Then you're at a checkpoint, where you can either decide to self-pull wire or just bring in an electrician for the coup de grâce. You get to work in small segments, and you get to iterate at your leisure - post pix and get feedback - until it is perfect. It's vastly easier, safer and more novice friendly than trying to wrestle a 150 foot long alligator. It could even support as large as 3/0 wire, to support next year's EVSE :)Īnd no offense, but for green novices, I like the idea of having you route empty conduit. At some future point, you'd have no trouble pulling 2x #1 aluminum, since the pipe is oversized. For 50A, pulling #8 copper wire will be trivial in such a large pipe. That allows the higher temp (smaller) wire. (with access points as needed for pulling, typically at corners). I would lay 1-1/4" conduit, as a continuous pipe from panel to EVSE socket. If you only wanted 50A, then #4 aluminum would do, unless it was in certain wiring methods which would permit 75C running, then #6 aluminum would do. Even #6 Cu is large enough that you should seriously consider aluminum instead. Nobody uses copper for runs this large and long. #1 aluminum will support that future 100A charger just fine. Can you say with a straight face that you'll never want the bigger "100A" charger? Well, then, might want to run that #1 after all.
Here's why: Tesla keeps making the chargers bigger. Your idea of going bigger is on the right track, though. If they require #6, then that is the last word on the subject. Just the same, look at the UL-approved instructions. At 150' your 39A-actual charger will get 3.45% voltage drop, which is perfectly acceptable. In fact, you can use #8 wire for 50A under certain conditions (NOT NM/Romex nor UF-B). (It's probably 12/24V).įor 240V circuits, I don't even bother to crunch the numbers until the run is 180' or more.īut even if we're operating under the rules of the oppressive Canadian regime, #6 is good for 204 feet, eh? The chart is fatally flawed: it fails to state supply voltage. How is my understanding incorrect, and what gauge wire is actually needed for a 50 amp 14-50 outlet? Given the clash between my internet-educated understanding, and Tesla's official publications probably written by electrical engineers, I have a feeling that the incorrect party might just be me. According to this chart, 6 gauge wire would only be sufficient out to 15 ft for 50 amps (or 50 ft if we allow for 10% voltage drop) neither of which is close to the 150 feet suggested by Tesla. If I want a 3% voltage drop (which I assume an electric car would need), then I should be using 4/0 at least. Using these charts to spec out a 150 ft circuit, even allowing for a 10% voltage drop, I see that I need at least 1 gauge wire for 50 amps. However, when I search online for AWG charts, I find many results that all agree with each other, such as this one from here: Tesla has published installation instructions here that recommends 6 AWG for up to 150 feet. I thought I understood the correct wire to use, but then ran across a Tesla document that said something completely different than I was expecting.
#WIRE GAUGE FOR TESLA WALL CONNECTOR INSTALL#
Installation costs vary greatly based on the location of your electrical panel versus where you want the charging station.We are looking to install two NEMA 14-50 outlets for our kids to charge their electric cars, and I'm confused about wire choice. Tesla offers installation in certain markets, but most master electricians are qualified to install electric vehicle chargers. Keep in mind that your Wall Connector needs to be installed by a qualified electrician. Unlike the other chrome version of the charger, it doesn’t seem to be available with a 8.5′ cable and instead, only the 24′ cable appears to be available on the website. That said, it also depends on your own needs, and many people don’t really need that kind of charging power for overnight charging. Recommended circuit breaker for max charge rate with Wall Connector Tesla offers its own recommendations per model: Model Like Tesla’s previous Wall Connector, which is still available for sale, the device is $500, which is fairly cheap for a charger of that capacity (up to 90 amps).ĭepending on your vehicle’s onboard charger and the circuit breaker on which the Wall Connector is installed, you will have different charging capacities from ~35 km (22 miles) per hour to 93 km (58 miles) per hour. This new version features a more glossy finish than the matte black of the Signature version, hence the name.
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