You can check the type of mains connection in 3 ways:

Option A: based on the meter and fuse box. This takes into account the number of connected phases (2, 3 or 4) in the meter cupboard and the width and type of the machine in the meter cupboard. See also photos below
​Option B: by checking your last electrical inspection report. The type of mains connection is also always noted here.
​Option C: by contacting the grid operator by telephone based on address, EAN number or meter number. Fluvius (Flanders): via 078 35 35 34 -> follow the drop-down menu for technical questions.