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>
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