Re: what size wire does your power co use?
In the lower NYS area, you can see 2 AWG from the POCO. Depending on the field rep, today we see anywhere from 2 AWG to 2/0.
Years ago, we could ask for just about any size service to a building, within reason. Today they want a load calculation and have tightened up the allowable size service... the reason is the concern for the lack of power available in certain grid zones. It never ceases to amaze me how the POCO can supply what seems like unlimited power - with all of this new building in the last 15 years.