutes. Check each puck’s beam direction and color temperature so you can orient them consistently under the cabinet for uniform appearance.
[Illustration: person holding a lit puck under a cabinet checking beam and color]
Step 4: Mark and prepare mounting points
Use your layout marks and a small level to mark final screw or adhesive positions on the cabinet underside. For screw mounting, pre-drill 1/8 inch pilot holes at each mark; for adhesive, clean surfaces with rubbing alcohol and allow to dry for 5 minutes to maximize bond.
[Illustration: cabinet underside with pencil marks and a small drill creating pilot holes]
Step 5: Route cables and secure pucks
Run the low-voltage wires along the underside of the cabinet, tucking them into a shallow groove or securing every 6–8 inches with cable clips or small staples. Mount each puck using the manufacturer screws or heavy-duty double-sided tape, pressing firmly for 30 seconds and letting adhesive cure for 1 hour before moving wires.
[Illustration: hands routing thin wires under cabinet and securing a puck in place]
Step 6: Make connections to driver
Bring the cable run to the plug-in driver location and connect pucks using inline connectors or solder and heat-shrink: use 18–22 AWG, ensure correct polarity, and tighten connections securely. Tuck excess cable into the driver housing or a small cable box, and fasten the driver to the cabinet interior with screws or Velcro to prevent strain on the plug.
[Illustration: close-up of hands connecting low-voltage wires to driver with connectors]
Step 7: Final testing and tidy-up
Plug in the driver and test all pucks for consistent brightness and color; allow lights to run for 10 minutes to verify thermal behavior. Use cable clips to hide any visible wiring, trim excess leads, and replace cabinet contents; label the plug or keep the driver accessible for future troubleshooting.
[Illustration: lit row of under-cabinet pucks with tidy hidden wiring and a person checking them]
- Choose pucks rated 12V or 24V to match the driver and keep total puck wattage below the driver’s capacity by at least 20%.
- If using adhesive, press adhesive mounts for 30 seconds and wait 1 hour before stressing them; use screws in humid or oily environments.
- Consider adding a dimmer-compatible driver if you want adjustable brightness; confirm driver-dimmer compatibility before purchase.
- Use cable clips every 6–8 inches and conceal wires along cabinet seams to keep the look tidy and reduce snagging.
- Label the driver or plug with a small tag like “Under-cabinet lights” to avoid accidental unplugging.
- When planning, leave 6–12 inches extra cable at the driver end for easier future changes or replacements.
- Do not splice pucks directly to household 120V; always use the low-voltage plug-in driver supplied or rated for the puck system.
- Avoid mounting on unstable or overheating surfaces; keep pucks away from heat sources and do not cover vents to prevent overheating.
- Turn off and unplug the driver before making any wire changes or reworking connections to avoid short circuits or burns.
- Do not exceed the driver’s wattage rating; overloading can cause driver failure, reduced lifespan, or fire risk.
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