DIN 49073

Metal boxes and boxes of insulating material for recessed mounting for accomodation of accessories up to 16 A 250 V and socket-outlets according to DIN 49445, DIN 49447 and DIN EN 60309-2 (VDE 0623-20) up to 32 A 690 V – Main dimensions
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 09/01/2007