T@B 400 Inverter Outlet ?

On a T@B 400, factory installed inverter outlet, while testing the outlets in my new 400, I found that the inverter outlet is indicating an "open ground" per the plug in tester I have. All of the other outlets are OK.

Wondering if the inverter outlet is intentionally connected this way or this is an issue that needed to be corrected by NuCamp/Dealer?

Utah Driven

2018 T@B 400

MB GLK 250 Diesel

Comments

  • Michigan_MikeMichigan_Mike Posts: 2,174Administrator
    edited December 2017
    I'm guessing that the inverter is wired directly to the battery and you basically have a floating ground as it's not connected to an earth ground.   If the trailer is plugged into shore power the existing 120V outlets should test out okay with your tester, but the inverter will show an open ground which I am told is normal.  The plug-in tester is normally used for an AC circuit and I don't believe it will provide accurate read for the inverter.  

    Have you tried plugging an item into the inverter using the inverter powered from the battery?   I'll bet everything is fine.  
    Mike Smith 
    Linden, Mi
    2015 T@B Max S
    Attached Image
  • LSkrabutLSkrabut Posts: 80Member
    edited December 2017
    Just tried testing without shore power (Yes I turned off Alde 1st, all other devices(Fridge, Jensen's are turn off or unplugged).

    No difference in the indicated "Open Ground" from Battery/Solar charging or shore power.

    I was also guessing a floating ground, just not sure if that is a correct "assumption" on my part or not.

    Utah Driven

    2018 T@B 400

    MB GLK 250 Diesel

  • Michigan_MikeMichigan_Mike Posts: 2,174Administrator
    But your inverter is working, correct???

    Plug in a 110V item like a light or something comparable and verify that the inverter actually works.  And do a search on Google too and you will see that this is common and that the inverter is fine.  
    Mike Smith 
    Linden, Mi
    2015 T@B Max S
    Attached Image
  • LSkrabutLSkrabut Posts: 80Member
    After digging in from some of the internet articles.

    There should be only 1 neutral/ground bonding. Since there is an inverter and shore power, only 1 should have that bond when active.

    Tomorrow I will check the ground path from the shore power plugs to trailer ground vs battery ground to the inverter plug, then check battery ground to trailer ground, which as I gather should be an open other than for trailer-TV lights, turn/stop and brake.

    But that brings up the thought trailer ground should be 12VDC ground also. Since the inverter/solar/shore power can be active at the same time in a parked-shore power situation, but battery should be separate from shore power bond. Hmmm, wondering now if that is why some have notice blown fuses?


    Utah Driven

    2018 T@B 400

    MB GLK 250 Diesel

Sign In or Register to comment.