I'm looking at a job where the customer wants a single phase, 240V, 600A panel at about 800-900 feet. After playing with the voltage drop thingies, the best scenario seems to be using a transformer to up the voltage to 480V at the beginning point and another 480V to 240V transformer at the other end.
That would require 300A at full load and I can get away with 3 sets of 250XHHW AL. Without the transformers it's an UNHOLY AMOUNT of parallels(like 9 or 10, and I AM NOT PULLING 900 feet bigger than 250).
My question is: If I use a 100% neutral transformer at the far end(where I change back to 240V), do I REALLY need to run a neutral between the transformers? As far as I can tell the answer should be no, but I just wanna make sure. I mean we're looking at roughly 3000 feet, so even at a dollar a foot for AL it's still 3K dollars.
That would require 300A at full load and I can get away with 3 sets of 250XHHW AL. Without the transformers it's an UNHOLY AMOUNT of parallels(like 9 or 10, and I AM NOT PULLING 900 feet bigger than 250).
My question is: If I use a 100% neutral transformer at the far end(where I change back to 240V), do I REALLY need to run a neutral between the transformers? As far as I can tell the answer should be no, but I just wanna make sure. I mean we're looking at roughly 3000 feet, so even at a dollar a foot for AL it's still 3K dollars.