Campground Breakers - EDITED
We have been traveling in our current motorhome for nearly 12 years, with 8 years of it as full timers and the last four at 3/4's of the year so we are very familiar with this coach. I heard somethin...
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Here is what I suspect happened. It was very hot outside, so the A/C units were working harder, thus drawing more amps. Your A/C units are 12 years old, and as they age they often start drawing more amps. Since it was hot outside, everyone else also had their A/C's going full blast, which taxed the system dropping the voltage somewhat but not enough to trip your PI unit. The lower the volts, the higher the amps. The actual plug in the park pedestal could be a little worn creating a connection with your coach that was not the best. The combination of all of this, not just one thing, caused the breaker to trip as it detected an overload.
