If it is all Grundfos electronics and the panels they specify, then I would get a permit and let the inspector make the decision.
Dave Angelini Offgrid Solar "we go where powerlines don't" http://members.sti.net/offgridsolar/ [1] e-mail offgridso...@sti.net [2] text 209 813 0060 On Tue, 27 Oct 2020 12:11:17 -0700, Brian Mehalic wrote: Well Jay, if you call each of those poles "arrays" then you've got a path around the 2 parallel circuit maximum :) Note 2020 NEC language has changed a bit, though it's still not crystal clear: "PV system dc circuits that exceed 30 volts or 8 amperes shall be provided with dc ground-fault protection meeting the requirements of 690.41(B)(1) and (B)(2) to reduce fire hazards. Solidly grounded PV source circuits with not more than two modules in parallel and not on or in buildings shall be permitted without ground-fault protection." Brian Mehalic NABCEP Certified Solar PV Installation Professional(tm) R031508-59 National Electrical Code(R) CMP-4 Member (520) 204-6639 Solar Energy International http://www.solarenergy.org [3] SEI Professional Services http://www.seisolarpros.com [4] On Tue, Oct 27, 2020 at 11:40 AM jay wrote: HI All, I've got a question about GFDI requirements and do they apply to the following. Here is the project. 1. water pumping DC direct grundfos SQFLex 2. no humans anywhere around 3. no buildings or living structures 4. would be 3 pole mounts: each mount as 1 string, so 3 strings. 2019 code 690.41 B2 says that 2 modules in parallel without humans involved doesn't need GFDI 5. system would be solidly grounded. So what is the requirement for needing GFDI on this project? thanks jay _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org [6] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org [7] There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ [8] http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org [9] List rules & etiquette: http://www.re-wrenches.org/etiquette.htm [10] Check out or update participant bios: http://www.members.re-wrenches.org [11] Links: ------ [1] http://members.sti.net/offgridsolar/ [2] mailto:offgridso...@sti.net [3] http://www.solarenergy.org [4] http://www.seisolarpros.com [5] mailto:jay.pe...@gmail.com [6] mailto:RE-wrenches@lists.re-wrenches.org [7] http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org [8] https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ [9] http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org [10] http://www.re-wrenches.org/etiquette.htm [11] http://www.members.re-wrenches.org
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