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Old 07-24-2011, 03:04 PM   #15
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We bought a new 16' TT in 2005 with a no-name a/c unit on it. Wanted to buy a generator to run it so did a draw test on it. Took 27.5 amps to start it and 18 amps to run it. Would not start on a household 15 amp. circuit. I installed a 30a RV box in my garage.

Our old '88 Itasca we have now draws much less with the Coleman a/c unit. It will start and run on a 15 amp circuit. I did do a draw test on it but don't remember the figures, but were lower than the TT.
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Old 07-24-2011, 04:17 PM   #16
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Some additional comments: The air conditinoers in my motor home normally run on 20 amp branch circuits no matter what I"m plugged into. (that is how they were wired at the factory) Right now the one I'm using is running on the park's 20 amp, it's isolated from the rest of the coach electrically. (has it's own plug which can be plugged into the coach)

In re-reading the Original post it was not the extension cord (Which likely was too light weight for a sustained 20 amp load) but the adapter that caught fire.. Now that is supposed to be 30 amp (heavier) wire.. So it had to be defective or worn out for this to have happened. I gave an example of defect in my last post.

I have noticed over time teh plastic around the pins, epically the hot pin, gets discolored indicating high heat.. I do not know why it's the hot pin since in theory, they both carry the same current.

In a 15 amp outlet, I'd know why (The neutral pin is heavier than the hot)
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Old 07-25-2011, 08:16 AM   #17
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Quote:
Originally Posted by wa8yxm View Post
Some additional comments: The air conditinoers in my motor home normally run on 20 amp branch circuits no matter what I"m plugged into. (that is how they were wired at the factory) Right now the one I'm using is running on the park's 20 amp, it's isolated from the rest of the coach electrically. (has it's own plug which can be plugged into the coach)

In re-reading the Original post it was not the extension cord (Which likely was too light weight for a sustained 20 amp load) but the adapter that caught fire.. Now that is supposed to be 30 amp (heavier) wire.. So it had to be defective or worn out for this to have happened. I gave an example of defect in my last post.

I have noticed over time teh plastic around the pins, epically the hot pin, gets discolored indicating high heat.. I do not know why it's the hot pin since in theory, they both carry the same current.

In a 15 amp outlet, I'd know why (The neutral pin is heavier than the hot)
On the bold, the neutral and ground can share the current flow when called on for a heavy draw. Look in your breaker box to see why. That leaves the hot wire carrying much more current on occasion....
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Old 07-25-2011, 06:35 PM   #18
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15AMP with a 15K AC, refrigerator on AC and Inverter/charger probably will get a very hot connection on the adapter.
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