Electrical Questions? Ask an Electrician Online.
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1) Please provide additional details? You mention a trailer. Is this a mobile home or an RV?
2) Yes, 240 volt circuits will reside on a double pole circuit breaker. If circuits are making noise, for safety reasons, kill power to the branch circuit breaker until the problem can be identified and corrected.
3) Did water come into contact with any receptacles?
Since I have not heard back from you, I will opt out of the question and place it back to the open board.
No need to reply back to me, you will be notified if another expert picks up the question.
Like Kevin stated in his second point kill the power until a electrician comes and looks at the problem. Always as a safety precaution assume they did come into contact with water, because this can certainly cause someone to get hurt or even cause death. Kill the power, and wait for the electrician to arrive.