I would consider the inside of a raceway to be a wet location if the environment the race way in placed in is a wet loaction. I was always told that threads made up wrench tight are for grounding and physically vialble reasons, not to keep water out. Which is also why we don't dope our threads. If we were trying to keep it water tight, shouldn't we use pipe dope?
Just last week I was changing wires out in a residential remodel. This was a 2nd floor bedroom originally done in EMT. Who would dare call this a wet or damp location? Yet my hands were covered in rust at the end of the pulls. And if this is the case in a dry location, how much more could we expect this in a wet loaction??
