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Wire size for 100 amp entrance4/11/2024 ![]() I avoided using Aluminum as I worried it would be difficult running the wire due to its larger size and thought it may be an inferior and frowned upon wire, kind of a “only if you have too” wire. Now you need 1 space per pole (so 2 spaces per machine).Ĭlick to expand.Thank you, this is really helpful. That was true in the 1970s but the world changed. Oh, and when they say " 20 space 40 circuit" the circuits number is bullpuckey. Remember everything you're talking about will chomp spaces 2 at a time. My go-to for subpanels is a 30-space, but 40 isn't that much more. "I can save money by going with a smaller PANEL" -> dear God, please don't! The #1 panel problem we see is "my panel is full, all the breaker spaces are used and I can't add this new thing." That is every easily avoided by getting a nice, ridiculously large panel (in terms of number of breaker spaces). That stuff is so cheap feel free to go big. "I can save money by going with smaller WIRE" -> you can save money by going with aluminum wire. ![]() So if you have a 60A car and a 40A car and you want them to share 80A, that's possible with Share2 EVSEs. That means you can jumper it for the current you have available, and it will tell the car to draw that much.Īnother tech note to think about is that "Share2" class EVSE's can talk to each other and get the cars to share a single pool of current. **EV charging is dynamically adjustable by the EVSE (wall unit). The current "state of the art" is 60A circuit, however as larger EVs show up such as the Rivian, Lightning and the like, 100A circuit is the emerging top tier. As such a significant amount of oversubscription is OK.ĮVs are a special rule, though. I generally use machines one at a time, with the exception of compressor + tool that uses air. Whoever you're talking to, surely they mean that. When you say 2-2-2-4, well, 2-2-2-4 aluminum MH feeder is common, and dead-nuts correct for your application. If your service (what the power company gives you) is >100A this exception does not work for you. #2 aluminum is an extremely popular size, because a special exception in Code allows it to be used for 100A services which power a dwelling. Yes, there was a "thing", but it doesn't relate to large wires, for known reasons. There is nothing wrong with aluminum wire at these large feeder sizes. That would be #4 copper, or #2 aluminum for 85A or 90A, respectively. Good or bad, doesn’t matter id love to hear it. And I can save some money by going with a smaller wire and panel.Īny thoughts on any of the above is appreciated. I ask because most people I’ve talked to have said I may be overshooting my target with this project. My question is, does a copper 2-2-2-4 wire sound correct for an 80amp subpanel 100ft away from the main panel? And is 80amps overkill for the items im attempting to supply power to now and in the possibility future? In the future I may add a 230VOLT compressor and a EV charger, so im shooting for an 80amp subpanel to leave my options open. Im hoping to power a Bridgeport Mill (5.6amps), a Leblond Lathe (2.2 Amps), and a 220volt welder. Using this website ( 100 Amp Wire Size: Which AWG Wire For 100 Amps? (NEC Code)) I’ve calculated that I will be needing to use a 2-2-2-4 CU wire that can handle 115amps. The garage is attached to the home but is on the far opposite corner of the house from the main panel.If I run the wiring internally through the walls and attic I’m measuring a 100ft run. I’ve been doing som research to install an 80amp subpanel in my garage.
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