well you could for a 2 prong plug ( not a 3 as the neutral and ground are often bonded).
But I'd really suggest you trace the source of the fault and correct it.
this will protect you and the RV ( fire).
start with the source of power to the RV- test that using a meter.
if you have a twistlock the tang with the right angle is the ground- the next largest is neutral and the smaller is the hot
Mike
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