Question: Can I run a 50 Amp service to my RV that has a 30 Amp cord and is it safe?
Answer: The first thing to check is whether there is also a 30 Amp outlet at the pedestal. Many campgrounds that offer 50 Amp service have at least two connections at the campsite pedestal, so that 30-Amp RVs can plug into the appropriate power source.
If there isn’t a 30 Amp outlet, then you will need to use an adapter (male at 50-Amp end, female at 30-Amp end of the adapter cord). One caution is that if you have an electrical problem, it is possible, although unlikely, that you will momentarily draw more than 30 Amps, which could lead to damage to your cord or appliances until a circuit breaker trips.
In general, we recommend that you use a good quality surge protector for your electronic devices, which might offer some protection in the event of unforeseen circumstances.