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Old 04-15-2012, 11:14 AM   #1
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wattage limitations

I thought I would purchase an electric heater to supplement my TT's heater and bought a 1000 to 1500 watt electric heater. Everything seemed just fine until I went to unplug from shore power and discovered that the 30 amp adapter had melted together with TT's power cord. It wasn't much as I was able to pull them apart, but still it was getting really hot. I have since purchased a 1850 watt 30 amp adapter and I am no longer using the electric heater. My recommendation, be careful of your wattage usage.
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Old 04-15-2012, 09:34 PM   #2
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Good chance you had low voltage or a bad pedestal. I had a very similar thing happen to me when I was in an old pedestal What you were doing should have worked just fine, but if there was a bad connection it wold have created enough heat to melt it....
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Old 04-15-2012, 10:36 PM   #3
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Good chance you had low voltage or a bad pedestal. I had a very similar thing happen to me when I was in an old pedestal What you were doing should have worked just fine, but if there was a bad connection it wold have created enough heat to melt it....

I agree completely, On our old trailer we had a 30 amp cord and used two heaters to keep it warm. No melting or overheating.
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Old 04-15-2012, 10:45 PM   #4
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I'm confused.

Why are you using an adapter?

Do you have 50 amp service on the trailer and used an adapter to connect to the 30 amp on the pedestal?

Or do you gave 30 amp service and used a 20 amp adapter to the pedestal?
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Old 04-16-2012, 01:43 AM   #5
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Sounds to me, the OP was not plugged into a 30A service, but rather into a 15A service.
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Old 04-16-2012, 06:24 AM   #6
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Sounds to me, the OP was not plugged into a 30A service, but rather into a 15A service.
That would make sense of why it got so hot. Must have been a 20a because it might have tripped a 15a.
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Old 04-17-2012, 07:05 AM   #7
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Thanks for the reply

It was a 30a adapter and I suspect that it was bad. I bought the trailer used and the adapter came with it. Some of the insulation on it looked kinda funny. It seemed to work just fine until I bought the heater. The trailer itself is 30a as well.
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Old 04-17-2012, 07:42 AM   #8
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The adapter typically used has a 30A socket on one end, and a 15A plug on the other end. You cannot draw more than 15A thru the adapter, or it will burn up.
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Old 04-18-2012, 06:59 AM   #9
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Guys, also remember that any small amount of resistance can be bad, those power pedistals in the campgrounds even though they are covered are exposed to outside conditions and the contacts in the plugs start to grow a layer of corrosion which leads to resistance which turns into heat. Pulling higher amp draws just adds to the heat. It's just one of those things that you just need to watch and be aware of.
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Old 04-18-2012, 07:55 AM   #10
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Guys, also remember that any small amount of resistance can be bad, those power pedistals in the campgrounds even though they are covered are exposed to outside conditions and the contacts in the plugs start to grow a layer of corrosion which leads to resistance which turns into heat. Pulling higher amp draws just adds to the heat. It's just one of those things that you just need to watch and be aware of.
Absolutely!
The current squared times the resistance is the power dissipated.
All electrical circuits have some degree of resistance. The conditions you describe will add considerably to the total resistance.
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