We've used braided, plated ground strap for over a decade. We
inherited the practice from commercial size tracking systems
installed in the 70s and early 80s.
Anixter wire is our supplier. I can get you a part number if you
need. We isolate it from direct contact with aluminum, with stainless
hardware.
I've seen solid copper strain harden and break after several years of
seasonal tilt adjustments.
Ray
On Aug 22, 2008, at 9:46 AM, Wind-sun.com wrote:
I was under the impression that braided or fine strand wire was a
no-no for grounding because it corrodes so much faster and easier
than solid wire.
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Northern Arizona Wind & Sun - Electricity From The Sun
Solar Discussion Forum: http://www.wind-sun.com/ForumVB/
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----- Original Message -----
From: [EMAIL PROTECTED]
To: RE-wrenches
Sent: Friday, August 22, 2008 8:41 AM
Subject: [RE-wrenches] Braided grounding wire
Anybody know a source for braided grounding wire? Internet search
fruitless......
Holt E. Kelly
Holtek Fireplace & Solar Products
500 Jewell Dr.
Waco,Tx. 76712
254-751-9111
254-228-9621 (cell)
[EMAIL PROTECTED]
----- Original Message -----
From: Kurt Albershardt
To: RE-wrenches
Sent: Friday, August 22, 2008 12:57 AM
Subject: Re: [RE-wrenches] motor starting issues (was: offgrid
systemquestion)
--On Tuesday, August 19, 2008 7:57 AM -0700 Peter Parrish
<[EMAIL PROTECTED]> wrote:
>
> Any motor will need both a voltage and current to operate
properly, and they tend to draw more and more current as the source
(inverter) voltage drops.
Back to basic physics:
Depending on design, electric motors can be constant power or
constant torque (or some combination of two) devices.
Three phase AC motors are generally simpler in design and better
behaved than either either single phase AC motors or DC motors.
Permanent magnet synchronous 3Ø AC motors (available now) closely
approach the theoretical limits of electromechanical motor systems
in general.
Modern power electronics and control systems give us essentially
perfect control of voltage, current, and frequency in AC systems.
Intelligently combining the above allows us to design efficient
electromechanical systems which match nearly any complex supply
impedance. These systems also happen to live longer, fail less
often, and reduce both battery bank and inverter requirements.
The market (arguably free on so many levels, and obviously not on
so many others) can address this using current technology. System
sizing math not has changed fundamentally in several decades but we
are getting closer to those fundamental limits.
Industrial systems are a bit ahead of the consumer market in some
areas but behind in others. As one very basic example, Turbocor's
maglev compressor has created a few waves in the commercial and
light industrial sector but I fully expect some fascinating trickle-
down benefits over next few years <http://www.turbocor.com/
products_technology/>
.
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R. Walters
Solarray.com
NABCEP # 04170442
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