Connections and Understanding [RE-wrenches]

[John Mottl]

There is Tray cable that is rated Sunlight Resistant and Direct Burial that
has a smooth oval outer jacket.  If you are interested I can send you to a
supplier if you contact me directly.
I have seen installations where Tray Cable has worn through in VERY high
wind areas; even when well supported.

John Mottl
----- Original Message -----
From: "William Miller" <wrmiller at slonet.org>
To: <RE-wrenches at topica.com>
Sent: Tuesday, May 21, 2002 7:38 AM
Subject: RE: Connections and Understanding [RE-wrenches]


> Friends:
>
> I am a died-in-the-wool conduit user.  I have been researching this
concept
> of using tray cable.  The samples of tray cable I have seen don't look
that
> robust to me.  Maybe I've been sent the wrong samples. They have grooves
on
> the outside of the jacket.  How does this seal in a gland connector?
>
> Routing of unprotected wire concerns me most of all, for example:  I am
> currently installing a roof-top system in which the modules are in racks
of
> 8, two rows of racks down the length of the roof, modules in strings of 4
> (48 volt system).  I have a combiner on the right end of each row of 16
> modules.  This means I have 10 leads to gather at the combiner (4
> negatives, 4 positives and two grounding wires).  Am I to understand that
I
> would run tray cable, unprotected by conduit, 40 feet from the left most
> module, across the backs of 16 modules, along with the other leads from
the
> modules at the far end of the row, all the way to the combiner?  Hey, I'm
> all for keeping costs down, but I've long ago established standards that
> don't allow wire flapping in the breeze.  Am I missing some hardware that
> is available to protect, support and make aesthetically pleasing these
tray
> cables?  Does anyone have any pictures I could look at of these tray cable
> installations, done well?
>
> If these concerns aren't addressed by the industry, I feel we should
> collectively condemn this wiring method.  Unprotected, unsupported  wire
is
> the same concept as "knob and tube" wiring.
>
> Still wondering........
>
> William Miller
>
>
> At 05:42 AM 5/21/02 -0700, you wrote:
> >Matt and John B.,
> >
> >Great input. The minute any of us think we know it all and stop learning
is
> >the day we seal our ultimate fate. We absolutely need connectors to get
the
> >costs down and the MC connector is a good one. Installers will always
invent
>
>
> __________________________________________________________________
> William Miller
> Miller Power and Communications
> PO Box 50, Santa Margarita, CA 93453
> Voice :805-438-5600 Fax: 805-438-4607 VMail: 805-546-4875
> email: wrmiller at slonet.org
> http://millerpowerandcomm.com
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