Originally Posted by Old Scout
Think the OP understands that he is close to 30 amps--he is just curious as to why the 30 amp breaker on the "pole" always trips vs the 30 amp in his rig?????? Most of the conversation so far has been to explain why he is using more than 30 amps--think he knows that. The added resistance in his 30 amp cord might be the difference. I am not a big fan of using a dogbone adaptor to put 50 amps down a 30 amp cord--agree that the 30 amp breaker in the rig should protect the cord but any deterioration in the cord or plug-ends will not be protected once you are plugged into 50 amps--just saying......
This is the best post on the subject. I will add that the 30 AMP breaker in the RV might allow a higher load than any of the park breakers that were tripping and there is a slight possibility that it may be defective.
Plugging into a 50 AMP with a dogbone is one way to test the 30 AMP breaker, just apply the same loads and maybe a bit more and it should trip. Remember that the electrical from the dogbone to the panel inside is not properly protected. If the 30 AMP breaker is faulty, there is no protection.