We just had that same concern, but once you torque the connection down
there was no noticeable movement. As someone else mentioned the
plastics can be tough to hold up to UV, temperature, compression, and
thermal cycling. Once that hard plastic cracks and falls out, you
definitely will have a loose connection.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 1/28/2016 11:19 AM, jay wrote:
My hesitation to that is the compressibility of the neoprene.
One of the things I like about nylon or similar hard plastics is they
don’t compress so you do get a ridged structure.
jay
peltz power
On Jan 28, 2016, at 10:15 AM, Ray Walters <r...@solarray.com
<mailto:r...@solarray.com>> wrote:
I would use a SS washer with integrated Neoprene rubber gasket. We
use them on roof work, and Unirac uses them under the lag on their
roof flashings.
<images.jpeg>
https://www.copperstate.com/shop/429/neoprene-washers
Thanks,
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 1/28/2016 8:25 AM, Jay wrote:
Hi Larry
I wasn't planning on installing anything between al and al. Just
between SS and al. So the module will still be bolted directly to
the al rack material. I'm not too worried about the grounding, and
certainly not worried enough to install lay in lugs with copper to
each module.
As lones pointed out, there are parts that would insulate the bolt.
But as the owner hasn't requested that, not going to suggest it!
I sure didn't plan on stirring the pot like this.
Just really wanted some help on sourcing the washers
Thanks
Jay
Peltz power
On Jan 28, 2016, at 6:49 AM, Starlight Solar Power Systems
<la...@starlightsolar.com> wrote:
Hey Jay,
I’m still trying to picture this and had a thought: If you isolate
the module from the rack electrically with these washers, and both
are grounded, and the two grounds are not at the same potential
(different length ground runs), you may be creating a path for high
voltage into the array in event of a near lightning strike.
Also, if the washer is between the two metals, how will you isolate
the bolt that puts them together from not touching the sides of the
holes? Perhaps you need to look into non-conductive fasteners as well.
Larry Crutcher
Starlight Solar Power Systems
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