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

[Chris Mason]

How about this
http://www.nassauelectrical.com/products/teck-cable-armored-with-pvc-jacket/teck-90-armoured-power-single-conductor-1000v-xlpe-pvc-aia-pvc


On Tue, May 17, 2016 at 6:52 PM, Howard Arey <scot.arey at solarcentex.com>
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
>
> https://www.facebook.com/SolarCentex
>
> http://www.solarreviews.com/installers/solar-centex-reviews/
>
>
>
> [image: Solar Centex Logo - No Back.png 10 percent resize]
>
>
>
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-- 
Chris Mason
NABCEP Certified Solar PV Installer™
Solar Design Engineer
Generac Generators Industrial technician

www.cometsolar.com <http://www.cometenergysystems.com>
264.235.5670
869.662.5670
Skype: netconcepts
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