The XL 150 installation housing is used for installing LEDs, low-voltage halogens, energy-saving lamps, metal halide lamps and compact fluorescent lamps. The installation housing is suitable for lights or loudspeakers with a maximum installation diameter of 135 - 140 mm. An absolutely concrete-tight and safely strain-relieved pipe entry without tools is possible for pipe sizes M20, M25, M32 and M40 thanks to the Primo membrane technology. There is a mini transformer directly on the box, which can be extended by 126 mm using the universal P873 transformer tunnel. The optional transformer tunnel offers space for the installation of additional electronic components. The installation housings are nailed to the formwork in the in-situ concrete or attached to the steel reinforcement with the separately available wings. In the precast concrete plant, the lid is flexibly positioned on the formwork table with a magnet without leaving any adhesive residue. The mineral fiber board allows individual borehole openings so that the alignment line is perfectly maintained even after the concrete has been poured. The covers with a fixed installation diameter are opened with a hammer.