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Old 01-12-2015, 10:40 PM   #1
Join Date: Jan 2015
Location: Charleston
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Small electric heater fan tripping breakers

2010 Eagle 318RLS. Running a 30 amp plug in service. These are two holmes, digitally controlled thermostat, that got rave reviews on Amazon for this exact purpose.

It does it sporadically, which is what's confusing. Sometimes it will run all night no problems. Other times it will not. No, it's not because I am running other things also. The one for the bedroom is tied onto the same circuit as my big screen TV for the rear, so maybe the TV and that is too much. Still, I can't imagine a small plug in heater tripping a 15 amp breaker. When I run both of them at the same time, on two different outlets that are controlled by two different breakers, one time it tripped a local 15 amp, as well as the 30 amp main for the entire trailer.

If the heaters are just too much, fine. But as a contractor, that indicates to me inferior wiring, and that is my concern.

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Old 01-12-2015, 11:05 PM   #2
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I would try running one of them on a lower setting.

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Old 01-12-2015, 11:17 PM   #3
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No lower setting. Thermostat set at temp. No low speed.
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Old 01-13-2015, 04:22 AM   #4
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No, it is not inferior wiring.

If it is an 1800 watt heater (which is the maximum 120V unit that can be had) and your voltage is 120V then the current is 15 amps. I=P/E. So you can see that adding the TV load could easily trip the breaker. Two heaters and the converter load would trip the 30 amp main breaker too.

Even with a lower in voltage and the resulting current drop (this is not true for an air conditioner load) you are still operating right near the limits of the circuit.
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Old 01-13-2015, 06:24 AM   #5
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If you are tripping the main that says they draw more than 15amps or the CG is experiencing low voltage issues which would increase the current draw.
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Old 01-13-2015, 06:34 AM   #6
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Are you running the water heater on electric at the same time? That would also add to the total load when it cycles on. We try to only run one heating type appliance (heater, electric fry pan, toaster, hair curlers, etc.) at a time when on a 30 amp circuit. That seems to work with the water heater on electric.
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Old 01-13-2015, 08:11 AM   #7
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Better get an amp prob,check your draw ..
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Old 01-13-2015, 08:24 AM   #8
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Whenever we can we always like to run a drop cord into the trailer plugged in the campground 20AMP Service at their pedestal. Then we can plug things like the portable 120VAC heaters etc into that which does not effect the 30AMP service connection feeding the trailer.

You obviously have more 120VAC items running at the same time then you think.

The converter/charger draws alot of current when in boost charge mode- also the hot water heater may be on electric and cycling on and off...

There are several things in your trailer 30AMP configuration that could cause the main breaker to trip when alot of large wattage items are being used.

We have a large round type vacuum cleaner that draws a bunch of wattage. It will trip our circuit breaker if we are using that and kick on the Microwave etc...

30AMp Service is not a whole lot of juice... Just 15AMPS more than a regular house type 120VAC receptacle...

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Old 01-13-2015, 08:35 AM   #9
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It's the amperage that trips breakers, and any heating devise will draw a lot of amps. I have a small aftermarket electric heater/fireplace for my Eagle. Before my first trip, I read a few posts, here, and decided to run an extension cord out the corner of my slide-out and directly to the 20A outlet on the campsite post to operate my heater. At one campground, the post was too far away for my extension cord to reach. I plugged the heater into an inside receptacle, and switched my water heater over to gas to avoid popping a breaker. That worked fine until the next morning when I turned on the coffee maker . . . popped a breaker immediately! From my readings on The Forum, I knew exactly what the problem was - thanks again to everyone for their informative and helpful posts. I switched off the heater and turned on the furnace, reset the breaker, turned the coffee maker back on, and all was well. After enjoying a cup or two of Jo, I headed to the hardware store and purchased a second heavy-duty extension cord, then reconnected the heater to the CG electrical post.

When setting up at a new campsite, I extend the slide about 1/2 way out, which opens up a gap at the lower corner that's large enough to pass the female end of the extension cord through from the outside. Then I go back inside the trailer, pull in enough extension cord to reach the heater, and finish extending the slide. This method works great for me and I haven't tripped a breaker since! For those without a slide, you may be able to run your extension cord through a gap at the side of the bed, into your pass-thru storage, and out a hatch door.

Hope this helps you stay warm!
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Old 01-13-2015, 08:44 AM   #10
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Originally Posted by RoyBraddy View Post

30AMp Service is not a whole lot of juice... Just 15AMPS more than a regular house type 120VAC receptacle...

Roy Ken
Hardly anyone understands this and you have a family and sometimes more living in this one room.
I too run a 20 amp cord to the poll out the corner of my Hybrid just for my small space heater and dehumidifier.

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