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Dogbone adaptors that work?

Discussion in 'Charging Standards and Infrastructure' started by frequencydip, Jan 26, 2012.

  1. frequencydip

    frequencydip Sig 100 - #52

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  2. TEG

    TEG TMC Moderator

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    Lets see if someone else responds, but I think that may NOT work. I think that will provide "one leg" on the NEMA14-50 so 120V between one hot and neutral, and the other hot left floating, so no 240V for the UMC.

    You can get little "dongle adapters" that convert TT-30 to NEMA5-15 like this:
    nema-tt-30sm.jpg

    Then you might be able to use Roadster VDS to boost the amp draw a bit, but it will still be only 120V.

    Best to look for a real (240V available) NEMA14-50 at campsites, hotels, and RV parks...
     
  3. frequencydip

    frequencydip Sig 100 - #52

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    Thanks TEG. Does anyone know how to take advantage of TT-30 RV style connectors and make use of the full 30amps? I have the old style 240v charger that doesn't support multiple connectors, not the newer UMC.
     
  4. TEG

    TEG TMC Moderator

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  5. dhrivnak

    dhrivnak Active Member

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    Correct I do not think you will get this to work as the 30R is 120V and the Nema 14-50 is 240V. I was trying to charge at campgounds at a higher rate than 15 amps and was not sucessful unless they had a properly wired NEMA 14-50.
     
  6. richkae

    richkae VIN587

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    The MC240 is hardcoded to generate a 30amp pilot signal.
    If you follow the instructions in the other thread and make an adapter from the TT-30 plug to a plug your MC240 supports (nema 14-50 socket ) and then plug your MC240 into it, you must be very careful to limit the current draw to 24amps on your VDS.
    If you do that, then you should be able charge at 120volts and 24amps.
    Because of the fixed charging overhead, you get more than double the charge rate when you charge at 24amps versus 12amps.
    Since its about $15 in parts from Home Depot, I think its well worth it.
     

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