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Install Wall Connector before or after receiving car?

Discussion in 'Model 3: Battery & Charging' started by James K, Apr 30, 2018.

  1. James K

    James K Member

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    I'm looking to take delivery of my 3 in about a month and want to have my charging setup ready. In my 2 years of anticipation waiting for this car, I already had an electrician install wiring terminated to a NEMA 14-50. But I was foolish and didn't consider that I might be plugging and unplugging this in the rain, because the charger is in an outdoor location. I have decided to go for the HPWC, and now I'm wondering when is a good time to have the electrician come swap out the 14-50 to the HPWC. Should it be done before or after I have the car?

    I want to have it done as soon as possible so its ready, but I'm wary that I can't test that the HPWC will be functional and installed correctly until I have the car to try charging with it. Is this something that can normally go wrong, or is swapping the outlet from the 14-50 to the HPWC pretty straightforward and I should just have it done before my delivery? Note I also have not tried whether the 14-50 is functional (I was told it is, but have never used it).
     
  2. brkaus

    brkaus Well-Known Member

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    I’d wait. You have a working solution, so you can already charge.

    Might as well wait.
     
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  3. TT97

    TT97 Active Member

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    I had my HPWC installed when I added solar to my house a couple months ago (and currently waiting for my 3 to be delivered). Every morning I walk into my garage and I see that little green light on the HPWC mocking me that I am still driving an ICE!

    As you do not know if the 14-50 is functional yet, I would wait so you can test the outlet first with the UMC and then convert to the HPWC - if something is amiss in the set-up, it will be easier to identify where the issue lies.
     
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  4. SDKoala

    SDKoala Model 3 LR RWD

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    If you know you're going to get the HPWC, there's really no reason to wait, especially if you're not sure the 14-50 is functional. Any electrician should be able to ensure the circuit is working before altering it. Also keep in mind that there may be a delay in getting the HPWC from Tesla. I don't know how it is now, but it took about 2 weeks to get it from Tesla, then I had to wait another 2 weeks for the electrician I hired to be available for the job. I didn't think to do any of this until after being invited to configure and the installation was done just a few days before I took delivery.
     
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  5. TechVP

    TechVP Active Poster

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    Maybe you've already done this, but I would check w/ the Electrician who installed your NEMA 14-50 --- see if your wiring (the part he did) is the correct gauge to convert to a HPWC? In most cases, you'll need heavier gauge wire for the 72A the HPWC can pull. Which may have not been allowed for. Essentially the HPWC requires 2 gauge or larger (there is a 20% overage rule to consider). Codes vary based on municipalities, so check w/ your local electrician.

    -TechVP
     
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  6. Rocky_H

    Rocky_H Active Member

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    None of this is true. The wall connector does not "require" a high amp circuit. It can be selected to run on circuits as low as 15A. It can be on the existing 50A circuit that the 14-50 outlet is currently on. No wiring change is needed.
     
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  7. skitown

    skitown Member

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    Yup. I had my HPWC installed on the same 50A circuit and had my electrician leave the NEMA 14-50 outlet in place so I could use it if the HPWC ever had an issue.
     
  8. pilotSteve

    pilotSteve Active Member

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    apples and oranges here..... the HPWC can be set (dip switches) to deliver a range of power depending on what amperage you supply it. However.... if you want to have 80A max available then you do need to upgrade wire from that required of a 14-50.

    So: if you want the easiest install, set HPWC to whatever your wiring and breaker allow; if you want to fastest charging possible, the upgrade the wiring (if needed) and install a 100A breaker. Your choice.
     
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  9. skitown

    skitown Member

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    This is true.
     
  10. TechVP

    TechVP Active Poster

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    The replies are correct, current draw is selectable. Follow the advise of your local municipal codes & your electrician.
    My comment is about dialing in on the High Power benefits of the charger.
    Being a Model 3 forum, consider the advise of other owners first.
    -TechVP
     
  11. Rocky_H

    Rocky_H Active Member

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    Of course, but one of those fruits is this misinformation that the wall connector can only be installed on high amp circuits, which I see people saying from time to time, and people need to get accurate information, that there are other options.
     
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  12. mongo

    mongo Well-Known Member

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    Assuming they installed the outdoor outlet with a GFCI breaker, I'd suggest upgrading to the HPWC now to avoid plugging/ unplugging cycles and potential nuisances GFCI trips. Invite a fellow NY TMCer over to test it.

    See this thread for possibly relevant details:
     
    • Informative x 1
  13. Moderatefan

    Moderatefan Member

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    Consider whether you want wiring/breaker swapped as well.
    14-50 gives you 40amp continuous and M3 LR can charge @48, which means 60amp wiring/breaker (vs 50amp for 14-50).
    Not much difference for a single car, but you may just not be using HPWC at its full capability.
     
  14. James K

    James K Member

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    Thanks everyone for all the tips. I'm gonna get in touch with my electrician to swap to the HPWC soon. When I initially did the install, I gave the electrician the spec sheet for the HPWC and said I wanted wiring to eventually upgrade to this, but for now I just want it terminated with a NEMA 14-50, so hopefully he used a large enough gauge. The difference in charge rate hopefully won't be too much of a concern for us as we don't drive too often (we're in NYC ). Just out of curiosity, how would I be able to tell if my outdoor outlet is GFCI? I know for household outlets, they have a little light, but not sure how to spot it on a NEMA 14-50.
     
  15. mongo

    mongo Well-Known Member

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    The outlet will be standard.The breaker will have a TEST buttom (image in thread I linked to above)
     
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  16. James K

    James K Member

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    Got it, just finished reading that thread and it answered all my questions. For the record here, my breaker doesn't have a TEST button, so it appears it is not GFCI. I'll be switching it to the HPWC anyway, so it shouldn't be a problem (according to that thread). Thanks!
     
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  17. bmah

    bmah Moderator, Model S/X, California Forums

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    Either way, if you absolutely want to be sure that your charging setup works, just invite a friend who owns a Tesla over to grab some electrons from you. Did that with the (first) NEMA 14-50 outlet in my garage, so I knew everything was ready when my car arrived.

    Then you go back to waiting. :)

    Bruce.
     
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  18. j0urn3y

    j0urn3y Member

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    I just had a NEMA 14-50 installed in advance of receiving the car.

    I'll use the mobile charger for a bit then decide on the Tesla wall charger but it's positioned to go next to the NEMA so either can be used.
     
  19. RTPGiants

    RTPGiants Member

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    I decided to go for an HPWC because the cost was basically only the difference of the HPWC vs. the outlet (industrial multi-cycle ready 14-50 is about $100). Main reason for me was that I would end up buying a 2nd mobile adapter anyway because it seems like a good idea to just always have one in the car and never have to move it. That's $300, so basically cost difference ended up being about $100.

    If I had my choice, it'd be installed within a day or 2 (either side) of the car, but because Tesla's been a bit slow in their window, the connector will proceed the car by about a month. On the plus side, if they run into any issues there's plenty of time to sort it out. And the company is one of Tesla's recommended, so I assume should charging somehow not work when the car arrives, I won't have any real issue with getting them to fix it.
     
  20. Big Dog

    Big Dog Member

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    I waited until the car was scheduled for delivery to maximize the warranty on the WC. (had the electrician put in a 60 amp circuit in a sub-panel.)
     

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