Question about the 10'/10% rule - the exception states "adjacent portions of a circuit." How does this apply to an underground conduit run, where there are two ends exposed to higher ambient temperatures than the length in the ground?
For example, what if there is 100 feet in the trench, and 7 feet above grade on either side? Can the exception be applied? How about 200 feet in the trench and 7 feet above grade on either end? Thanks, Brian -- ======================== Brian Mehalic NABCEP Certified Solar PV Installer™ R031508-59 IREC ISPQ Certified Affiliated Instructor/PV US-0132 PV Curriculum Developer and Instructor Solar Energy International Carbondale, CO 81623 http://www.solarenergy.org
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