Forum Discussion

gsf35099's avatar
gsf35099
Explorer
Jan 19, 2015

Can a converter cause AC problems

Hi Gang, was wondering if DC converter could go bad and cause shorts on the AC side? Pretty sure I have a converter go bad ( no DC power between positive & neutral) and caused my GFCI outlets to get hot & burn.

Thoughts?

15 Replies

  • Old-Biscuit wrote:
    Thought responses in your other post covered that.

    GFCIs have 120V AC power to them. GCFI problems come from 120V AC issues.

    Converter has a 120V AC feed to power it but that feed has it's own CB.

    SO NO..converter issue would not affect/cause GCFIs to 'fry'


    NOW if you have an Inverter that feeds GCFIs.......a malfunctioning Inverter could cause isses with GCFI as the Inverter supplies 120V AC


    Thanks, oldbiscuit. I haven't seen any responses & for the life of me could not find that thread. LOL. I will search again and see if I can find it. Even in my forums it was not coming up. :)
  • Sprig wrote:
    gsf35099 wrote:
    ...converter go bad ( no DC power between positive & neutral)...


    Proper terminology goes a long way in helping to understand the problem. A DC source is typically measured between positive and ground (or negative), not neutral.

    At the moment, since you didn't mention anything other then GCFI going out, I'd consider them two separate issues.

    Is the breaker for the 110 for the converter tripped?


    Not to be a smart a$$, but you are apparently not familiar with my type of DC conver (IOTA 30 amp). There are output lugs labeled "positive, neutral, & ground". Between positive & neutral the output is zero. Between positive & ground the output is 20.7v.
  • wa8yxm's avatar
    wa8yxm
    Explorer III
    You said "No DC power between positive and neutral"

    Neutral, is not a term we use on the 12 volt side of life, That term only applies to the 120 VAC side of life, and those two should not .. cross.

    If you meant no voltage between Positive and Negative,, THEN, it should not cause issues on the 120vac side, unless it is shorted, in which case it will trip the breaker.. Now,, this same breaker on some rigs, may also feed the GFCI, and if it is shorted (120 volt side) and is "Downline" of the GFCI, it can trip the GFCI.

    Finally, some converters will show no output in a bench test but work perfectly once they sense battery voltage.

    You really need to know how the RV is wired.

    OH, and things like the water heater, furnace, fridge and often air conditioners all need 12 volt for control reasons.

    If you have a compter that controls your energy use (Load Shedding Energry Manager) it too runs on 12 volts.
  • Thought responses in your other post covered that.

    GFCIs have 120V AC power to them. GCFI problems come from 120V AC issues.

    Converter has a 120V AC feed to power it but that feed has it's own CB.

    SO NO..converter issue would not affect/cause GCFIs to 'fry'


    NOW if you have an Inverter that feeds GCFIs.......a malfunctioning Inverter could cause isses with GCFI as the Inverter supplies 120V AC
  • gsf35099 wrote:
    ...converter go bad ( no DC power between positive & neutral)...


    Proper terminology goes a long way in helping to understand the problem. A DC source is typically measured between positive and ground (or negative), not neutral.

    At the moment, since you didn't mention anything other then GCFI going out, I'd consider them two separate issues.

    Is the breaker for the 110 for the converter tripped?