wire... insults that is.... [RE-wrenches]

[Geoff Greenfield]

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Wow - my apologies for an accidental insult that was not meant as an insult
at all...

After loosely following the wire loss thread (and your constant reference to
being "in the books"), I gained the impression (I'm sure an accurate one)
that you are a lot more familiar with the NEC than I.  I am prone to making
obscure references and seeking humor in any way possible (see Matt Lafferty
inspired signature on original post), and in this case it backfired and sent
an unclear message.  The clear one would have been - "I have a question and
do not know where this may be covered - you more NEC savvy and field
experienced wrenches, please point me in the right direction." (in other
words... "Ray - keep your head in that NEC book a wee bit longer and help me
with this other NEC question")

I received good answers to my questions - one even from the president of
SMA-US!  This list is fantastic, and I certainly will be more careful with
my posts.



Sincerely,

Geoff Greenfield
NABCEP Certified Solar PV Installer TM
GLREA Certified Photovoltaic Systems Integrator/Installer License Number
0211-01

THIRD SUN SOLAR AND WIND POWER Ltd.
340 West State Street, Unit 25
Athens, OH 45701

Phone (740) 597-3111
Fax   (740) 597-1548

www.third-sun.com



	Re: wire... insults that is....
	By ray at solarray.com

------------------------------------------------------------

Date: Sat, 17 Apr 2004 18:54:14 -0700
From: Solar Ray <ray at solarray.com>
Subject: Re: wire... insults that is....




>Hey Geoff,

I took your advice and I think I'll be able to add that NABCEP certificate
to my degree in engineering. Did you actually have some constructive
criticism or technical comment to make or were you just being goofy?
I was using the 2% rule for PV array wire sizing back in the 80's, and I
thought now it was time to progress.
There basically are two different approaches: the electrician checks volt
drop, the engineer takes it to a full project lifetime benefit-cost
analysis. We both start with Ohm's law.
For PV arrays, its really NOT volt drop, its power loss. Volt drop is more
of a load side concern, where certain equipment malfunctions if the voltage
sags too far below its nominal input rating. We have always just used the
same calculations for lack of nothing better.
My job is to question, push the envelope a little, and get you guys to
think outside the box sometimes. To really bring solar into the mainstream,
we have to continue to improve the longevity and energy output of our
systems while bringing DOWN the cost. My previous posts were meant to open
a dialog.
I welcome your input, corrections, mild insults, etc., just back your
statements up with some facts.

Thanks,

Ray Walters



>Ray - keep your head in that NEC book a wee bit longer...
>
>
>
>Sincerely,
>
>Geoff Greenfield



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