What are you running for combiner boxes and wire to run at 1000 volts? Seems that I remember that fuses are only good for 600 volts and most boxes the same limit?
What are you using? Just wondering, Bob Ellison From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jerry Caldwell Sent: Thursday, November 03, 2011 5:42 PM To: RE-wrenches Subject: [RE-wrenches] cable spacing in trenches Can anyone direct me to the NEC article that stipulates how many inches of separation must be between cables operating at different voltages? I have a project with PV combiner box home runs at 1,000 volts DC in the same trench with 12.47 kV cables. Table 300.5 shows minimum cover requirements for direct burial cables, but this is the distance beneath grade the cables must be. Is there anywhere in the code that calls for a minimum separation distance between cables at different voltages? Thanks, Jerry Caldwell _____ From: Marco Mangelsdorf <ma...@pvthawaii.com> To: 'RE-wrenches' <re-wrenches@lists.re-wrenches.org> Sent: Thursday, November 3, 2011 2:27 PM Subject: [RE-wrenches] under performing Enphase inverters For the first time, several weeks ago, after 40-50 Enphase installs, we’ve come across at least two M210s that we putting out consistently lower outputs than their immediate neighbors. We replaced the two mods first, which made no difference. Then, in consultation with Enphase, replaced the M210s. After replacing them, the power output was as it should be. Now I’ve got another suspect system with several underperforming mods out of (36). Has anyone else had this experience? Thanks, marco _______________________________________________ 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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