Or worse, just cut the wire in a failed attempt to do that, and leave you 6 inches short on a 1000' run.įor this reason, I would definitely bring the conduit to a wiring trunk a short distance from the house and remote site, bind the wire in some way so it can't be pulled out (or so the short bit pulls out), and then bury and hide the trunk. If you work in conduit, it is a foregone conclusion that some hick will break into your remote service panel, cut your leads, tie 'em to his truck's ball hitch, drive away with your 1000’, and spend the month trading chunks of it for meth. Conduit can be covered 18" (plastic or EMT) or merely 6" (rigid or IMC conduit). Direct burial must be trenched 27" to allow 24" cover. There are two ways to go: direct burial, or conduit. This will be its own full and proper service, and it will absolutely depend on local grounding at the house, but that was already required. There is no value whatsoever to grounding your house to a point 1000 feet away. There is no point running a ground wire 1000 feet, even if this wasn't a double-isolated, doubly separately derived service, which it certainly is. I wasn't able to find any wires in the 6-7% voltage drop range, because the next smaller wire was giving 8-10% voltage drop. Here, it seems like the winner is #1 aluminum if you intend to fit 200A service in the future, otherwise #4 Al. WOW, that savings on wire is huge, and way more than pays for the transformers in all cases. 4 AWG aluminum at 5.05% voltage drop, $ 500Ħ AWG copper at 4.89% voltage drop, $1,100ġ AWG aluminum at 2.68% voltage drop, $1,000ģ AWG copper at 2.60% voltage drop, $2,000 We still get to derate 83%, giving 32.75 amps. 240V to 600V (the max for common wires) drops current to 40A. If we double from 240V to 480V, current halves from 100A to 50A. In between the transformers, voltage is stepped up, which means current steps down by the same proportion, so volts x amps still yields the same. These transformers are about $1,000 each for ones ample to your current draw. We will use two transformers back to back. Now, we can ease the pain by stepping up the voltage for the long haul. Voltage drop is proportional to actual current being flowed at the moment and has nothing to do with nameplate ratings. Start a Kickstarter and let those people pay the cost differential!Īll these wires will also accept 200A service. Other people are really hung up on using aluminum nowhere ever, and ignoring the actual facts. Some people are really hung up on 3% voltage drop. Traditional, aka "nobody ever got fired for recommending this"ġ000 feet underground, split phase 120/240V service, 3 wires, this is the main service to the house (so we get a favorable 83% derate on NEC 310.15b7, so calculating for 83 amps).
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