Module grounding revisited [RE-wrenches]

[Max Balchowsky]

Jerry, the AstroPower Manuel I have tells me to ground the Module frames to
the Rails and the rail ground runs back to the main panel ground. It also
specifys that the grounding must be done so that if a panel is removed from
the string the others must remain grounded.(layin lug) It does say that the
lug can be mounted so that the ground wire can be accessible after module is
mounted against the roof.(drill into module frame?????). I've always
wondered what module manufacturers were thinking (or were they) when they
put the ground screw hole near the middle of the module.......

Max

SEE Systems
100 S. Sunrise Wy
Palm Springs, Ca. 92262
760-403-6810

----- Original Message -----
From: "Jerry Caldwell" <solarcowboy at yahoo.com>
To: <RE-wrenches at topica.com>
Sent: Saturday, November 02, 2002 4:32 PM
Subject: Re: Module grounding revisited [RE-wrenches]


> We often ground the rack only.  Some of the ASE
> modules we use have a thick coat of paint on the
> frames, in which case we use the grounding disks
> provided by ASE to ground the individual modules.
>
> Astropower includes Professional Solar Products
> aluminum mounting rails in thier packaged kits and the
> Astropower installation manual says that only
> grounding the rails is necessary.  I'm not sure, but
> they might even have gotten the assembly listed as
> such.
>
> Jerry Caldwell
> Light Energy Systems
>
> ,
> > wrmiller at slonet.org writes:
> >
> >
> > > Therefore, if one grounds a rack frame, the
> > modules being "secured to and
> > > in electrical contact with" the racks renders the
> > module frames
> > > "effectively grounded".
> > >
> > > Comments?
> > >
> >
> > William,  My own on going test - experiment has been
> > to rely on the frames
> > getting grounded by the rack. I too think the
> > individual ground wire strung
> > panel to panel is stupid and a waste of time.
> > Supporting this hypothesis is
> > 100% ground continuity to every module frame and the
> > main rack. I have tested
> > every installation for ground over many years and
> > never had an ungrounded
> > frame. And I have gone back to old jobs and checked
> > years later. Still good
> > continuity.
> >
> > I think the language you found clearly gives the
> > option to ground the rack.
> >
> > Don
>
>
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