[RE-wrenches] Rooftop wiring methods between multiple subarrays

[Max Balchowsky]

Bill, what about using the weeb bonding method for the panels, conduit between sub arrays with mineralac clamps and then the weeb grounding lug for 
the ground wire to the combiner box and then home to the panel. The only time this has been an issue is where the jurisdiction doesn't accept the Wiley product.....
(I never liked what the sun does to PVC conduit)



Max Balchowsky
SEE Systems
760-403-6810 
  


________________________________
From: Bill Brooks <billbrooks7 at yahoo.com>
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Sent: Friday, October 9, 2009 10:20:19 AM
Subject: Re: [RE-wrenches] Rooftop wiring methods between multiple subarrays

  
August and Max,
 
If all you are doing in supporting the conductors, PVC conduit
is sufficient with protective bushings on each end. Once you go to EMT, then
grounding bushings must be installed at both ends and the EGC needs to pick up
those bushings. More expensive and time consuming, but it looks better and you
can span a greater distance. 
 
Bill.
 
From:re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Max
Balchowsky
Sent: Thursday, October 08, 2009 8:29 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Rooftop wiring methods between multiple
subarrays
 
August
- we've been using 1/2" emt between arrays with plastic bushings to
protect wires and a dual "minerallac" clamps ( http://minerallac.thomasnet.com/viewitems/pipe-fasteners/ll-categories-cully-pipe-fasteners-conduit-hangers?&bc=100%7C1006%7C1281&forward=1)
to tie the conduits to the riser on the array support. Has worked well over the
years and the inspectors like the "bond" between the arrays.....



________________________________
 
From:August Goers
<august at luminalt.com>
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Sent: Thursday, October 8, 2009 11:07:08 AM
Subject: [RE-wrenches] Rooftop wiring methods between multiple subarrays



Hi Wrenches,
 
I’m looking for fresh ideas on how to run USE-2 wires between
subarrays on rooftops. Let’s say we have a flat roof commercial system with
dozens of separate rows of modules. How would you folks run the USE-2 wiring
between these arrays? We’ve been using J-boxes and EMT which is robust but time
consuming. I’ve also used strut with a cap strip on the top which effectively
makes a wire raceway but it is difficult to properly ground both ends of the
raceway and is also time consuming. 
 
Looking forward to hearing your ideas. Best, August 
 
August Goers
 
Luminalt Energy Corporation
O: 415.564.7652
M: 415.559.1525
F: 650.244.9167
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