Hi Gari,
I'd be very careful with bus duct in a wet (or even a 'damp' area). I would strongly recommend that you consider cable bus. I have not spec'd bus duct in more than 30 years, it's cable-bus all the way.
BTW what are the voltage and ampacity requirements? Approximate length?
ps I am not aware of any Code that defines the enclosure rating for bus-duct in a trash area. Is this actually a wet or damp area? Is it indoors or outdoors? What has the mounting elevation of 12ft above FF have to do with the enclosure rating?
GG
"I have not failed. I've just found 10,000 ways that won't work." Thomas Alva Edison (1847-1931)
I do not know much about bus ducts but a co-worker some time ago passed me this catalog (attached) that he was using to select an outside bus duct system.
Maybe it can help you a little.
Good luck!
JBC
.......
"The more I read, the more I acquire, the more certain I am that I know nothing"
