Spelsberg not only has junction boxes in flush-mounted and surface-mounted design, but also has hollow wall junction boxes in its range. The HWK series junction boxes are flame-retardant and suitable for plate thicknesses up to 35mm. With the Spelsberg junction boxes the installer gets a patented lead-in system with strain relief. Connection cables can be conveniently inserted from above. The hollow wall junction boxes are used when lines up to 2.5² or data lines have to be split. The junction boxes for hollow walls are available in several heights. Switches and socket outlets are used.
