[RE-wrenches] Plastic washers

[Ray Walters]

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 
> <larry at starlightsolar.com <mailto:larry at 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.peltz at gmail.com 
>> <mailto:jay.peltz at 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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