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Peoria, Arizona
Posts: 131
Joined: Feb, 2004
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Gaston, Oregon
Posts: 8139
Joined: Dec, 2003
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 Sprayed Foam Attic #2
[#2] Posted: 01/29/2012 - 1:14:03 PM |  |  |
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How would this be any different from any other garage attic in your area?
Those are modern romex cables with 90-degree conductors inside, and it's unlikely that the amibient temperature down low in the attic in that picture gets much above 140 degrees. So to apply that derating, you'd take 71% of the 90-degree ampacity for those wires. That would yield an ampacity that's still well above the orginal ampacity for the romex cable assemblies.
So derating for temperature, in this case, wouldn't have any effect on the installation.
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Jim Katen, Oregon
www.amipdx.com |
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