Unusual hardware for this Richard Ginori spook insulator, with the third hole (I don't know what's for): the wire arrived directly on the hardware and over the top there was a fuse, so that all the grooves were free from the copper. In the abandoned factory we got three of these, one damaged (and not rescued), used on the three phases of the line, while the fourth wire had an ordinary MIVA BT 2 BIS (see other pic).