If your crawl space or basement is that "damp" I would be more concerned about black mold than damage to the RX.
If this is a commercial kitchen I would seriously consider it "wet".
I never thought about it until my wife started running a country club with 2 kitchens. They hose that place down every night with steaming hot water. All the appliances and work tables are on wheels so they can pull them out and hose behind them.
That is the thinking behind the universal requirement for GFCIs in kitchens I suppose.
If I was designing one from scratch I would use waterproof plugs like Russell Stoll or IEC309 hanging on SO cord.
