[RE-wrenches] Array Grounding (was WEEB)

R Ray Walters ray at solarray.com
Tue Sep 14 01:53:33 PDT 2010


Maybe this should be on the NABCEP test.

R. Walters

On Sep 13, 2010, at 8:04 PM, benn kilburn wrote:

> Hopefully any crew installing PV, and familiar with this debate (which they should be) can easily distinguish between the GBL-4 and the GBL-4DBT.  The weight difference is quite noticeable.  If it feels light for its size, it's aluminum, dont use it!!!  If it has some distinct weight to it, then it's most likely the copper DBT, giv'er!
> 
> 
> On Sep 12, 2010, at 5:41 PM, Jamie Johnson wrote:
>  That looks like a tin plated aluminum lug (aluminum corrosion) with a plated steel screw (rusted screw).......
>  
> Here is an explanation of the differences between both ILSCO GBL 4 lugs from John Wiles Code Corner in Homepower issue 102
>  
> "The Ilsco GBL-4DBT is a lay-in lug
> made of solid copper, which is then tin-plated. It has a
> stainless steel screw to hold the wire. The lug accepts a #14
> (2 mm2) to #4 (21 mm2) copper conductor. It is listed for
> direct burial (DB) and outdoor use and can be attached to
> aluminum structures (the tin plate). The much cheaper Ilsco
> GBL-4 lug looks identical, but is tin-plated aluminum, has
> a plated screw, and is not listed for outdoor use."
>  
> 

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