You just as well put in a solid piece of wire in place of the 50 amp breaker. If you do not upgrade the wire to something like 4 AWG, the 80 amp will overload the 10 AWG wire and burn it up and maybe your trailer, too.
I can't believe there are electricians chiming in here and not questioning the use of an 80 amp CB on a circuit that is clearly not designed for 80 amps.
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