It is normal for a 30 AMP or 50 AMP plug on an RV to generate some heat when major 120 volt electrical appliances are running in an RV.
The problem is I cannot tell you if the heat you feel coming from your plug is normal or not. If the plug is so hot that you cannot keep your fingers on it then you may have some problems, but some people are more sensitive to heat than others.
One suggestion I have is if you are in a RV Campground you might want to ask another RVer near you if you can feel their plug (be careful how you ask this question as it could be misunderstood by the person you’re asking and embarrassing to you). :-) If the plugs feel the same then you should be OK.
My motto when it comes to possible electrical problems in an RV is "If In Doubt Have It Checked Out". You may want to have a Certified RV Technician check out the electrical system in your RV just to be on the safe side.
I hope this helped.
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