Kirpal, it looks like Unirac needs to make their requirement consistent-
I was using
http://www.unirac.com/pdf/ii227.pdf (dated Sep '09)
as my source which differs from your source (dated Feb '09)
I like your 225_5 layout better, though. The more grounding the merrier.
-------- Original Message --------
Subject: Re: [RE-wrenches] Bonding Rails
From: Kirpal Khalsa <solarwo...@gmail.com>
To: RE-wrenches <re-wrenches@lists.re-wrenches.org>
Date: 2009/11/17 19:29
Hey Guys....Unirac recently changed their requirement to 2 clips between
each module.......one on the upper rail and one on the lower
rail......therefore by my count you need 2N-2 clips for N modules, you
don't need any clips at the ends of the row of modules........ the
link to their diagram and instructions is:
http://www.unirac.com/pdf/ii225_5.pdf
I think the overall intention is that it is better to not skimp on
grounding.....for all the inner modules in a row they are bonded to the
rails at 4 points, each of the rails has a ground lug. Should any
module be removed for any reason the remainder of the modules are still
solidly grounded......
My understanding is that Uniracs ground lugs and clips are licensed from
Wiley so I would guess that the Wiley direct ground lugs and clips have
the same requirements......
My take is that this grounding system is soooooo much more convenient
and fast than some of the ground lug to module systems we used to
use.......(and still use in top of pole mounts)...
Cheers,
--
Sunny Regards,
Kirpal Khalsa
NABCEP Certified Solar PV Installer
Renewable Energy Systems
www.oregonsolarworks.com <http://www.oregonsolarworks.com>
541-218-0201 m
541-592-3958 o
On Tue, Nov 17, 2009 at 1:47 PM, Peter Parrish
<peter.parr...@calsolareng.com <mailto:peter.parr...@calsolareng.com>>
wrote:
That still works to approximately one clip per rail (actually N-1
clips for
N modules). - Peter
Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
CA Lic. 854779, NABCEP Cert. 031806-26
peter.parr...@calsolareng.com <mailto:peter.parr...@calsolareng.com>
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885
-----Original Message-----
From: re-wrenches-boun...@lists.re-wrenches.org
<mailto:re-wrenches-boun...@lists.re-wrenches.org>
[mailto:re-wrenches-boun...@lists.re-wrenches.org
<mailto:re-wrenches-boun...@lists.re-wrenches.org>] On Behalf Of
Dave Click
Sent: Tuesday, November 17, 2009 1:09 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Bonding Rails
Yes, that's correct. In my answer I was just rephrasing it to say you'd
need twice as many WEEBs as you think. As I understand it, the intent of
this layout is to give the installer two chances to bond each module
properly to the rail.
Unirac has a similar requirement for its UGC-1s on SolarMount, but in
their schematic they don't require you to bond to both rails. So if you
have four modules, you need UGC-1s between A&B, B&C, C&D but you can
have them all on a single rail. I think it's better to alternate between
rails anyway: A&B (top rail), B&C (bottom rail), etc.
DKC
-------- Original Message --------
Subject: Re: [RE-wrenches] Bonding Rails
From: Peter Parrish <peter.parr...@calsolareng.com
<mailto:peter.parr...@calsolareng.com>>
To: 'RE-wrenches' <re-wrenches@lists.re-wrenches.org
<mailto:re-wrenches@lists.re-wrenches.org>>
Date: 2009/11/17 15:55
> On page 8 it would appear that we need TWO WEEB clips bonding
modules A
and
> B to rails #1 and #2 and another TWO WEEB clips bonding modules C
and D to
> rails #1 and #2, etc. - Peter
>
> -----Original Message-----
> From: re-wrenches-boun...@lists.re-wrenches.org
<mailto:re-wrenches-boun...@lists.re-wrenches.org>
> [mailto:re-wrenches-boun...@lists.re-wrenches.org
<mailto:re-wrenches-boun...@lists.re-wrenches.org>] On Behalf Of
Dave Click
> Sent: Tuesday, November 17, 2009 12:14 PM
> To: RE-wrenches
> Subject: Re: [RE-wrenches] Bonding Rails
>
> Peter,
>
> (1) it appears that per the WEEB installation manual:
> http://www.we-llc.com/Datasheets/104-0404-000008-008.pdf
> (page 8) you need to have one WEEB per module rather than one for
every
> other module as you suggest.
>
> (2) 690.43 Equipment Grounding.
> Exposed non-current-carrying metal parts of module frames, equipment,
> and conductor enclosures shall be grounded in accordance with
250.134 or
> 250.136(A) regardless of voltage.
>
> I guess the latter answer depends on whether your AHJ considers the
> rails "exposed"-- I would, so in this situation I'd have lugs on each
> module and each rail.
>
> DKC
>
> -------- Original Message --------
> Subject: [RE-wrenches] Bonding Rails
> From: Peter Parrish <peter.parr...@calsolareng.com
<mailto:peter.parr...@calsolareng.com>>
> To: 'RE-wrenches' <re-wrenches@lists.re-wrenches.org
<mailto:re-wrenches@lists.re-wrenches.org>>
> Date: 2009/11/17 14:56
>
>> We have been using WEEB clips on all of our installations for over a
>> year now. We include the WEEB data/installation sheets in our permit
>> package and patiently point out the clips to inspectors who
haven't seen
>> the WEEB system yet.
>>
>>
>>
>> Two questions:
>>
>>
>>
>> (1) For ProSolar rails, can we use one WEEB clip to bond two
>> adjacent modules (say, modules A and B) on the upper rail (say,
rail #1)
>> and then use a second WEEB clip to bond the next two adjacent
modules
>> (say, modules C and D) on the lower rail (say, rail #2) and then
use a
>> listed lay-in lug (with in our case a WEEB clip) to bond to
either rail
>> #1 or #2 to continue the grounding?
>>
>> (2) If we DON"T use WEEB clips and use the conventional bonding
>> methodology per module manufacturer's instructions (proper
location on
>> the module, and listed screws, washers and nuts), do we have to ALSO
>> bond the rails? We have an inspector in Pasadena, CA that is
requiring
>> this, but this is the first time we have been required to do so.
Perhaps
>> in the past year in ignorant bliss we have missed an important
>> development? Or have we been dodging bullets for seven years and not
>> even knowing it?
>>
>>
>>
>> - Peter
>>
>> Peter T. Parrish, Ph.D., President
>> California Solar Engineering, Inc.
>> 820 Cynthia Ave., Los Angeles, CA 90065
>> CA Lic. 854779, NABCEP Cert. 031806-26
>> peter.parr...@calsolareng.com
<mailto:peter.parr...@calsolareng.com>
<mailto:peter.parr...@calsolareng.com
<mailto:peter.parr...@calsolareng.com>>
>> Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885
>>
>
>>
>>
>>
>>
>>
>>
------------------------------------------------------------------------
>>
>> _______________________________________________
>> List sponsored by Home Power magazine
>>
>> List Address: RE-wrenches@lists.re-wrenches.org
<mailto:RE-wrenches@lists.re-wrenches.org>
>>
>> Options & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive:
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
<http://www.re-wrenches.org/etiquette.htm>
>>
>> Check out participant bios:
>> www.members.re-wrenches.org <http://www.members.re-wrenches.org>
>>
> _______________________________________________
> List sponsored by Home Power magazine
>
> List Address: RE-wrenches@lists.re-wrenches.org
<mailto:RE-wrenches@lists.re-wrenches.org>
>
> Options & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
<http://www.re-wrenches.org/etiquette.htm>
>
> Check out participant bios:
> www.members.re-wrenches.org <http://www.members.re-wrenches.org>
>
>
>
> _______________________________________________
> List sponsored by Home Power magazine
>
> List Address: RE-wrenches@lists.re-wrenches.org
<mailto:RE-wrenches@lists.re-wrenches.org>
>
> Options & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
<http://www.re-wrenches.org/etiquette.htm>
>
> Check out participant bios:
> www.members.re-wrenches.org <http://www.members.re-wrenches.org>
>
>
_______________________________________________
List sponsored by Home Power magazine
List Address: RE-wrenches@lists.re-wrenches.org
<mailto:RE-wrenches@lists.re-wrenches.org>
Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive:
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
<http://www.re-wrenches.org/etiquette.htm>
Check out participant bios:
www.members.re-wrenches.org <http://www.members.re-wrenches.org>
_______________________________________________
List sponsored by Home Power magazine
List Address: RE-wrenches@lists.re-wrenches.org
<mailto:RE-wrenches@lists.re-wrenches.org>
Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive:
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
<http://www.re-wrenches.org/etiquette.htm>
Check out participant bios:
www.members.re-wrenches.org <http://www.members.re-wrenches.org>
------------------------------------------------------------------------
_______________________________________________
List sponsored by Home Power magazine
List Address: RE-wrenches@lists.re-wrenches.org
Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out participant bios:
www.members.re-wrenches.org
_______________________________________________
List sponsored by Home Power magazine
List Address: RE-wrenches@lists.re-wrenches.org
Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out participant bios:
www.members.re-wrenches.org
