[RE-wrenches] Integrating with Lightning Protection

[Glenn Burt]

I would think the existing LPS, if as extensive as you suggest, would need to have its interconnections removed, and the LPS installer contracted to re-evaluate and re-install an LPS that also integrates the new array into its protection scheme.

I am assuming this is a commercial rooftop installation, not a residential, pitched roof one.

 

-Glenn

 

From: RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> On Behalf Of Corey Shalanski
Sent: Monday, May 17, 2021 4:35 PM
To: re-wrenches at lists.re-wrenches.org
Subject: [RE-wrenches] Integrating with Lightning Protection

 

Wrenches,

 

I see that this topic was discussed back in 2015 <https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/msg19683.html>  and there were some excellent resources shared on how to electrically integrate PV arrays with existing lightning protection systems (LPS). I am curious if anyone has any advice about how to physically/mechanically integrate a commercial rooftop array with an LPS—particularly wondering what to do when we encounter a network or web of LPS cabling laid out across the roof. I am assuming we should not simply move the cabling without first consulting with the LPS contractor... Can a ballasted racking system viably be placed over top of the cabling? Can ballast bases be placed directly on top of the cabling? or be made to somehow span over or be elevated above the cabling? Or is this just a case where we need to limit the PV array to whatever areas of the roof offer the least interference/convergence with LPS cabling?

 

--

Corey Shalanski

Jah Light Solar

Portland, Jamaica

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