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UMC safety questions

Discussion in 'Model S: Battery & Charging' started by Stimyg, May 28, 2013.

  1. Stimyg

    Stimyg Member

    Joined:
    Feb 17, 2013
    Messages:
    80
    Location:
    New York
    My car is parked outdoors, and I charge at a 14-50 outlet I had installed, also outdoors. A few safety questions:

    1) Is it safe to leave the UMC plugged into the car in the rain? That seems like an obvious yes. But I want to double check.

    2) Is it safe to to leave the UMC plugged into the outlet, but the Tesla-end hanging on a hanger, unplugged, in the rain? Or just in general to leave it that way, rain or no?

    3) If the UMC is plugged into the outlet, with the Tesla-end not plugged in, how worried should I be if my 2-year old were somehow to get the Tesla-end and play with it? Is it impossible to get shocked from the Tesla-end?
     
  2. FlasherZ

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

    Joined:
    Jun 21, 2012
    Messages:
    7,019
    The coupling connection is protected fairly well against weather elements.

    The Tesla end can hang on a hanger without problem, because the UMC meets NEC 625's interlock requirements to energize only when the car is attached. If the NEMA 14-50 is outdoor it should be protected by a weather resistant cover.

    As mentioned, the NEC 625 requirement for interlock makes it safe. You should be more concerned if your 2-year-old were to play with the 14-50 and touch the exposed blades.
     
  3. Mike_Schlechter

    Mike_Schlechter Model S - P457

    Joined:
    May 21, 2010
    Messages:
    446
    Location:
    Weston, CT
    My four year old, who has successfully spidered the windshield on a car with his head (just stood up and boom), torn the door off of a fridge (climbed it to get to some leftover birthday cake) and also managed to pop out a window from a casing that doesn't allow popping out (luckily it was a ground level window over the porch - he wanted to "eat snow" that had recently fallen), is yet to damage the UMC or himself in nearly six months. If it passes the Eli test, it probably can handle a whole hell of a lot!

    For the record, he is an otherwise well behaved, sweet, wonderful kid. He just has a special ability to break things around the house. It is strange really... he even broke the Roombah, that was a collaboration with his cousin, so I don't hold him accountable for that.
     
  4. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

    Joined:
    Mar 8, 2012
    Messages:
    12,756
    Location:
    Texas
    When the UMC is inserted into the charge port, it's weather resistant. If you unplug it during rain the port blinks a bit if there was water on the UMC plug (the water drips into the port and confuses the system). Solutions: 1) Wipe off the UMC before unplugging so that it's fairly dry. 2) Cover the UMC plug and port to keep the rain off. I envision a cover that velcros around the UMC cable and has a flat part to protect the port from most of the rain.
     
  5. deonb

    deonb Active Member

    Joined:
    Mar 4, 2013
    Messages:
    3,020
    Location:
    Redmond, WA
    Don't do that. Rain will get in anyway, and you'll just end up creating a water pouch instead of a rain protector. That will cause rust after a while. (Anybody who has done outdoor Christmas lights in a rainy climate quickly learns this one the hard way...).

    If a plug is rated for outdoor use, just leave it uncovered - don't put it in a bag. It will still get wet, but that way at least it has a hope of drying again.
     

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