When I go by tram, I look it's upwire service. I find at rare places very old forgotten electric service too. It is from the first electrify too. I have not looked this like service ever, I very surprised, but I have a very nice PHOTO!! The Insulators are very old and I don't have yet... It was worked with 110 V at that time with copper wires, when started the cooperation, it took up the 220 V.