Build LED Under Counter Lighting that ROCKS!


Step 7: Installation

Open the AC breaker supplying the existing lights and remove the old fluorescent lights (if you have them).

OK, I first mounted the angle aluminum up against the back of my cabinet. This posed two problems. First is the AC power wires came out of the wall where I wanted to mount the lights. Second, after mounting a set I found that butted up agains the wall, there were spots in my kitchen, specifically while seated at my kitchen island, you are in direct line of sight of the LEDs and they were bright! This would not do! I did a little experimentation and determined that moving them forward just a few inches made all the difference. To allow me to permanently mount them this way I bought a 4 foot piece of 3/8” PVC pipe from lowes and cut a bunch of 2-1/2” pieces. Then I mounted them using 3” drywall screws. This gave me space behind the lights to tuck away the AC power leads and get them flush agains the cabinet bottoms.
After mounting the Lights, take the J-Box and mount it on the bottom of the cabinet using a short wood screw or two and the holes already in the bottom of the J-box. Route the AC power around the LED lights and connect it to the existing AC wires Black to Black (Hot) and White to White (Neutral) DO NOT FORGET THE GROUND WIRE! For the DC connections, cut the wires to appropriate length so you can tie wrap them back or tuck them in and solder to the LED strips see the schematic for details. After double checking everything, shut the circuit breaker and turn on the power. You should have a beautiful light! If not it is trouble shooting time. If everything works, turn off the power and carefully put the metal cover on the J-box. Continue for each power supply and light section. I used one power supply for every three sections of 8 LED's this gave me five total for my project. I had one small section of a cabinet that only had 12 inches of space. I used a string of 6 LED's and an 18VAC secondary transformer.  
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