Ufer Ground & Ground Rods

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This is an issue we have just started to address here. When using a #4 wire where do you bring it out of the footing at? Inside the wall, outside the wall and do you bring it out the top of the footing or out the side of the form. I have yet to put one in so any ideas/experience would be much appreciated.
 
If I have a rebar ufer (inspected) stubbed up under my panel can I use a acorn nut to attach my ground to it and does the connection have to be accessible? I've "heard" that is supposed to be accessible in that scenario. If so what if you use something like a Burndy crimp for attaching it?
 
iaov,

Around here, for residential services, the #4 copper is almost always brought up through the foundation stem wall and out the top. I can't remember an instance where it wasn't done that way. For non-residential services, the conductor is routed to, and brought up at the service disconnect location. For these applications, the conductor usually does not come out of the top of the foundation stem wall. I'm not aware of a code requirement either way.

wawireguy,

250.68(A) requires the GEC connection to the grounding electrode to be accessible. Exception No. 1 would cover the connections made within the concrete, but would not apply if the rebar is brought out of the concrete.
 
If a piece of 20-foot rebar is bent to bring a piece up out of the foundation,
then less than 20 feet remains encased.
To solve this problem, many inspectors require 2 pieces.
As per Electrical Inspection of Existing Dwellings - Douglas Hansen.
 
Matt Faust said:
If a piece of 20-foot rebar is bent to bring a piece up out of the foundation,
then less than 20 feet remains encased.
To solve this problem, many inspectors require 2 pieces.
As per Electrical Inspection of Existing Dwellings - Douglas Hansen.
Click to expand...
It would be somewhat rare, at least in this area, not to have additional re-bar in the foundation. The code does not require that the 20 foot of re-bar be in a single piece. The stubbed out piece would be connected to the other re-bar in the concrete.
 
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