Hi! I have one question. Assume a source of about 20KV and 4 Amps. This source needs to be connected to a transformer in order to vary the voltage and current into desirable amounts. The ideal transformer takes the input power and gives out the same power as output. My question is: I know that the voltage comes out of the "pole pig" tranformer outside our houses is 240 V, how much is the current? 20A ? Where does the line go after that? into the switch board of each house? Is there any other transformation made within the house?