Universal mounting enclosure with additional connection space (e.g. for installing an electronic safety transformer) for pre-cast concrete structures, halogen-free, for installing LV/HV/LED luminaires and speakers. Suitable for subsequent installation in prefabricated ceilings 45-70mm with 150mm core drilling, for the installation of VDE-approved lights per DIN EN 60598 (VDE 0711), as well as with F identification or MM identification, max. installation height LV lights: 105mm, HV lights: 110mm, lamp output max. 50W, selectable outlet aperture: Fermacell(R) plasterboard, variable up to 100mm, 8 combi-conduit entries 4 x M20, 4 x M25, integrated conduit stopper for conduits M20, M25