I am trying to figure german supply voltage for a 12vdc LED project to be used in Berlin. All research shows 240v/50Hz line voltage. My question is the two types of plugs used; type C, or "europlug" which is a 2 pin unpolarized, ungrounded plug. The second is Type F or "Shucko" plug which is a 2 pin & ground. Because of the unpolarized type C plug how do I wire the 230v transformer? How do I determine neut. vs. hot? I won't be present when this is powered in Berlin.