Double-pole contact inserts with protective contact for watertight plug and socket devices – DC 10 A, AC 16, 250 V
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 03/01/2016

Double-pole contact inserts for watertight plug- and socket devices with earthing contact, 10 A d.c., 16 A a.c., 250 V
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 06/01/1993