I just got a few s7s up and running in my home here in the US, I had to use an adapter to get power from the 220v washer and dryer plugs to a PDU and that's got the normal outlets to power the antminer 1600w psus. Since you have an electrician you're working with, you probably won't have to worry about adapters but this is the PDU I used.
http://www.amazon.com/Tripp-Lite-PDU1230-L6-30P-Horizontal/dp/B0007YG85A/ref=sr_1_1?s=electronics&ie=UTF8&qid=1454082091&sr=1-1&keywords=tripp+lite+pdu+1230