Leland,
I agree with you, if under the sink is "Damp" then a plumber is needed!
The cabinet in question was a normal kitchen household sink closed cabinet. The EC who asked me about "Damp" locations tells me today that he was failed on a job, because the Dishwasher recpt. needed to be GFI because the AHJ considered it a damp location.
Go figure that one out!
