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NEMA 5-20 to 6-15

Discussion in 'Model S: Battery & Charging' started by supratachophobia, Jun 2, 2016.

  1. supratachophobia

    supratachophobia Active Member

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    Similar to how the Tt-40 to 14-30 custom adapters work, could another adapter be made to go from 5-20 on the UMC to 6-15 on the recepticle?

    The reason I ask is because I have access to jobsite temporary electric with a 6-15 connector on a 20 amp breaker.

    If so, what would such a pin out look like.
     
  2. supratachophobia

    supratachophobia Active Member

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    Edit: That should read TT-30 to 14-30.
     
  3. davewill

    davewill Member

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    Yes, you can. Wire the ground pins together and the two blades on the 6-15 to the blades on the 5-20. Polarity on the blades doesn't matter with 240v charging, as it does when wiring the 120v TT-30 plug. Doubtless you realize that a 6-15 shouldn't really be on a 20a breaker, however I've also seen such liberties taken. Keep a very close eye on the temperature of the 6-15 receptacle. Probably nobody has tried to pull 16a continuous from it. As long as the wire is big enough, the receptacle can probably handle it, though. Use a 5-20 "T" receptacle so that you can switch to your 5-15 adapter if you need to.
     
  4. TexasEV

    TexasEV Well-Known Member

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    Why bother? Tesla makes a 6-15 connector for the UMC.
     
  5. MorrisonHiker

    MorrisonHiker S 90D 2018.24.1

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    Tesla does have a 6-15 adapter already. Might be faster to just stop by your friendly Service Center. ;-)
    I believe he's trying to charge at 16 amps instead of the 12 amps that the 6-15 connector would allow since there's a 20 amp breaker.
     
  6. supratachophobia

    supratachophobia Active Member

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    This is correct, I have the 6-15 adapter already (makes the collection complete). If possible, I'd like that extra 4 amps since that's another couple miles per hour of charge. I was concerned about the heat, so that is a good reminder from /u/davewill.
     
  7. robby

    robby Member

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    This will work... but for the love of anyone who comes after you, please label the 5-20 side of that adapter "240V! FOR TESLA CHARGING ONLY" so that no poor soul gets zapped by what is supposed to be a "neutral" pin.
     
    • Like x 2
  8. davewill

    davewill Member

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    Or starts a fire or destroys some expensive piece of equipment by plugging it into 240v when it wasn't supposed to be. Quite so.
     
    • Like x 2
  9. supratachophobia

    supratachophobia Active Member

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    Where is the fun in that? 240v @ 15amps won't shouldn't might not kill you....
     

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