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Old 09-21-2014, 08:23 AM   #1
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1971 31' Excella 500
Many , Louisiana
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What would Make the breakers heat up they are really hot to point of tripping when ac

Not an electrician.

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Old 09-21-2014, 09:11 AM   #2
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Too much load on them. What are you running on 110 volt ac when this happens?

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Old 09-21-2014, 09:12 AM   #3
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Bad connections (loose wire at the breakers), old breakers (they do wear out or get internal issues with time), low voltage to the system (but not a common problem causing overheating).

I would start by simply replacing the breakers in question. They are under $5 each.
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Old 09-21-2014, 10:18 AM   #4
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Thanks id
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Old 09-21-2014, 10:28 AM   #5
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Clean all connections back to the plug. Low voltage will cause it to heat as it will try to pull load needed. Use ir thermometer on all connections to see if all or just one is causing problem. Don't forget to do the plug too, not a bad idea to keep track of voltage with a simple plug in meter found at CW.
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Old 09-21-2014, 12:11 PM   #6
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All circuit breakers and fuses trip/blow when they get too hot. That's the way they're designed to work--as a "weak point" in the circuit that protects the wiring in the rest of the circuit. Too much current is why they get hot.

So, what's pulling too much current? Possible culprits include, but are not limited to:
1. Low voltage--what kind of supply is your trailer plugged into? Running an air conditioner needs an honest 30 amps of 120 volt power. Sometimes the campground has skimped on their wiring, and the voltage drops when everyone turns on their AC.

2. Shorted circuit--is one of the wires rubbing something so the insulation is bad and the conductor is touching metal?

3. Dirty, corroded, or loose connections--increases resistance in the circuit and that pulls more current.

4. Bad component--is the air conditioner itself going bad?

5. Old, tired circuit breaker--these things get a little weaker with age and also with each time they trip.

For some reason, my personal troubleshooting philosophy is to start with the cheapest alternative first. Of course, do only what you can do safely and hire an expert for the rest.
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Old 09-21-2014, 12:31 PM   #7
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Thanks guys all helpful information for the novice AS owner!


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Old 09-25-2014, 02:27 PM   #8
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The first year of use of my preowned 2008 Classic 25fb kept tripping the 30amp fuse when the AC and the electric hot water ran together after getting set up at a campsite. I was told not to use the electric hot water heater.

I finally decided to replace the 30/20 breaker yesterday with a Progressive 30/20 breaker. When I took the old one out I noticed the connection point where the lug slides into was a different design than the new Progressive breaker. The new breaker had spring loaded clamps. It was hard to get the new breaker onto the lug so I'm hoping this new breaker will perform better due to this different connection design. I think I'll replace the remaining 2 20/20 breakers with Progressive unit.

I also moved the AC 20 amp circuit that shares the 30/20 breaker to another breaker so there isn't extra heat of the AC sharing the same breaker as the incoming 30 amp side. I did that last year and it helped to keep the 30 amp breaker from tripping so easily.


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