[RE-wrenches] Supply side tap not allowed

[Philip Boutelle]

Jeff,

I'm guessing that the document your AHJ saw or is referring to is here, and
might help you prepare for the meeting with the AHJ:

http://www.ul.com/global/documents/corporate/aboutul/publications/newsletters/electricalconnections/april10.pdf

I got wind of this document from John Wiles, and he has always been pretty
adamant about panels being listed for a supply side tap, which they usually
aren't, especially if it is a meter/main combination (or an old Zinsco).
Good luck, and let us know how it goes.



Phil Boutelle

Project Engineer
NABCEP Certified Solar PV Installer TM
Real Goods Solar, Inc.

www.RealGoodsSolar.com <http://www.iesolar.com/>



[image: cid:image001.png at 01CA4E40.031FCE50]



On Thu, Jun 17, 2010 at 11:45 AM, Jeff Oldham <starpower4u at juno.com> wrote:

> Thanks all for the good feedback. A service upgrade to this flush mount
> meter/main is beyond what the owner cares to spend as it is a major project
> being it is in a wall that is extremely crowded both structurally and
> electrically. There is no way to get between the meter and main w/o any
> modifications to what was UL listed as is. There is no distribution section,
> it is 200' away and trenching through landscape, gardens and patio's are not
> an option either.
>
> I know all about the horror stories over Zinsco, but the vast majority of
> their problems are in the distribution panels not these simple meter/main's
> with only one breaker that is rail mounted w/o those funky bus and breaker
> "connections" to it. This is a bigger picture issue that I'm raising here -
> having to secure a written letter from the manu on how to tap their panels
> on ALL jobs that are over 120% of bus rating regardless of panel brand or
> age. I agree that service taps rules apply here as do fill calcs and that a
> listed tap meeting fill allowances does not modify the panel to the point of
> UL violation. I'm meeting with the County head of Building next week to
> discuss further....
>
>
> -jeff o
>
>
> From the Solar, Wind and Hydro powered office of Jeff Oldham/Regenerative
> SOLutions
>
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