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Locked NEMA 14-50 Outdoors?

Discussion in 'Model S: Battery & Charging' started by pbleic, Feb 11, 2014.

  1. pbleic

    pbleic Member

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    I am going to be putting an outdoor NEMA 14-50 in a location that is open and unsupervised. Does anyone have experience with locking up access of this type? Can someone post photos and specs of how to do this?
     
  2. mitch672

    mitch672 Active Member

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    The RV Park box I have is lockable, but it's rather large, since it has circuit breakers in it, and a 14-50, TT-30 and a 120V 20A GFCI outlet in it. There are holes on the lower left and right of the cover/body to insert a rod or locks.

    image.jpg
     
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  3. buzzbar

    buzzbar Member

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    Here's a link for a similar model, much smaller, and it is lockable:

    Eaton, 50 Amp 1-Space 1-Circuit Temporary RV Power Outlet Box, CHU1S at The Home Depot - Tablet

    By the way, I'm an electrical contractor with nearly 30 years experience in Washington state. Feel free to ask me any electrical questions.


    Good luck!

    Andy
     
  4. Princeton96

    Princeton96 Member

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    Are you looking to secure it when you're not using it or also when you're using it? I used to live in a townhouse complex with carports. I had a weatherproof box installed with a Nema 14-50 plug. When you're not using it, the box closes and you can attach a small padlock to keep it closed. When you're using it, it gets a bit trickier because the cover doesn't close all the way.

    Here's a link to my solution. It's at the bottom of page 1. It worked pretty well. I usually just kept the UMC plugged in all the time and locked to the box.

    Will the UMC fit when the cover is closed?
     
  5. pbleic

    pbleic Member

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    Actually, just looking to secure it when we aren't around. A lock is fine.
     
  6. iffatall

    iffatall Member

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    Is there some way to make sure someone cannot plug out the MC while charging?
    EDIT: Sorry just noticed Princeton96's solution.
     
  7. Lloyd

    Lloyd Active Member

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    #7 Lloyd, Feb 11, 2014
    Last edited: Feb 11, 2014
    Here is a much smaller installation, with a locking slot on the lower right I did at my house.

    IMG_0435.JPG IMG_0436.JPG

    Sorry they oriented sideways.
     
  8. Dane Jasper

    Dane Jasper Member

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    Here is the solution we put together at my office. It captures the mobile charging adaptor so it can't easily be stolen.

    AiqjrZx.jpg
    cMEkrHA.jpg

    2LbYrTh.jpg
     
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  9. Fezzik

    Fezzik P67429

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    I would maybe put a rubber grommet on the bottom of that box where the cable is coming out. But looks like a great idea for outside!
     
  10. Max*

    Max* Autopilot != Autonomous

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    Many outdoor NEMA boxes have locking options.

    20150827_183539.jpg

    (I don't have one where the cover is closed, but you see the metal loop protruding, that enters the slit in the cover, and you can place a lock over it)
     
  11. brucet999

    brucet999 Active Member

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    Here is an inexpensive version with locking lid, $30 at Home Depot. Surface mount with knockouts on both sides, bottom and back.

    GE 50-Amp Temporary RV Power Outlet-U054P - The Home Depot

    de15f409-70ad-4fb5-82f6-4e7f206fab3c_400.jpg
     
  12. Grease Monkey

    Grease Monkey New Member

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    You might be required to put an additional means of disconnect, like this within line of sight, since you are defeating the regular means of disconnect (the plug). The locks are supposed to remain open when in use if no other means of disconnect are within line of sight. The locks on boxes are mostly meant to protect people servicing the circuits. This prevents someone from being electrocuted because someone else energized the circuit. More info here.​
     
  13. brucet999

    brucet999 Active Member

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    No way a Tesla 14-50 adapter fits under that lid when it is locked.

    14-50 is not much different from a dryer plug, so unlikely to need a separate shutoff other than circuit breaker. I wouldn't/didn't even pull a permit for such a thing.
     
  14. Edmond

    Edmond Permanon

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  15. FlasherZ

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

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    Disconnect is only required for > 60A (625.42).
     
  16. FlasherZ

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

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    Most jurisdictions require a permit for anything short of a direct replacement of an existing device. Any new circuit or circuit extension generally requires a permit pull in those jurisdictions where separate electrical permits are required.
     

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