The RV plug and socket serves as an excellent example of why the folks who create the National Electric Code and work with the National Electric Manufacturer's Association (NEMA) should be discredited, then fired.
Yep, I'm being cranky again. Because there is absolutely no reason for this charade of "intelligent design". The existing 30-amp service for RV's is in a word s-t-u-p-i-d
A dedicated design has been around for decades. It offers far superior connectivity, resistance to pull-out and deterioration...

A mandatory changeover to this far safer design is not possible. Why? Because to do so, would imply the regulatory body administration is cursed with triple digit intelligence.
GROWL SNAP