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What size wire for HPWC install?

Discussion in 'Model S' started by KCKIWI, Dec 28, 2016.

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  1. KCKIWI

    KCKIWI Member

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    I've read in other threads that Manual states it should be 2 AWG but I can't find that anywhere? Can someone point me in the right direction?
     
  2. bishoppeak

    bishoppeak Member

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    Page 19 of the new style HPWC manual:For 80A operation, use 2AWG 194°F (90°C) rated copper wire or follow local regulations.
     
  3. NickF

    NickF 75D

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    All depends how many amps you want. There are other factors but 6AWG is common for 50Amp circuit (40 amp charging continuous). This is plenty for overnight charging. The wall connector will work with whatever you give it. You just have to set the dip switch to match your amperage.
     
  4. KCKIWI

    KCKIWI Member

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    IMG_0572.jpg
    So is this the old one then?
     
  5. bishoppeak

    bishoppeak Member

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    Yes, the new manual says "side mount"
     
  6. KCKIWI

    KCKIWI Member

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    What's the difference between old and new versions?
     
  7. bishoppeak

    bishoppeak Member

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    I've only got the new one. I think there has been some discussion here about that.
     
  8. KCKIWI

    KCKIWI Member

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    I have Gen 2, is that the old version?
     
  9. KCKIWI

    KCKIWI Member

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    I took this off the current manual on Tesla website, where is the newer manual posted?
     
  10. HX_Guy

    HX_Guy Member

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    I just did a self install of the Tesla wall charger this past weekend, there's a thread here: Self installed Tesla Wall Charger...

    Does your car have the 48A or 72A onboard charger? If the 48A, then all you need is 6 AWG line wires and 10 AWG ground.
     
  11. KCKIWI

    KCKIWI Member

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    Only has 48A but may upgrade in the future. Want to make sure I future proof it so I'm not redoing it down the road.
     
  12. CmdrThor

    CmdrThor Active Member

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    The manual recommends 2 AWG or follow local regulations. The NEC allows 3 AWG for a 100 amp circuit if you are using THHN wire in conduit. I cannot speak to your local regulations but I used 3 AWG wire and have my Wall Connector set at the 80 amp continuous / 100 amp breaker setting. I only ever use it at 72 amp since I have a Model X with high amp charging, but I hope in the future to have another Wall Connector on the same circuit to charge a Model 3.
     
  13. SMSMD

    SMSMD Active Member

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    20161228_210746.jpg 20161228_211447.jpg
     
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  14. bishoppeak

    bishoppeak Member

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  15. drklain

    drklain Member

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    If memory serves, the internals (including the dip switches) are different in the two models of HPWC. I don't believe the old ones had the ability to be set as "master" and slave for multiple HPWCs load-sharing the same circuit....
     
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  16. Ulmo

    Ulmo Active Member

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    That's the correct one for the current (newer) Wall Connector. I don't know why my MyTesla still has the old, outdated, incorrect manual for the newer Wall Connector; there are some different things in it. The new manual says use 2AWG copper or whatever local jurisdiction requires, and the older manual says 3AWG copper; that's a giveaway someone is using the incorrect manual.

    Since your MyTesla page has the new one and my MyTesla page has the old one, I suggest everyone confirm they have the correct manual before proceeding.

    I went with the new manual at 2AWG, and my electrician used THHN in 1" EMT conduit (if it were me I'd have used 2" EMT conduit or 1.5" EMT conduit, depending on budget -- the larger the conduit, the easier to pull wire, even though I'm really good at vacuuming rope with balls of hankerchief at the end, pushing steel fishers, pulling them, vacuuming through and roping through a lot of conduit wax, wiping the wax onto the wires, rigging up pully systems to pull and push wire at the same time --- I'd rather just have a larger pipe while doing all that thank you very much).
     
  17. drklain

    drklain Member

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    Both manuals appear on my mytesla page documents.....
     
  18. ev-now

    ev-now Member

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    I was just going to point this out. Many people who get a Tesla, end up getting another. Might be sensible to wire for 100A, as then you could have two vehicles on that circuit at a later date should the need arise. I did this for my NEMA 14-50 circuit, material cost was not that much in the grand scheme of the overall install.

    I paid an electrician to do it simply to ensure no insurance issues if ever there were an electrical fire (no permit and/or work completed by an unqualified person might be just the excuse they are looking for).
     
  19. John Stuckey

    John Stuckey Member

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    It is a good idea to consult the code book or other source for wire sizes/types/conduit sizes and distances of runs. Distance could make a difference!
     

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