[RE-wrenches] !000 volt wire for trench-buried extended runs - what type?

[Matt Partymiller]

You will probably use PVwire.  As far as I am aware it will be your least
expensive option.  Get it in aluminum, direct-burial rated if you want. 
Or pre-sleeved in PVC conduit.

Matt


On Tue, May 17, 2016 6:52 pm, Howard Arey wrote:
> Good day, wrenches.
>
>
>
>
> I am installing four dual axis trackers totaling 52KW (13KW per) to four
> individual Fronius Primo 12.5 Primo's.  We've done this setup before
> except this time, we'll mount the inverter at the meter instead of
> carrying inverting at the tracker and carrying 240 volt over a 300+ foot
> ground run for the four combined trackers. And to the heart of this
> question, we'll run under 1,000 volt rules for this commercial ranch
> setup. Goal is to user higher voltages and minimize amps running through
> conductors.
>
>
>
> So my project is:
>
>
>
>
> 4 each 13KW trackers
>
>
> Each tracker is 3 strings of 14 modules and about 705Voc and 520 Vmp.
> This
> combined 3-string output for each tracker will have Isc of 8.89 x 3 = apc
> 27
> amps
>
> We'll pull each set of tracker conductors (4 trackers, plus one more run
> for a 5th tracker) so 10 +/- conductors. I've done the necessary
> conditions of use derates.
>
>
>
> The big question is what would you select as this 1,000 volt rated wire
> for conduit covered installation? PV Wire will get mighty expensive and I
> don't even know if I'll find in 4AWG.
>
>
>
> I ran into this one time before and we just did multiple strings to keep
> in the 600volt category but I don't want to do here because that means I
> double the number of conductors (and go from 3200 to 6400 feet of
> wire.String math and MPP ranges keep me at strings of 14.
>
>
>
> I want to centrally mount the inverters instead of one at each tracker
> for looks and reduce 240 wire sizing.
>
>
>
> What type cable would you use?
>
>
>
>
> Howard "Scot" Arey
>
>
> Owner, Solar CenTex
>
>
> 254-300-1228
>
>
> scot.arey at solarcentex.com
>
>
>
> www.solarcentex.com <http://www.solarcentex.com>
>
> https://www.facebook.com/SolarCentex
>
>
> http://www.solarreviews.com/installers/solar-centex-reviews/
>
>
>
>
>
>
>
>
> _______________________________________________
> List sponsored by Redwood Alliance
>
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
>
> List-Archive:
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.ht
> ml
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
>


Matthew Partymiller
Solar Energy Solutions LLC
(877) 312-7456
matt at solar-energy-solutions.com