i have a slight disagreement with some co-workers about 4/o ser under the 2008 code. they are saying we can still use it as long as it does not run through the attic. If it runs say under a home through the crawl space its ok. I say its still limited to the 60c rating and not acceptable unless it carries the total load of the dwelling. I think im right but just wanted a few opinions, i know this topic has been beat up on this forum sorry!