What would be nifty, is if the chase was at the angle of the roof, so
that its top edge was level. Then instead of being a trip hazard it
could be a step.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 8/14/2015 10:18 AM, Jerry Shafer wrote:
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 <[email protected]
<mailto:[email protected]>> 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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