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.
Image result for neoprene washers
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 <mailto: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
On Jan 27, 2016, at 6:44 PM, Jay <jay.pe...@gmail.com
<mailto:jay.pe...@gmail.com>> wrote:
Ok here is the long form.
Customers system is in Mexico, Baja. So I'm not concerned about legal
issues.
It is a custom racking design to fit his house.
Flat concrete roof,low tilt design with extra heavy duty engineering
for hurricanes. Easy access for future MX of all fasteners
Owner lives on his own island in the South Pacific.
This is his 2nd ( more?) house.
He wants this. I've told him all of what you all and have said
including that there will need to be future mx to check bolt tightness.
I am going to do it for him.
Thanks for all the advice on where to get look for the parts he's
looking for.
Jay
Peltz power.
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