Thanks. One last thing: 690.47(C) has its own set of grounding requirements (C)(1)-(8). So we need to follow those as apposed to 250-166?
- 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 _____ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of R. Walters Sent: Friday, June 19, 2009 10:50 AM To: RE-wrenches Subject: Re: [RE-wrenches] What is a "direct-current system"? I just sort of hit this in a previous post: check 690.47C(3). Your system falls under (C) AC & DC grounding requirements..... This just shouldn't be that hard with the inspectors.... R. Walters Solarray.com NABCEP # 04170442 On Jun 19, 2009, at 10:55 AM, Peter Parrish wrote: 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 <image003.gif>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 <image003.gif> _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
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