We went through a similar problem with some beach communities here in SoCal. Because of the high humidity (all winter and summer mornings) they wanted THWN-2 for all conduit runs (as well as PVC instead of EMT). At first we were charged a premium for THWN-2 compared to THHN. But then we found a source at All Phase Electrical Supply Burbank CA (a part of CED) for THWN-2 #10 stranded @ $162.40/k-ft. Brand is En(m?)core Wire. THWN-2 listing is printed on the insulation. - Peter Peter T. Parrish, Ph.D., President California Solar Engineering, Inc. 820 Cynthia Ave., Los Angeles, CA 90065 CA Lic. 854779, NABCEP Cert. 031806-26 peter.parr...@calsolareng.com Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885
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