TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker and becoming a Supporting Member. For more info: Support TMC

14-30 adapter not outputting correct voltage?

Discussion in 'Model S: Battery & Charging' started by silentsnow31802, Jan 19, 2017.

  1. silentsnow31802

    Joined:
    Feb 26, 2016
    Messages:
    265
    Location:
    Napa, Ca
    I have a 10-30 plug in my garage that I share with my dryer. I ordered cable to convert it from 10-30 to 14-30 so I can use my newly purchased 14-30 adapter to charge my car. It does not seem to work properly.

    I am getting 240V through the two hot sides but the neutral to hot I am only getting 8V. If I unplug the Tesla adapter I get the full 120V from each side. I have attached pictures of what I am on about. My 14-50 adapter I can get 120V on the UMC side of the adapter from each leg to neutral where on the 14-30 I am only getting 8V.

    Has anyone else used this configuration? 10-30 from wall to a 14-30 plug with the Tesla 14-30 adapter? It should work in theory right?

    I am wondering if my adapter has a problem.
     

    Attached Files:

  2. MP3Mike

    MP3Mike Well-Known Member

    Joined:
    Feb 1, 2016
    Messages:
    5,897
    Location:
    Oregon
    I don't think the adapter has a neutral, it uses hot-2-hot to get the 240v. (It has no need for 120v.)

    The other pin would likely be ground, is your 10-30 adapter providing a good ground?
     
  3. silentsnow31802

    Joined:
    Feb 26, 2016
    Messages:
    265
    Location:
    Napa, Ca
    Sorry my terminology might not be the best here. I do not think the adapter is providing a good ground.

    Out of the 3 wires I seem to have 2 separate 120V hot wires that together make 240V and what I assume is the ground. If I go from one 120V to the other 120V wire I do get the 240V that it is supposed to have. When I go from one 120V wire to the ground I get 8 to 9V.

    If I do the same test at the plug itself I can get 120V out of each power wire to ground.

    Hope that makes sense.
     
  4. silentsnow31802

    Joined:
    Feb 26, 2016
    Messages:
    265
    Location:
    Napa, Ca
    DERP I figured it out....

    I hooked the Ground/Neutral wire from the 14-30 side to the neutral on the 10-30 side instead of the ground. Swapped it and its working fine now.
     

Share This Page

  • About Us

    Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.
  • Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


    SUPPORT TMC