I am doing a 400 amp service on top of a mountain in north carolina, it is for a house. I am not sure yet if thier is 3 phase available at the road where thier driveway starts, but I highly doubt it. I need some input on this, it will have to be inclosed in pvc conduit for protection. I was thinkink of running a high voltage feed to the top and terminating it into a transformer with 120/240 secondary, what do you all think and where can you buy a transformer of this size??? any help would be great