[RE-wrenches] wiring methods between arrays

[Jerry Shafer]

How ever its done conduit or channel we really need to reduce the trip
hazard between sub arrays, It does not matter if its enphase or string
inverters keeping the conduit from this hazard should be on the list of "To
Do's" also
Jerry

On Tue, Aug 11, 2015 at 12:19 PM, August Goers <august at luminalt.com> wrote:

> Hi Wrenches,
>
>
>
> I have another best practices questions: what are you doing to run your PV
> wire between arrays on a rooftops? This question has come up on this list
> in the past but I’m still on the hunt for a robust and faster lower cost
> method. We mostly install outdoor boxes on each sub array and then run EMT
> between these boxes. We use strain reliefs to enter the boxes and then
> either keep PV wire or transition to THWN-2 in the EMT depending on the
> layout.  This method takes time and the outdoor boxes aren’t cheap.
> Alternatively, we can run open-ended EMT with ground bushings on the ends
> to bond the conduit. Since ground bushings are designed to be used in boxes
> we switch out the aluminum lug with a tin-coated outdoor rated lug and
> stainless hardware. This technically violates the listing but at least the
> materials hold up. The EMT needs to be carefully bent down at the ends so
> rain doesn’t enter. Lastly, we sometimes run our PV wires along strut or
> angle aluminum (this is the fastest method) which also needs to be bonded
> with a lay-in lug.
>
>
>
> Does anyone have other methods?
>
>
>
> Best,
>
>
>
> August
>
> Luminalt
>
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