110 volt 400w outlet

Discussion in 'Mobile Audio/Video & Electronics' started by Stephen Swap, Jun 26, 2018.

  1. Stephen Swap

    Stephen Swap SDD Junior Member

    Messages:
    11
    Likes Received:
    3
    Joined:
    Oct 1, 2017
    Location:
    Gold Canyon, AZ
    I own a 2017 F250 equipped with the auxiliary 110 v 400w in cab power outlet When my wife plugs her heating pad into this outlet (pad draws 150watts max) it works but the pads hand control gets very hot and the view screen on it goes black. It works fine on normal house power. Is this issue related to the sine wave differences on inverter generated power or something else?
     
    Last edited: Jun 26, 2018
  2. 01yellerCobra

    01yellerCobra Full Access Member

    Messages:
    310
    Likes Received:
    64
    Joined:
    Jul 18, 2015
    Location:
    San Diego
    What's the current limit on the plug in the truck and how much current does the pad need?
     
  3. Stephen Swap

    Stephen Swap SDD Junior Member

    Messages:
    11
    Likes Received:
    3
    Joined:
    Oct 1, 2017
    Location:
    Gold Canyon, AZ
    As stated truck outlet is 400watts @ 110 volts AC and pad draws 150watts max when set on high.
     
  4. 01yellerCobra

    01yellerCobra Full Access Member

    Messages:
    310
    Likes Received:
    64
    Joined:
    Jul 18, 2015
    Location:
    San Diego
    That's wattage. Current is in amperage. My guess is the current rating for the plug in the truck isn't quite enough.
     
  5. Stephen Swap

    Stephen Swap SDD Junior Member

    Messages:
    11
    Likes Received:
    3
    Joined:
    Oct 1, 2017
    Location:
    Gold Canyon, AZ
    Using Ohm's law the truck supplies 3.63 amps. 400w/110v =3.6363A
    The pad on maximum setting is 150w/120V=1.25A. The supplied power is not the issue. I believe that I've gotten the answer. Some of my RV friends have inverters in their motor homes and they have noticed that none of their AC appliance's run the same when on inverted power but work fine on shore supplied power. It's the artificially created square sine wave that an inverter produces versus the nice pure wave that our power companies provide. I was told that the inverted wave is simulated by switching the power from plus to minus thus creating the square wave pattern. Sounds like a good answer to me. Thank you for your input
     

Share This Page