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 Post subject: Re: Electrical grounding of Unirac SunFrame rails
PostPosted: Mon Sep 29, 2008 4:51 pm GMT EthGMT 
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Fish Eggs
Fish Eggs

Joined: Mon Aug 28, 2006 6:01 pm GMT EthGMT
Posts: 6
Hi Scott,
Yes, that's right, drill a hole just below the frame holder and put a S.S. nut and bolt there to hold the lug which will then penetrate the anodizing. Sorry I don't have pic's...

-Rick-


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 Post subject: Re: Electrical grounding of Unirac SunFrame rails
PostPosted: Wed Oct 22, 2008 10:45 pm GMT EndGMT 
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Minnow
Minnow

Joined: Tue Sep 09, 2008 4:51 pm GMT EthGMT
Posts: 19
Location: Orlando, FL
Went to Solar Power International 2008 in San Diego and talked to Unirac directly about the issue of grounding the SunFrame rails. They are now selling a "special bolt" to use with the SunFrame rails and the WeebLugs. Got a picture today of their solution that I thought I would share. The only issue is that the WeebLug is installed on the side of the frame that is typically facing the eaves of the roof. So if there are any splices in the lowest rail, then the WeebLugs will be clearly visible. I've uploaded a picture of their solution as a file attachment.

Scott.


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SunFrameGounding.jpg
SunFrameGounding.jpg [ 289.65 KiB | Viewed 4759 times ]
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 Post subject: Re: Electrical grounding of Unirac SunFrame rails
PostPosted: Thu Oct 23, 2008 1:43 am GMT ErdGMT 
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Guppy
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Joined: Mon Mar 20, 2006 7:58 pm GMT EthGMT
Posts: 214
Location: pittsburgh
thanks for posting that. looks like tight clearance to fit the connector making the point of the drilling critical or you'd get a hole too big and if drilled too low it could weaken the rail.


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 Post subject: Re: Electrical grounding of Unirac SunFrame rails
PostPosted: Thu Oct 23, 2008 10:07 am GMT ErdGMT 
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Guppy
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Joined: Fri Aug 04, 2006 10:24 am GMT EthGMT
Posts: 284
Location: Los Angeles
Dang, that looks like it all mill finish aluminum. but worse, I don't see any fancy lug that digs into the aluminum, or is it hidden between the rail and ground adapter ? All I can see is a split ring lock washer, which can't be a good UL ground.

Mike (coastal kalifornia fog belt where this stuff will be swiss cheese in 7 years) 90045

_________________
"Since the dawn of time it has been mankind's dream to blot out the sun"
Montgomery Burns


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 Post subject: Re: Electrical grounding of Unirac SunFrame rails
PostPosted: Thu Oct 23, 2008 11:31 am GMT ErdGMT 
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Minnow
Minnow

Joined: Tue Sep 09, 2008 4:51 pm GMT EthGMT
Posts: 19
Location: Orlando, FL
Mike,

The rail is anodized aluminum. The WeebLug is tin-plated. You can just make out the thin sheet of material which has the raised holes to puncture the anodization and give a gas-tight contact between the lug and the rail. This is the standard WeebLug procedure just attached in a different place on the SunFrame rails as opposed to the SolarMount rails.

Scott.


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