There's an old US base here in Crete, 20 km from the city I live (Iraklion, Crete, Greece) in Gournes. It was decomissioned at the end ofthe Cold War, in 1991. Originally it was wired for 110 Volt, complete with US distribution panels and 4150/110 volt transformers. When I was working as an apprentice for a company that did public contracts (a public contractor?) we were rewiring a building for 220 volts and modern structured cabling. I learnt much on the way. Now I'm wondering, this US base was draining the Cretan grid, from MV (15 kV at the time) and 50 Hz, of course. Their equipment came from the USA. Did they use special equipment for 50 Hz, or did they use generic 60 Hz US equipment and it worked OK?