In the past I determined that anything above a 4 pitch on standing seam roofs
would require rails. Just too difficult otherwise. I would recommend the use
of rails all the time however on larger systems, there can be significant added
cost. Because the seams don't align as a perfect multiple of the module length
or width, you do end up having some modules with a greater spacing between
supports than perhaps the module spec sheet requires. Additionally I have
found that for multiple home run strings, a stainless steel retaining clip
dunked in rubber (mfg that way), is a good way to bundle the wires. Even
better is to use a flexible conduit with a slit to run the home run wiring up /
across under the array, where the conduit supports are on S-5 clips. Sorry
don't have access to pictures at the moment.Mike KocsmierskySpirit Solar
From: "re-wrenches-requ...@lists.re-wrenches.org"
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Sent: Thursday, January 11, 2018 3:43 PM
Subject: RE-wrenches Digest, Vol 11, Issue 13
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Today's Topics:
1. Wire management with S5! Railless System (Hilton Dier)
2. Re: Wire management with S5! Railless System (August Goers)
3. This is as admin test message, please do not respond
(Michael Welch)
4. This is as admin test message, please do not respond
(Michael Welch)
Add my voice to the “never without rails” chorus.
1) S-5 clamps are only as good as the standing seam they are on. At least rails
spread out the stresses and avoid large point loads.
2) Ice likes to slide. Rails give some height above that.
3) Rail height gives better ventilation and hot weather performance.
4) Module width is never an even multiple of roofing pan width. No rails means
inevitably some modules will be “diving boards.”
5) Without rails, getting the modules to an even height is a giant PITA. Takes
forever. I did it once and never again.
Best
Hilton
Hilton Dier III
Renewable Energy Design
Missisquoi River Hydro LLC
Ray - I agree with the others that S5 clamps with rails is the way to go on
standing seam roofs. We buy our S5 clamps through LMCurbs and I've found
their pricing and service to be good: http://www.lmcurbs.com/
We go though a good deal of effort to determine the exact standing seam
make/model and then procure the S5 clamps that are specifically designed
for the roof. Even then, sometimes the seams need to be compressed a bit to
slip the clamp over. You can squeeze the seams with a large pair of channel
locks with a piece or cardboard to protect the channel lock teeth from
marring the metal standing seam coating.
If you still need to run PV wires along modules frames without rails,
HellermannTyton might make a product that will work for you:
http://www.hellermanntyton.us/industry.aspx?id=3132
You might be able to get a solar sampler kit from them to find a good fit.
Best,
August
Luminalt
On Wed, Jan 10, 2018 at 9:18 PM, Ray <r...@solarray.com> wrote:
> Hi All;
>
> I was wondering what folks were doing these days for wire management on
> Standing seam roofs with the S5! clamps and no rails. I'm at a loss (once
> again) for how to secure the home runs without a rail. I have some of
> those module edge clips, but those only hold one wire, and I've had them
> slip off (wire dangling visible from ground.)
> Also most suppliers seem to only carry the universal S5! clamps, but I
> have found those to really bend up the metal on certain types of standing
> seam roofs. I wanted to order the recommended model for the particular
> roof. AEE quit carrying S5 altogether.
> Give me your Standing seam wisdom.
>
> Thanks,
>
> Ray Walters
> Remote Solar
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Hi gang. I'm still testing file attachments, please do not respond.
Sorry to bother you with these, but getting this figured out is important.
Hi gang. Yet another test, please do not respond.
Sorry to bother you with these, but getting this figured out is important.
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