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NEMA 14-50 outlet Height, 18" or 48"?

Discussion in 'Model S: Battery & Charging' started by zerompg, Jan 9, 2013.

  1. zerompg

    zerompg Member

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    RN6482 should be here by the end of the month and I need to get the garage wired. Can't decide whether to have it installed at 18" or 48" from the floor. All other outlets are at 48". Sorry if this has been discussed earlier, I didnt find anything by searching
     
  2. ElSupreme

    ElSupreme Model S 03182

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    I would put it ~48" up the wall. Mine is about 38-40" up the wall. The UMC cord is setup such that it hangs straight down when plugged into a correctly installed 14-50 outlet. So you don't want it too close to the ground.

    I have a hose hook installed directly above and to the left of my plug so my cord will hang down then wrap over the hose hook normally.

    Not to mention if you have a flood the higher your wire the better.
     
  3. FlasherZ

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

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    I concur - you need room for the UMC to hang (if you choose not to provide some support for it) as well as allow for a reasonable bend radius for the emerging long portion of the UMC. Mine is mounted at 48" with a "hose reel" type hook below it to coil the cord upon.
     
  4. hvb

    hvb Member

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    Forgive my ignorance, but why is it important for the cord to hang? Is it not acceptable for the UMC to touch the ground?
     
  5. rbergquist

    rbergquist S946 - VIN 1017

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    I picked a height that was easiest to plug/unplug. At 18" you have to stoop down, at 48" it felt like lifting too much, so I found what felt comfortable. Cable hanger is above plug.
     
  6. ElSupreme

    ElSupreme Model S 03182

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    Having the cord touching the ground it fine. It will get dirty, and may get damaged more easily. But the cord is angled at the plug such that when plugged into the wall it will point straight downward. So you want so room below you plug so your cord doesn't end up getting bent sharply.
     
  7. dailydriver

    dailydriver Member

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    In case you may eventually go with the HPWC, I would surely go higher (48" is the highest recommended by Tesla). It provides more space to manage the slack for the 25' cable and keep it off the ground (keeps it cleaner and makes it easier to sweep your floor). Excerpted from the HPWC Installation Guide (page 8):

    When mounting, the High Power Wall Connector’s 25’ (7.6 m) cable should
    easily reach the charging port, located under the driver’s side tail light,
    without straining the connections at either end.
    1. Use the mounting template as a guide to mark the location on the wall
    for the two mounting screws.
    • Space the holes exactly 8-7/16” (214 mm) apart.
    • The height of the bracket should ensure that the charging
    connector is located at a maximum of 48” from floor level.* The
    minimum height is 18” (46 cm) if mounting indoors, and 24”
    (61 cm) if mounting outdoors.
     
  8. FlasherZ

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

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    Oh, it can, it's just that in my garage it would be more subject to damage if it did so. :)

    If I weren't getting an HPWC, I would likely create a holder that would function as a "wall mount" for the UMC's GFCI/contactor/interrupting device.

    - - - Updated - - -

    I will note that this is a provision in the US NEC for indoor installation (625.29(B)). It lists an exception for listed device instructions, but it appears that Tesla chose to follow the code guidelines in listing the HPWC. 625.29(B):

    Technically this applies to the UMC as well, unless the device instructions say otherwise (and I haven't seen those instructions). This would also technically make the "tool balancer" installations illegal unless it were kept at 4 ft, but it's not dangerous. I don't think you're going to have an inspector complaining that your hook for the Tesla type 2 connector is 5 feet off the floor unless you've pissed him off. Just keep it within reach.
     
  9. zerompg

    zerompg Member

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    Thx, looks like I'll go with the higher height. Also, without buying the HPWC it seems to make sense to leave the power cord in the garage. Anyone get and extra cord to use when away from the garage?
     
  10. Jkam

    Jkam Member

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    Does anyone know the rationale for having the plug at a maximum height of 48"?

    I had the electrician install it above my head, so it is around 7' off the ground. I didn't want to brush up against the outlet or plug when I walked past it since it is not recessed into the wall. So I put it over my head. Seems to work for me just fine.
     
  11. FlasherZ

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

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    The 14-50 plug is not the "coupling means" I referred to earlier - that's the Tesla end of the UMC or HPWC. There is no restriction on receptacle placement (except certain cases, like kitchen appliance outlets must be within 20" of a counter top). They simply have to be "accessible".

    The ADA (4.2.5/4.2.6) requires that convenience outlets be at max height of 48-54" above floor in commercial settings.
     
  12. hvb

    hvb Member

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    Isn't the UMC about 18 feet long? How would I manage to have the cord uncoiled (to prevent overheating) yet have it not touch the ground while charging?
     
  13. FlasherZ

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

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    The approx. three large loops you will make won't really cause heating problems. The looping problem happens when you coil 100+ feet of cable with tight loops.
     
  14. hvb

    hvb Member

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    Do you have any advice on how to mount the UMC? I would really appreciate any suggestions!
     
  15. FlasherZ

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

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    I have chip-board walls in my garage and machine shop, so I have no qualms about using 16 penny nails driven at angles to hold items in place. :)
     
  16. hvb

    hvb Member

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    Just nails? I was envisioning some kind of fancy contraption; it never occurred to me to use nails. How delightfully simple.
     
  17. kvietor

    kvietor Model S S280 VIN 168

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    Like this? Center of outlet is at 42"

    IMG_0449.JPG
     
  18. Sig698

    Sig698 Model S Sig Perf #698

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    That looks just like my hook setup!
     
  19. kvietor

    kvietor Model S S280 VIN 168

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    Home depot!:wink:
     
  20. Sig698

    Sig698 Model S Sig Perf #698

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    Bingo!
     

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