Installation details [RE-wrenches]

[Don Loweburg, Offline]

In a message dated 11/24/2002 7:52:09 PM Pacific Standard Time, 
tom at skylinesolar.com writes:


>  back me up here or tell me where I'm
> wrong!
> 

The ufer ground is very common. Though concrete is not a conductor (same for 
soil)  it is the moisture in the concrete that provides the conduction. The 
moisture in the concrete will be about the same as that of soil. Because the 
conductivity of soil or concrete is low, and  a standard ground rod has 
modest surface area, the ufer provides more surface area and hence a better 
ground path. Corrosion and sacrafice of the ground will be very dependent on 
ground currents and the level of electrolysis. Consistent ground current is a 
sign of some sort system problem.

Don Loweburg

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