TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker or making a Paypal contribution here: paypal.me/SupportTMC

Can you change NEMA 14-5 to Wall Connector?

Discussion in 'Model S: Battery & Charging' started by PtG62901, Aug 5, 2016.

  1. PtG62901

    PtG62901 Member

    Joined:
    Jul 29, 2016
    Messages:
    319
    Location:
    Carbondale, IL
    If you have a NEMA 14-5 sitting behind a 50 breaker, can you just drop in a Tesla Wall Connector easily?

    Thanks for any help.
     
  2. Brass Guy

    Brass Guy Member

    Joined:
    Jan 5, 2014
    Messages:
    505
    Location:
    Stoughton, MA
    I think the wiring is not difficult, as long as you have enough slack. Of course set the jumpers for a 50A circuit.
     
    • Like x 1
  3. PtG62901

    PtG62901 Member

    Joined:
    Jul 29, 2016
    Messages:
    319
    Location:
    Carbondale, IL
    Thank you. I have an electrician to do the work. Burning down the house is bad form. Lol.

    It seems like same wires, same breaker, just different at receptical.
     
  4. Brass Guy

    Brass Guy Member

    Joined:
    Jan 5, 2014
    Messages:
    505
    Location:
    Stoughton, MA
    The wall connector can accept different wire sizes, and larger than the highest standard outlet. So if you have an outlet already, you can just connect the wall connector in its place.
     
    • Helpful x 1
  5. PtG62901

    PtG62901 Member

    Joined:
    Jul 29, 2016
    Messages:
    319
    Location:
    Carbondale, IL
    Thank you, that was just what I wanted to know.
     
  6. anxman

    anxman Member

    Joined:
    Dec 21, 2014
    Messages:
    358
    Location:
    san francisco, ca
    To be clear, it doesn't plug directly into the NEMA 14-50. The HPWC accepts the same electrical lines, so the installation will be trivial for your electrician though.
     
    • Helpful x 1
  7. PtG62901

    PtG62901 Member

    Joined:
    Jul 29, 2016
    Messages:
    319
    Location:
    Carbondale, IL
    Thank you. Sounds like if the wire isn't cut very short in the box, it drops in. My plug is run in conduit, so if that slack isn't there, things could get dicey. That seem right?
     
  8. Brass Guy

    Brass Guy Member

    Joined:
    Jan 5, 2014
    Messages:
    505
    Location:
    Stoughton, MA
    It just means an electrician would have to splice the wires. There are connectors for #6 wire, but they're more expensive than wire nuts.
     
    • Like x 1
  9. ABCCBA

    ABCCBA Member

    Joined:
    Dec 20, 2015
    Messages:
    390
    Location:
    Somewhere
    #9 ABCCBA, Aug 6, 2016
    Last edited: Aug 6, 2016
    I am hoping it was a typo and you meant a 14-50 outlet. If so, it IS NOT the same wiring! A 14-50 is a four-wire outlet. Two 120VAC hot leads, a neutral and a ground.

    The Tesla HPWC is a three- wire device. Two 120VAC hot wires and a ground. There is no neutral. So, the neutral would need to be disconnected in the panel and taped on both ends.

    For a licensed electrician, it is an easy swap.
     
    • Informative x 2
    • Like x 1
  10. eladts

    eladts Member

    Joined:
    Jul 31, 2016
    Messages:
    7
    Location:
    Brookline, MA
    Another option is buying the Corded Mobile Connector and plugging it semi-permanently in the NEMA 14-50 socket. This way no installation is needed.
     
  11. PtG62901

    PtG62901 Member

    Joined:
    Jul 29, 2016
    Messages:
    319
    Location:
    Carbondale, IL
    Reading the descriptions, it seems like the Wall Connector would be superior. It is cheap enough to bring in the electrician for an hour. The 24' cord seems like a good idea too.

    Thank you finding a different option.
     
  12. mknox

    mknox Well-Known Member

    Joined:
    Aug 7, 2012
    Messages:
    8,570
    Location:
    Toronto, ON
    I went to Home Depot, bought a stove 14-50 cord set and wired it into my HPWC, setting the dip switches to 50 amps (40 amps delivered). I mounted the HPWC to the wall near the 14-50 outlet and plugged it in. Depending on where you live, this might fall into an electrical code grey area, but as far as I can tell, there is nothing prohibiting it.
     
  13. davewill

    davewill Member

    Joined:
    Feb 5, 2014
    Messages:
    437
    Location:
    San Diego, CA, US
    #13 davewill, Aug 8, 2016
    Last edited: Aug 8, 2016
    Yes you can certainly use a 14-50 pigtail. However, since the install instructions for the HPWC don't specify this as an option, some don't think it is kosher to do this. My Blink came with a 6-50 pigtail, and ClipperCreek sells their EVSEs with a variety of plugs on them, and I personally think it's fine. But if you want to hard wire it, it's almost as easy as installing a cord.

    You just get a cover plate for the outlet box that has a hole for conduit, remove the outlet, and use the box as a junction box. The conduit gets connected to your HPWC and the appropriate wire is connected to the wires used for the outlet, run through the conduit and terminated in the HPWC. Have an electrician do it if you are the slightest bit uncertain.
     
    • Informative x 1

Share This Page