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HPWC connected with a plug to a NEMA 14-50

Discussion in 'Model S: Battery & Charging' started by Ohm's Law, Jun 24, 2015.

  1. Ohm's Law

    Ohm's Law Member

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    Will a HPWC crimped with a plug to a NEMA 14-50 socket be safe? I am worried about heat, stability, breaker tripping, fire under 40 Amps

    This way the NEMA 14-50 can be used as a backup in case the HPWC fails; anyone know the warranty on the HPWC?
    HPWC to NEMA.jpg

    -OL
     
  2. Nevek

    Nevek Overt Member

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    I'm sure you will have your answer in a Flash(erZ).

    (That's a good thing, he's been to go-to guy for all things home power wise, check out his FAQs)

    FAQ: Home Tesla charging infrastructure QA
     
  3. FlasherZ

    FlasherZ Sig Model S + Sig Model X + Model 3 Resv

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    There's a question specifically about that in the FAQ. Bottom line is that it isn't necessarily unsafe when properly provisioned and installed with the correct clamps, strain relief, torque, etc.

    However, your installation is illegal. NEC 625 requires the unprotected (NEMA 14-50 side) portion of the power cable to be 12" or less.

    FWIW, Tesla's position is that the HPWC is intended for permanent wiring methods only. For now, inspectors will likely consider it legal (as long as cord is < 12") because there are no explicit instructions in the installation guide requiring permanent wiring methods, but Tesla has told me that they are likely to change that in the future. They are concerned that longer lengths of 14-50 cord will tear live conductors out of the side of the HPWC. To me, that's not so much of a risk as physical damage to the live cord from tools.

    HPWC warranty is 1 year unless purchased with the car, in which case it's covered under the car's warranty.
     
    • Informative x 1
  4. AmpedRealtor

    AmpedRealtor Well-Known Member

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    Being out of spec with the NEC does not make something illegal.
     
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  5. Emobile

    Emobile Member

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    This looks suspiciously like the one in my garage...

    20150601_165319_zps2wb1mhtw.jpg
     
  6. FlasherZ

    FlasherZ Sig Model S + Sig Model X + Model 3 Resv

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    #6 FlasherZ, Jun 25, 2015
    Last edited: Jun 25, 2015
    In most jurisdictions, it is, indeed, illegal.

    In fact, in some jurisdictions, it's more than a citable offense - it's a misdemeanor.

    In most jurisdictions, there is generally a law or ordinance that states all construction must comply with the NEC. Village 5 miles from me allows for citation to be issued for each day the NEC is violated, fine of up to $750 per day per offense. I've pointed out some cities in the US where it's considered a misdemeanor, punishable with jail time and fines.

    One example of local municipal code:
    Or, Olympia, WA:
     
  7. MorrisonHiker

    MorrisonHiker S 90D 2017.42

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    I thought it looked really familiar. I'll ask you then. Is there any reason you didn't rotate the 14-50 socket 180 degrees and just attach a short (12" or so) cable to the HPWC and mount it directly above the 14-50 socket?
     
  8. Emobile

    Emobile Member

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    Did I say it looks like mine? What I meant to say it looks like a guy I know who knows a guy who it looks like what he has...

    - - - Updated - - -

    The guy I know who knows a guy that has this in his garage already had the 14-50 socket there for his welder, and installed it with a 6' pigtail. Since he backs his S into the garage, the charger door is directly underneath the charger wand.
     
  9. AmpedRealtor

    AmpedRealtor Well-Known Member

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    I just know that I sell houses all the time where something or another is not "up to code", and it's never an issue and certainly doesn't rise to a criminal offense. People DIY stuff all the time, not that they should, but I've never heard of anyone being criminally liable for a bad DIY job. I simply find it difficult to believe that altering your house in a way that is "not up to code" is a criminal offense. Since when do we live in a police state?

    I am not in a position to dispute the citations you've provided, I am in shock.
     
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  10. jeffro01

    jeffro01 Active Member

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    I don't think it's so much about it being a criminal offense more than it is about liability and how your homeowners insurance may react to such things, etc, etc...

    While I don't doubt that some places may take this very seriously as a criminal issue, I would be more concerned about my liability.

    Jeff
     
  11. FlasherZ

    FlasherZ Sig Model S + Sig Model X + Model 3 Resv

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    That misdemeanor provision is pretty rare; but citations aren't rare at all. They're just like speeding tickets - citable infractions. Of course, enforcement is another matter.

    Even my county, which doesn't require permits or inspections for electrical work, has an ordinance mandating adherence to the NEC and spells out penalties for non-compliance in the form of citations. As to how they find out? Well, that's another matter. In nearly every jurisdiction in the US, whether at state, county, or municipal level, violating the NEC is unlawful.
     
  12. AmpedRealtor

    AmpedRealtor Well-Known Member

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    Very good information, thanks! :)
     
  13. smilepak

    smilepak Active Member

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    Anyone know if Home Depot or where to buy a 12" - 14" short AWE 6 cable with NEMA 14-50 plug on one end to use on the HPWC?
     
  14. Webeevdrivers

    Webeevdrivers Member

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    Can you not just have an electrical shop build you one?
     
  15. smilepak

    smilepak Active Member

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    Know of one online? Im not too familiar with one around where I live.
     
  16. Webeevdrivers

    Webeevdrivers Member

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    Nope but google should help. I've had stuff built, usually 75 bucks an hour plus parts plus tax.
     
  17. gavine

    gavine Petrol Head turned EV Enthusiast

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    • Informative x 1
  18. Brewcitpizza

    Brewcitpizza Member

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  19. smilepak

    smilepak Active Member

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  20. Webeevdrivers

    Webeevdrivers Member

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    So question for all you experts (because I sure as heck ain't). Can a TESLA HPWC rated at 48 amps be plugged into a 50 amp Nema receptacle. It seems to me it would kick the breakers which I thought were rated at max 50 and 80 percent of 50 constant. I have a 50 amp Nema in my garage that I have my 40 amp juice box plugged into. (We have a leaf and smart ed) Although a Tesla is probably a few years away for us will I be able to plug in a Tesla HPWC and use it without burning my Town house down? :)

    Inquiring minds want to know.

    Gracias de antemano. :)
     

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