Factory shore power plug

Discussion in 'Peterbilt Forum' started by brianw900, Dec 8, 2014.

  1. brianw900

    brianw900 Bobtail Member

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    May 16, 2011
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    Has any bought a new 579 or 389 with the factory shore power and had the male end on the truck have one prong verticals and the horizontal. Just trying see if this is a mistake or if they are really like that, called a couple of dealers and haven't gotten a straight answer.
     
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  3. Scott101

    Scott101 Medium Load Member

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    Sounds like a 20 amp plug.

    Ideally you would only plug that into a 20 amp receptacle/extension cord. But there are adapters that would allow you to plug into a standard 15 amp receptacle/extension cord.
     
  4. Scott101

    Scott101 Medium Load Member

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    Here is the difference between a 20 and 15 amp receptacle:

    Does it look like it would plug into one of these?

    [​IMG]
     
  5. brianw900

    brianw900 Bobtail Member

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    May 16, 2011
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    Yes but the other issue that the horizontal prong would be on the opposite side on the truck, it truly is an oddball. Checked a few recreational places but the all have the adaptor sand cords designed for what your pic shows. Thanks for your input on this.
     
  6. Scott101

    Scott101 Medium Load Member

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    Oh, Is there a NEMA designation on the plug anywhere? Like 6-20P, or 250V-20?

    Does it look like any of these?:

    [​IMG]
     
  7. brianw900

    brianw900 Bobtail Member

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    May 16, 2011
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    6-20P is what it is. Thanks again for your help .
     
  8. Scott101

    Scott101 Medium Load Member

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    Nov 30, 2008
    NorCal
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    Cool. You're welcome.

    I don't know a whole lot about shore power setups. But that 240v circuits seems weird to me. --2 Hots, Ground, No Neutral!

    I'm curious how they are doing that. I would think a 30Amp 120volt circuit like they do on small RV's would make more sense. I've also seen big 50Amp 240volt RV circuits, but those are 4 wire. --They give you a neutral!

    Oh well, I'm sure those engineers know better then I do...
     
  9. DeGuzzie

    DeGuzzie Bobtail Member

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    Mar 30, 2015
    Benson, Vermont
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    I just want to say thanks to everyone who participated in this thread. I just recently had battery issues and the terminal I'm at has receptacles for trucks with 6-20P to a 6-20R.
     
    KB3MMX Thanks this.
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