Installing and connecting led spotlights properly

Energy efficiency and feel-good light – LED spots shine just as beautifully as conventional incandescent lamps, while consuming 80 percent less electricity and can be used both for uniform basic lighting and for accentuated lighting of specific room zones and objects. In addition, the recessed spotlights are very easy to install. We will show you step by step how to install with confidence.

Tools and materials

The easiest way to install ceiling spots is in suspended sheetrock, resp. Install plasterboard or panel ceilings. When installing in concrete ceilings, the planning should already be done in the construction phase and cavity sockets and cable ducts should be integrated into the concrete ceiling at the factory.

The following tools are required for installation in a hollow ceiling:

  • slotted and Phillips electric screwdriver
  • Phase tester or two-pole voltage tester
  • Folding rule and pencil
  • string or wire
  • Drilling machine
  • Hole saw
  • Drilling machine
  • Jigsaw

For the LED ceiling spots you will need:

  • LED bulb
  • Light bulb socket
  • recessed light
  • Transformer (optional)
  • interlinking cable (several spots)

Step by step instructions for installing and connecting ceiling spots

Step 1: Switch off the fuse and disconnect the power supply

To avoid electric shock – before connecting the lights to the mains – be sure to switch off the fuse. Make sure that the current cannot be switched on again accidentally, for example by taping off the fuse.

Please observe the VDE guidelines.

Then, for safety’s sake, check again with a phase tester or a two-pole voltage tester and make sure that there is actually no voltage on the line.

We would like to point out that the absence of voltage cannot be clearly determined by measuring with a phase tester in the form of a screwdriver.

If you are a layman or if you have any doubts, please consult an electrician.

Step 2: Wiring for 230V LED recessed spotlights without transformer

In the case of suspended ceilings, the cable, or. the interlinking cable is laid in the ceiling cavity. For 230V LED spots, you usually use a three-core cable with a cross-section of 3 x 1.5 square millimeters:

  • blue cable / neutral conductor (N)
  • green-yellow cable / protective conductor (PE)
  • brown or black cable (live) / phase (L)

The wiring is built up in parallel connection:

Wiring 230V recessed spotlight without transformer

Connect your 230V cable to the first lamp socket using a luster terminal (example GU10). Here, "L" and "N" are first connected to the two wires of the lamp socket. The protective conductor "PE" is attached to the lamp housing itself. For this purpose, the housings are equipped with an earthing terminal. To continue sanding to the following spots in parallel connection.

Since the green-yellow cable "PE" is responsible for conducting the contact voltage at the conductive metal housing to earth (grounding), this can be neglected for lamps with plastic sockets or for lamps marked with "Protection Class II" (). In this case, the protective conductor can be inserted directly into the luster terminal and tightened.

The common lamp sockets for 230V spotlights are: GU10, GX53, G9, E27 and E14.

Step 3: Wiring for 12V LED recessed spotlights with transformer

connect the main power cable 230V (L/N) to the primary side (230V) of the transformer. For this purpose there are already integrated terminals, which are built into the transformer. If you have only open cable ends at the transformer, use luster terminals for connection. The protective earth conductor (PE) does not need to be clamped down.

To connect the 12V LED spots to the secondary (12V) side of the transformer, use a two-wire cable. The cable cross-section to be selected here depends on several factors: Length of the supply line, wattage / power of the illuminant, max. tolerable voltage drop in power etc. Wiring is also done here (as in the 230V range) in parallel connection.

Wiring 12V recessed spotlights with transformer

Our LED spots are usually equipped with a rectifier. This means that the polarity does not matter when connecting the LEDs (so you don’t have to pay attention to plus or minus here).

For our spots, we also offer pre-assembled cable harnesses (z.B. a 5-piece wiring harness for five 3W LED spots or a 3-piece wiring harness for 3 x 5W LED spots).

Small tip: Remember the exact placement in order to be able to carry out a possible exchange of the transformer still after years.

The usual lamp sockets for the 12V systems are: GX5.3/GU5.3, GU4 and G4.

Step 4: Placement of the recessed spotlight

If you have determined the desired placement of the spots after laying the cabling, you should definitely also pay attention to the respective installation depth of the ceiling spots. The installation depth of our products varies – depending on the model – between 30 and 90 millimeters.

Step 5: Sawing out the installation hole

The recess for round LED recessed spotlights is sawn out with a hole saw, in conjunction with a drilling machine. You can achieve angular recesses by pre-drilling the area required for the recess at the corners with a drill and then sawing it out with a jigsaw. Please note that there is no standard size for the hole opening of the LED spots. Again, the opening varies – depending on the model – between about 30 and 120 millimeters.

Step 6: Install ceiling spots

Press the clamping springs / mounting springs of the recessed spotlights upwards and insert them into the hole bore. The clamping springs now lay on your ceiling from above and thus generate a stable and secure hold.

Now remove the clamping ring or glare ring of the ceiling spotlight, pull the lamp socket through the recessed spotlight and insert the selected light source into the socket. Now push the lamp back into the hole opening and reattach the clamping ring from the front. The installation is now complete.

Installing recessed spotlights

Step 7: Switch on fuse and align recessed luminaires

Once the recessed lights are mounted, you can switch on the fuse again and align the LED spots as desired.

If you have any further questions about mounting or our products, please do not hesitate to contact our service team at any time. We will be happy to help you!

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