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07-11-2020, 05:33 AM
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#1
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2 Rivet Member
1993 34' Excella
Barry's Bay
, ON
Join Date: Nov 2018
Posts: 65
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Are 12v breakers really self-resetting?
I plugged a 300w inverter into one of our round 12v outlets thinking “I’ll never use the full 300watts (generating 25amps) that could trip the breaker!”
Well I lost track recently, charged too many things at once, and now the breaker has tripped and the one outlet in the living area is no longer working during our cross-Canada boondocking trip.
Anyone recognize this breaker box and know how to reset them? A few have little buttons on the ends which don’t seem to do anything.
I’ve also switched the 12v kill switch off and on a few times to no avail.
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07-11-2020, 05:33 AM
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#2
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2 Rivet Member
1993 34' Excella
Barry's Bay
, ON
Join Date: Nov 2018
Posts: 65
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Picture
And here’s the picture of the box. It’s on the front wall beneath the windows, behind what used to be a couch before our renovation.
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07-11-2020, 06:10 AM
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#3
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Rivet Master
2018 25' International
Slidell
, Louisiana
Join Date: Sep 2017
Posts: 3,725
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The self resetting thermal breakers do self reset, but they generally have to have all voltage removed including any back voltage. So get out the multimeter and determine which one is tripped by testing voltage on both sides of each breaker. Then use the kill switch and verify their is no voltage on the power bus or the breaker on either side. Next test for continuity across the affected breaker using the ohmmeter portion. With no voltage, no heat it should have reset. If it didn't mess with the button and test again. Still nothing? rap on it with a plastic or rubber tool. Still nothing? You will have to replace it.
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07-11-2020, 06:13 AM
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#4
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Site Team
2007 30' Classic S/O
Somewhere
, South Carolina
Join Date: Apr 2010
Posts: 6,436
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LiamG,
Do you own a multi meter or simple 12V test light probe?
Test light is a very basic testing tool and could easily check for 12VDC power coming in and either going thru a circuit, fuse or 12VDC circuit breaker.
Multimeter does more but costs more.
Gary
__________________
S/OS #001 2005 Dodge Ram 2500 5.9L 6 Speed
16" Michelins, Hi Spec Wheels, Max Brake, Dexter 4 Piston Disc Brakes, Carslile Actuator, Equal-I-Zer, Dill TPMS. Campfire cook. BMV-712. DEMCO 21K Lb Cast Iron coupler
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07-11-2020, 06:24 AM
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#5
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Rivet Master
2007 30' Classic
Oswego
, Illinois
Join Date: Jul 2010
Posts: 13,669
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I dont believe they are self resetting. Reach your finger back on the ends of the breaker shell. You'll find a little black botton. Push to reset.
__________________
-Rich-
"If the women don't find you handsome, they should at least find you handy." - Red Green
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07-11-2020, 06:31 AM
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#6
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Site Team
2007 30' Classic S/O
Somewhere
, South Carolina
Join Date: Apr 2010
Posts: 6,436
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Just an FYI about self resetting 12VDC breakers.
Cutaways and a SPARK!
__________________
S/OS #001 2005 Dodge Ram 2500 5.9L 6 Speed
16" Michelins, Hi Spec Wheels, Max Brake, Dexter 4 Piston Disc Brakes, Carslile Actuator, Equal-I-Zer, Dill TPMS. Campfire cook. BMV-712. DEMCO 21K Lb Cast Iron coupler
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07-11-2020, 08:36 AM
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#7
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Rivet Master
2000 25' Safari
Davidson County
, NC Highlands County, FL
Join Date: Aug 2006
Posts: 4,493
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Quote:
Originally Posted by LiamG
And here’s the picture of the box. It’s on the front wall beneath the windows, behind what used to be a couch before our renovation.
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If original, those are manually "resettable" breakers. Unless they have been change, there should be black reset button on the end of each breaker inside the panel shown in your photo. Read the third paragraph of section G in your owners manual.
There are larger amperage "auto reset" breakers too, but they are not inside that panel. They are mounted on the wall near the battery box beneath the sofa. This is shown also in section G, noted on the schematic electrical drawing.
These breakers do go bad. I've had to replace a few in my 1999. I now carry spares.
__________________
Alan
2014 Silverado LTZ 1500 Crew Cab 5.3L maximum trailering package
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07-11-2020, 11:10 AM
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#8
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3 Rivet Member
2019 Nest
Louisa
, Virginia
Join Date: Jun 2020
Posts: 103
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Circuit breakers
Quote:
Originally Posted by LiamG
I plugged a 300w inverter into one of our round 12v outlets thinking “I’ll never use the full 300watts (generating 25amps) that could trip the breaker!”
Well I lost track recently, charged too many things at once, and now the breaker has tripped and the one outlet in the living area is no longer working during our cross-Canada boondocking trip.
Anyone recognize this breaker box and know how to reset them? A few have little buttons on the ends which don’t seem to do anything.
I’ve also switched the 12v kill switch off and on a few times to no avail.
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There are 2 types of circuit breakers. type 1 that auto reset and type 2 that trip and will not reset unless you completely remove power from it. Try disconnecting the battery (main ground will do it) without the shore line connected and the reconnect. That will reset a type 2 breaker. My Nest has this type.
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07-11-2020, 03:30 PM
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#9
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:SPACE A" S/O 11 Air19745
2006 34' Classic S/O
Fort Worth
, Texas
Join Date: Feb 2007
Posts: 1,766
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No body has mentioned it, but self resetting circuit breakers are a fire hazard. Under certain short conditions, other than a direct short, the heat build up due to low grade short caused resistance can be dramatic. I had scorching and smoke coming from the TV engine compartment and the TT circuit breaker panel on an SOB. A quick thinking wrecker driver grabbed his cable cutters and cut all positive battery cables (4). Like they say, "Where there is smoke there is fire."
guskmg
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07-11-2020, 04:28 PM
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#10
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2 Rivet Member
1993 34' Excella
Barry's Bay
, ON
Join Date: Nov 2018
Posts: 65
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Thanks
Thanks for the help. I do have a test light from the previous owner (didn’t know what it was for until now) and every breaker lights up...
So I’m thinking the issue must be with the plug itself or perhaps somewhere in between. In the case of the latter, I’m in trouble, so I’ll see about replacing the plug and hope for the best for now.
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07-11-2020, 04:36 PM
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#11
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Rivet Master
2002 30' Classic S/O
Fleming Island
, Florida
Join Date: Nov 2013
Posts: 4,673
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Your round plug probably has a fuse in it. Most i have used do. Unscrew the tip and I'm betting a spring and a fuse will fall out.
__________________
“You cannot reason someone out of a position they have not been reasoned into"
Al, K5TAN and Missy, N4RGO WBCCI 1322
2002 Classic 30 Slideout -S/OS #004
2013 Dodge 2500 Laramie 4x4 Megacab Cummins
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07-11-2020, 04:59 PM
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#12
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2 Rivet Member
1993 34' Excella
Barry's Bay
, ON
Join Date: Nov 2018
Posts: 65
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There is no fuse in the round plug. When pulling it out from the wall, the test light probe would light up.
After a bit of poking around, there was a spark when I went to plug the inverter in again and now there’s no power behind the plug. All the breakers are still lighting up, however.
Looks like I’ll be running an extension cord from the bedroom until I can get a pro to look at it.
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07-11-2020, 05:57 PM
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#13
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Site Team
2007 30' Classic S/O
Somewhere
, South Carolina
Join Date: Apr 2010
Posts: 6,436
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LiamG,
Well, might not be the result you wanted but you’ve now shook hands with the test light. That’s a good thing. I carry one too. Remember it’s for 12VDC systems not AC.
Gary
__________________
S/OS #001 2005 Dodge Ram 2500 5.9L 6 Speed
16" Michelins, Hi Spec Wheels, Max Brake, Dexter 4 Piston Disc Brakes, Carslile Actuator, Equal-I-Zer, Dill TPMS. Campfire cook. BMV-712. DEMCO 21K Lb Cast Iron coupler
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07-12-2020, 07:43 AM
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#14
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3 Rivet Member
2019 Nest
Louisa
, Virginia
Join Date: Jun 2020
Posts: 103
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Circuit breakers
Quote:
Originally Posted by LiamG
I plugged a 300w inverter into one of our round 12v outlets thinking “I’ll never use the full 300watts (generating 25amps) that could trip the breaker!”
Well I lost track recently, charged too many things at once, and now the breaker has tripped and the one outlet in the living area is no longer working during our cross-Canada boondocking trip.
Anyone recognize this breaker box and know how to reset them? A few have little buttons on the ends which don’t seem to do anything.
I’ve also switched the 12v kill switch off and on a few times to no avail.
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I think I misunderstood your outage problem. you are only having a problem with only 1 outlet if I understand correctly. Usually that would have a auto type fuse on your converter panel. Just a thought.
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