I'm renovating a 1978 house that currently has 100 amp service. I'm not sure what size wire is going from the transformer to my house. But the 3" conduit will support up to 320 amp wiring/service. In order to get bigger service, I will have to dig up/replace the 3" conduit. The house is 1900 square feet plus about 400 square foot of basement/temp shop. I will be getting a large shop in the future. It will get a lift and hopefully before I die I can find a reasonable price mill or lathe I'm being told the current transformer is 10kva and it is being recommended I go to 25kva. I will double check but I believe I'm the only one on the transformer... mountain house So the basic question I have is: Is my electric company trying to pull a fast one on me?