An electric switching device , filled with a dielectric insulating medium, comprising at least an arrangement of arcing contacts with a first arcing contact and a corresponding second arcing contact , wherein for opening and closing the electric switching device at least one of the arcing contacts is movable parallel to a longitudinal axis (z) and cooperates with the other arcing contact , further comprising an insulating nozzle , an arcing volume between the first arcing contact and the second arcing contact , an exhaust volume and an exhaust tube , wherein the exhaust tube is arranged in extension to the first arcing contact , in particular hollow tulip contact or hollow pin contact, along the longitudinal axis (z) and connects the exhaust volume with the arcing volume for evacuating at least a part of hot dielectric insulating medium into the exhaust tube , the exhaust tube further configured either that: a diameter of the exhaust tube increases, at least along a section (L1) of the exhaust tube , in longitudinal direction (z) away from the arcing volume , the exhaust tube comprises a plurality of exhaust tube openings through its wall, which connect the interior of the exhaust tube with the exhaust volume , wherein at least a part of the exhaust tube openings have different sizes; wherein the exhaust tube openings of the exhaust tube are arranged in rows extending in longitudinal direction (z), wherein the rows are distributed on an entire circumference of the exhaust tube , particularly wherein a number of rows ranges between 2 and 6 rows wherein, at least along the section (L1) of the exhaust tube , in longitudinal direction (z) away from the arcing volume , the cross-sections of the exhaust tube openings attributed to one row decrease for all rows in longitudinal direction (z) away from the arcing volume , or the exhaust tube further configured that: the exhaust tube comprises a plurality of exhaust tube openings through its wall, which connect the interior of the exhaust tube with the exhaust volume , wherein at least a part of the exhaust tube openings have different sizes, and the exhaust tube comprises a plurality of exhaust tube openings having increasing cross-sections in longitudinal direction (z) away from the arcing volume and the diameter of the exhaust tube decreases along said section (L1) of the exhaust tube . a diameter of the exhaust tube increases, at least along a section (L1) of the exhaust tube , in longitudinal direction (z) away from the arcing volume , the exhaust tube comprises a plurality of exhaust tube openings through its wall, which connect the interior of the exhaust tube with the exhaust volume , wherein at least a part of the exhaust tube openings have different sizes; wherein the exhaust tube openings of the exhaust tube are arranged in rows extending in longitudinal direction (z), wherein the rows are distributed on an entire circumference of the exhaust tube , particularly wherein a number of rows ranges between 2 and 6 rows wherein, at least along the section (L1) of the exhaust tube , in longitudinal direction (z) away from the arcing volume , the cross-sections of the exhaust tube openings attributed to one row decrease for all rows in longitudinal direction (z) away from the arcing volume , or the exhaust tube further configured that: the exhaust tube comprises a plurality of exhaust tube openings through its wall, which connect the interior of the exhaust tube with the exhaust volume , wherein at least a part of the exhaust tube openings have different sizes, and the exhaust tube comprises a plurality of exhaust tube openings having increasing cross-sections in longitudinal direction (z) away from the arcing volume and the diameter of the exhaust tube decreases along said section (L1) of the exhaust tube . <EOS>