This is based on an inverter that can be mounted outdoors. Here we cannot mount outdoors and inverters have to be indoors even if it is just a shed due to temp ratings -30 F one many years ago. Most inverters are rated to -14F.
We have to install an AC disconnect external even if the main AC panel is out doors and the breaker could or would serve as the point of disconnect. What does your AHJ require in the colder climates? Dana Orzel Great Solar Works, Inc E - d...@solarwork.com V - 970.626.5253 F - 970.626.4140 C - 970.209.4076 web - www.solarwork.com "Responsible Technologies for Responsible People since 1988" Do not ever believe anything, but seriously trust through action. From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Al Frishman Sent: Thursday, January 13, 2011 9:24 AM To: 'RE-wrenches' Subject: Re: [RE-wrenches] 690.14 (4) Max Number of Disconnects Mark, See answers to your questions below: Al Frishman AeonSolar (917) 699-6641 - cell (888) 460-2867 www.aeonsolar.com <http://www.aeonsolar.com/> From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Mark Frye Sent: Wednesday, January 12, 2011 5:26 PM To: 'RE-wrenches' Subject: Re: [RE-wrenches] 690.14 (4) Max Number of Disconnects OK, So what is your plan with regard to 690.14 (D)? All inverters will have a integrated DC disconnect and I will install a AC Disco. next to each inverter. It is interesting to ask, do the disconnects required by 690.14 (D) also have to comply with or be counted in with 690.14 (4) and (5). 690.13 and 690.14 are pretty confusing in the use of the term disconnect. Which sections apply to the disconnecting DC PV source circuits and which sections apply to AC PV system circuit, which to both? Can the switches integrated into some inverter by the manufacturer be regarded as the disconnects required in these sections? Here is my take: The fused disconnect in the basement is the PV system disconnecting means of which there is only one. This switch meets the requirements of 690.15 "...A single disconnecting means in accordance with 690.17 shall be permitted for the combined ac output of one or more inverters or ac modules in an interactive system." It meets the requirements 690.14 (C) (1) Exception so long as you comply with 690.31 (E). You still need additional disconnects on the roof and labelling in accordance with 690.14 (D), but they don't have to comply with 690.14 (4) (5) so long as there ac outpust are routed thru the 8th floor load center and thru the switch in the basement. I assume that the fused disconnect is co-located in the basement with the service equipment? yes Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _____ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Al Frishman Sent: Wednesday, January 12, 2011 1:55 PM To: 'RE-wrenches' Subject: Re: [RE-wrenches] 690.14 (4) Max Number of Disconnects Hi Mark, Two will be in the same room as the panel and the rest will be located on different sections of roof. Al Al Frishman AeonSolar (917) 699-6641 - cell (888) 460-2867 www.aeonsolar.com <http://www.aeonsolar.com/> From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Mark Frye Sent: Wednesday, January 12, 2011 4:49 PM To: 'RE-wrenches' Subject: Re: [RE-wrenches] 690.14 (4) Max Number of Disconnects Al, Are the inverters located inside on the 8th floor with the MLP panel or are they located on the roof? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _____ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Al Frishman Sent: Wednesday, January 12, 2011 1:11 PM To: re-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] 690.14 (4) Max Number of Disconnects Hi Wrencher's I am working on a system with 10 inverters. The output of all 10 single phase inverters will be combined in a main lug only panel located on the 8th floor (each inverter will have a 2 pole breaker). The MLO Panel will be protected by a fused switch located in the basement. Does the panel on the 8th floor used to combine all 10 inverters need to have a main breaker in order to comply with 690.14 (4)? Any and all feedback is appreciated. Al Frishman AeonSolar (917) 699-6641 - cell (888) 460-2867 www.aeonsolar.com <http://www.aeonsolar.com/>
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