Forum Discussion

Family-of-five's avatar
Jul 12, 2020

moving up to 50 amp from 30

Hello all. Im trading in my 30 amp rig for a bigger rig with dual ac units and 50 amp.I used to run an extension cord from the garage and with the use of an adaptor,plug in for the frige and keep battery charged.My new unit does not use propane for the frige but runs off battery instead.I would like to run the extension cord like I used to to keep the battery charged.Is it ok to run 110 to the 50 amp power cord?

13 Replies

  • For what the OP is asking, it would be okay using at least a 12 ga cord that is not super long. I agree with jdc1, and would add, all items mentioned including AC, would be a hefty load, even for a 30A dedicated circuit, but do able, if not a really long run.

    Jerry
  • jdc1's avatar
    jdc1
    Explorer II
    Wanderingaimlessly
    I'm glad you edited your reply. Had family-of-five used that extension cord and 20amp adapter set-up to run a converter/charger, inverter, fridge and AC....something would give (burn up). Usually the AC first.
    Family-of-five should have a 30A or 50A outlet/breaker install closer to the RV.I did my 30A for under $200.
  • Yes, so long as you are only charging batteries and maybe one AC unit depending on the cord and the outlet (20 amp) that you are plugging into.
    If your fridge is using AC power from an inverter, it MAY/PROBABLY/USUALLY has an automatic function that switches from inverter usage to run directly from the AC shore power, it that is the case, you likely will not be able to run the air conditioners with the reefer running also from the 20 amp circuit.