And another 2008 question

[Pierre C Belarge]

I see it in the table, not in the general body of language as per the section number. That makes it very interesting.

I remember reading about the study performed, I think it was in Las Vegas...I thought what happens in Las Vegas, stayed in Las Vegas

Maybe this wording should still be there...that is until they can get it to make more sense...such as does this apply to Conduits installed vertically through the roof?

[M. D.]

2008 NEC

310.15(B)(2)(c)
Conduits Exposed to sunlight on rooftops. Where conductors or cables are installed in conduits exposed to direct sunlight on or above rooftops, the adjustments shown in table 310.15(B)(2)(C) shall be added to the outdoor temperature to determine the applicable ambient temperature for application of the correction factors in table 310.16 and 310.18

My two pennies;

If the conduit through the roof runs directly into the disconnect and it is in direct sunlight there does not seem to be an adjustment in the table to apply , if there is no conduit there is no adjustment to apply , if it is not in direct sunlight (shady side ) no adjustment to apply

[ryan_618]

How would that make it only apply to horizontal though? Call me a simpleton, but no matter how you orient it, the conduit will have a "bottom".

Thats the question, isn't it?

So, if I have one foot of conduit on the roof, do I have to take a 50% (or so) hit?

[M. D.]

What if the cable is not in a conduit???

http://www.afcweb.com/pdfs/afc_pdeck_flyer.pdf

Would this cable need to have the adhustment made.