CA Traveler wrote:
CGs like houses are usually wired to supply about 40-50% of the pedestals amp rating. Hence every summer low voltage is common with lots of A/Cs running.
In my experienc 50A pedestals are not likely to have low voltage due to better wiring and 12000W rating vs 3600W for 30A.
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No, not true that CGs like "houses" are wired to supply 40%-50% of the service rating.
If it was there would be many more service entrance wiring fires.
I know myself when I personally rewired my entire house the wiring from the pole transformer IS much heavier than the 4/0 aluminum service entrance wire I used. My house originally had a 60A fuse box, I went with a 200A breaker panel.
We experienced a few yrs later during summer, low voltage issues, POCO checked the voltage at my box, at my meter and at the pole. They found the problem was BEFORE the pole that the transformer which service my house was on.
The explanation given was the POCO NEEDED to UPGRADE their high voltage lines feeding my neighborhood. The lines were not sufficient for the additional homes that been added since to lines were put in back in the 1930s.
As a "temporary fix", they installed voltage boosting transformers about 3 miles from my home in between the local substation. That was 25 yrs ago and they have never upgraded the lines.
As for campground pedestal posts, combo 50A/30A/20A boxes must be fed with heavy enough wire to be able to sustain 50A.
30A/20A Pedestal posts must be fed with heavy enough wire to be able to sustain 30A.
If the campground has a long loop or run then that wire must be able to sustain the total of all the pedestal posts on that run or loop. This often means high voltage pole or underground wiring with distribution transformers spaced as needed.
What you are really seeing in campgrounds with low voltage is an issue BEFORE the campgrounds wiring, in other words, it is the POCOs lines which are not sufficient for the more modern heavy loads.
Now, in some cases, you might find the 50A plug in socket a bit less problematic and that means the 30A socket (and perhaps breaker) is worn out and needs to be replaced and that is on the campground management to fix.
You can connect a 30A RV to a 50A socket provided you use a 50A to 30A dog bone adapter and that is what I do to avoid the worn out 30A sockets. I started doing that after noticing my 30A plug starting to melt..
