Electricity WOW!!!!

We are at the point the electricity needs to be brought in before we pour the cement floor .
In our area the electric company first strung the line to our transformer. This can be either the round barrel like box up on the pole or a box on the ground if you have the line buried.
We decided we did not want the line going overhead across our land. ( we would have needed to cut down trees in a 30 ft wide path from the border of our property to where we wanted service) So we chose to have the line go 300 ft overhead along the border then go 200 ft underground to the service panel. This is done with a dip pole that brings the electricity from overhead down the pole through the under ground conduit to the transformer. It is more expensive to have them bury the line and the ground transformer cost more , but it is well worth the difference!
Then an electrician came out and placed the meter on the side of our building with the main panel. He then fed the wire through the conduit connecting the transformer to the meter and panel. We used 1(0) 3Wire copper per the electric Co specs, the wire has to be large enough to handle the electrical load with-out overheating. this wire is categorized by the thickness, the thicker it is, the smaller the number, thus a (0) size is larger than the #1 size and the three wires are for 1) the hot wire: carrying the electricity, 2) the neutral wire:cycling the unused electricity back to the source 3) the ground wire: if the first 2 don't work properly this will route the electricity to the earth out of harms way.
Then the electric Co came back and connected the line through the transformer to the wire our electrician placed to the meter/panel. The transformer does just that: it transforms the high voltage electricity (10,000 volts) down to 120 volts.