I purchased one of these adapters to use at a campground later this month. The power pole at the site has 2-30 amp receptacles, and the owners said that they both can be used. I know the danger of the setup if only one side is plugged in, and I am willing to take the risk for the few seconds that that condition will exist. I will of course change my mind if I get electrocuted...

As I was thinking about other campgrounds, I have seen an extra 20-amp receptacles on some posts in my limited travels. They may have a 30-amp and a 20-amp receptacle on the same post.

Assuming that there is enough power to the post to actually run a full 20 and 30 amp draw, should I be OK using an 30-amp to 20-amp adapter on the 20 amp side of the post? So I would have 20-amps on one leg, and 30 amps on the other?

Since my 50-amp 5th wheel is really 2 legs of 110v, not 220V, I do not see a downside. Am I missing something?

https://www.amazon.com/gp/product/B0756QF5WL/

As I was thinking about other campgrounds, I have seen an extra 20-amp receptacles on some posts in my limited travels. They may have a 30-amp and a 20-amp receptacle on the same post.

Assuming that there is enough power to the post to actually run a full 20 and 30 amp draw, should I be OK using an 30-amp to 20-amp adapter on the 20 amp side of the post? So I would have 20-amps on one leg, and 30 amps on the other?

Since my 50-amp 5th wheel is really 2 legs of 110v, not 220V, I do not see a downside. Am I missing something?

https://www.amazon.com/gp/product/B0756QF5WL/