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The 15 amp breaker keeps tripping on our 320 cs-s 2018, under the bench passenger side

LawyerboyLawyerboy Member Posts: 116
in Battery/Electrical & Solar
Nothing unusual with the Tab plugged into the 30 amp service we installed years ago at the house.  Noticed when I checked on it yesterday, no power to lights etc.  Found nothing unusual outside, and when I checked the panel under the bench, noticed the 15 amp breaker right side of the 30amp it was tripped.  Reset it and today, same situation, where it tripped.  Any help would be appreciated.  TY
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  • pthomas745pthomas745 Administrator, Moderator Posts: 4,350
    The Fuses For Newbies thread linked below shows the 15 amp breaker is assigned to the GFCI circuits in the trailer.
    How that might affect the lighting in the trailer is not clear to me, though.
    You might want to check your GFCI outlet.

    2017 Outback
    Towed by 2014 Touareg TDi
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  • Sharon_is_SAMSharon_is_SAM Administrator Posts: 10,046
    What else is on that circuit?  I think that GFCIs can wear out.  I know you’re supposed to test them at intervals.
    Sharon / 2017 T@B CSS / 2015 Toyota Sienna Minivan / Westlake, Ohio
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  • BaylissBayliss Member Posts: 1,482
    @Lawyerboy, I currently have a Progressive Dynamics power center in my 2019 T@B 320 S Boondock Lite.  However, when I had the WFCO power center, the 15A circuit breaker (Branch #1) located to the immediate right of the 30A breaker, I determined that it protects the converter, interior GFCI, kitchen outlet, and the interior lights (and probably the exterior porch light, but I can't recall for sure).  Since you have a CS-S, what that breaker controls may be slightly different, but I would expect that it protects the same electrical components, although those components and GFCI outlet(s) may be situated in different locations in your trailer.

    Therefore, if the 15A breaker trips, the converter will not be providing (converting AC) power to the DC components, which include the lights.  I'm thinking there is a problem with the 15A breaker itself, but definitely rule out the GFCI outlet(s) first.

    Are you getting power to any electrical items, or are ALL electrical components not receiving power?  Also, is your 12V DC battery connected and the battery disconnect switch turned "ON" (that is, allowing power to flow from the battery, regardless of whether the converter is working or not?)  If so, the DC components should still have 12V power.

    Also, when you have your 30A cord supplying 120V AC power to the trailer (and converter), and you reset the 15A breaker, do any interior lights come on briefly (even just for a quick second)?  If the lights flicker on, then off, then the issue should not be with the GFCI, because power would be getting past it, albeit only momentarily.  If you are confident that at least one light switch is in the "ON" position, and nothing happens when you reset the breaker (other than the breaker again tripping), I would be leaning toward the 15A breaker needing to be replaced (or, possibly, there is a problem with the converter itself, in which case it might be worth contacting WFCO to see what they suggest.)  You may also want to check the WFCO website for troubleshooting suggestions.

    NOTE:  I have TWO GFCI outlets (one inside and one outside).  If the same is true for your CS-S, then be sure to check both to see if either of them has been tripped.
    2019 T@B 320 S Boondock Lite; 2025 Toyota Tundra CrewMax 4x4
    (Alde: 3020; Refrig: Isotherm Cruise 65 Eleg; Battery: BB 100Ah LiFePO4; Solar: Renogy 220W Portable Suitcase w/ Victron SmartSolar MPPT 75/15 Controller; Victron BMV-712 Battery Monitor w/ Shunt; Pwr Cntr: PD-4135KW2B; EMS: PI-HW30C)
    Greg & Marlene (Tucson, AZ)


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