Originally Posted by Oakman
We must be hanging out in different types of parks and campgrounds. I can't recall ever seeing a single 30 amp breaker for both the 30 and 20 amp outlets.
A LOT of older campgrounds (many I have stayed at) do not offer 50 amp service at all camp sites. They can have 30 amp "loops" offered at lower rates.
The 30 amp pedestals may or may not have a 20 amp outlet. Those that do may be either/or and not necessarily both. In fact if you try to use both, the campground manager may try to charge you the 50 amp site rate with none of the perks of the newer site.
If the pedestal is wired off a 30 amp single feed, the 20 amp duplex may be wired as a sub panel off the 30 amp breaker. In these boxes, the total available current will be 30 amps; limited to 20 on the duplex. These are found most often in the "small camper/tent" areas.
Wish I had taken photos of how they were wired inside but this heavily used PA KOA (30/20) was limited to 30 amp in total; and even then barely! as you can see from the summer voltage.
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