I have a LA Dept. of B&S inspector cite Article 690.47(B) "Direct-Current Systems" and its consequent grounding requirements (250.166(A)(B)) in connection with a very straightforward grid tied PV system (i.e. no batteries, just PV and a Xantrex GT inverter).
He said that since there is a DC circuit as well as an AC circuit, 690.47(B) applies. I countered that all PV systems have a DC circuit, so to separately call out a "Direct-Current System" must apply to something other than the DC PV circuit inherent in all PV systems. Am I missing something here? Is "Direct-Current System" defined in Article 690? We are working off NEC 2008. Thanks in advance for your help. - 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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