Originally Posted by Woodworker
Never laid out the cord completely. Before I changed over to a removal power cord I pulled the cord all the way out of camper just cause I could. Now, my cord is dropped on the ground, plugged Into camper an plugged into power. If its half ass coiled or half ass stretched out dont care. No fire, no heat, no nothing. Cords will not build heat from electricity unless there is an issue with the power outlet or unit receiving the power.
That's not actually true. If your using near the max power, it will create heat. And if the cord is coiled it can't dissipate the heat. In extreme cases you can melt the coating on the cord. Best practice is to pull it out so as to mitigate the potential for heat build up. It's the same principle as to why they limit the number of wires in a given size metal conduit.
That being said, it's not typical, but it does happen, especially in warmer weather when the outside temp is high plus the AC is pulling max for long periods of time.
The breaker will trip only when it pulls more power than the breaker is built for, typically the pedestal breaker will pop before the RV breaker, just from use and wear and tear. Again it is heat that trips the breaker, similar to heat that melts the filament in a fuse. I told the story before, but one campground I worked at, I had to actually ice down the old breakers on an extremely hot day when everyone returned from the lake and kicked the AC's on. Combination of fuse panel in direct sun, behind the fuse panels were all the compressors for the freezers in the store, and, the campground was over 50 years old. We got by the hour or so when it started to cool down and the sun was low behind trees and the breakers quit tripping.
Heat build up was the culprit.
Just as easy to pull most of the cord out, and let it lay under the RV, allowing the heat to dissipate
Happy Camping.. We leave this weekend heading East this year.