#6 to rebar ground?

[ivsenroute]

Believe it or not I've always used a ground rod clamp and it's passed, but I think they do make a clamp specifically for 1/2" rebar to attach the GEC. The type of clamp shouldn't be dependent on whether it's encased or not, but I suppose you should use the one that's listed for the rebar. Still, like I say, the rod clamp has always passed.

250.70 gives you lots of options. The big item is that they have to be listed for the application so as long as your product is listed for attachment to an electrode whether it is a CEE using rebar or copper wire, you can use it.