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Burned 220V Adapter

Discussion in 'Model S: Battery & Charging' started by Lenn, Jul 30, 2013.

  1. Lenn

    Lenn Member

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    Location:
    Woodland Hills, CA
    Has anyone else had a 220v Adapter burn or melt? I plug in to the same 220v outlet every day at work. About 2 weeks ago, I noticed a "Charge Cable Fault" on my dash. When I unplugged, the adapter was very hot and I found this:

    220v Adapter 1st.jpg

    The rear of the adapter was scorched.

    A Tesla Ranger came out the next day and replaced my cable and 220v adapter. I used the same outlet at work (The only 220v on our lot), and one week later, the front prongs were scorched and the rubber melted on the FRONT of the adapter.

    220v Adapter 2nd.jpg

    Our on-lot electricians are checking the outlet as we speak, but I'm wondering if anyone else has had this issue?

    Thanks,

    -Lenn
     
  2. Todd Burch

    Todd Burch Electron Pilot

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    Interesting how it all seems to be confined to one prong. It looks like a poor connection on that prong to the outlet may be causing arcing. (Just a guess).
     
  3. mknox

    mknox Well-Known Member

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    That is almost certainly what's going on. A lot of current flows through these connectors and a tight fit is imperative. Even without arcing,a weak connection can generate a lot of heat.
     
  4. GJMcManus

    GJMcManus Member

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    I would agree...

    When electricity jumps across a gap between two conductors and creates a spark, the phenomenon is called arcing. As the electricity ionizes the air to produce the spark, it produces heat at the same time. Arcing near an electric outlet can create enough heat to melt the plastic. It can be caused by a loose connection on one of the hot terminal screws, by a poor connection inside the outlet or by a loose clamp that doesn't hold the plug securely enough. Outlet clamps wear out, given enough time, or they can be loosened when plugs are pulled out often and carelessly.
     
  5. FlasherZ

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

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    This type of melting shows the difference between intermittent loads and continuous loads. This is why you have to be so careful to have things installed properly.
     
  6. GJMcManus

    GJMcManus Member

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    As more arcing occurs, more amps, more heat and melting. Amps continue to increase until it gets to the point the gap is too wide for arcing to occur or the breaker trips.. That is why it is important to size the wires correctly.. If the wires feeding the receptacle were undersized the wires would have heated up. In the best case create a dead short tripping the breaker, worse case catch fire..
     
  7. Lloyd

    Lloyd Active Member

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    IMO this is not the fault of the Tesla connector, this is the fault of a worn plug where the blade from the tesla plug does not make proper contact!
     
  8. JPP

    JPP Active Member

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    FWIW, I own 2 of the NEMA 14-50 adapters, and leave one in the wall in my outlet, and 1 in my black UMC bag. I do not want to insert & remove the connector/adapter too many times, as I'm not sure what the rating/life of the receptacle is, but do not want to risk having a meltdown like others have had (..this is not the first posting on what looks like an issue with the receptacle rather than the adapter/UMC).
     
  9. rdrcrmatt

    rdrcrmatt Member

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    What voltage / amperage were you seeing when plugged in there?
     
  10. montgom626

    montgom626 Active Member

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    Simple solution, replace the receptacle plug. (female part). That part is cheap and easy to replace. Of course, have it done by someone who is qualified.
     
  11. Lenn

    Lenn Member

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    208V 30A
     
  12. joer00

    joer00 Member

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    Same problem :( Mine worked at about 238 volt and 40 amps. Plug was brand new and happened only after about 5 charges ! It was very hard to get the plug in and out, so I think nothing was loose.

    BurnedNEma1450.jpg
     
  13. FlasherZ

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

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    In your case, i see the box is melted behind the receptacle. I suspect you had a more of a loose wire behind the receptacle, not a prong issue (if the box wasn't melted already). You won't know until you pull it and look at it, but I'd suspect that first in your case.
     
  14. cinergi

    cinergi Active Member

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    Despite the # of melting incidents here, it's actually reassuring to see they're only melting and not going up in flames. Doesn't mean be careless but it's nice to see these things withstand the heat.
     

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