what is the requirement when a raceway is run from the interior to the exterior of a building?
I can't seem to find the article. So if someone could point me in the right direction it would be much appreciated. Thanks
If I did not know where to find the answer to that question I would probably start in the section that deals with the raceway that I was running.
If I did not find the answer there I would look to Article 110, Requirements for Electrical Installations or Article 300, Wiring Methods.
Article 300 seems to be a catch all for a lot of general codes for raceways, you might want to look there think about what a raceway is subjected to going from inside to outside.