GFCI and isolated grounds on same circuit...

[chconnor]

Hi -

I have a series of outlets on a circuit. One of these receptacles (in the middle of the run) will be an isolated ground. I ran 12/3 to each receptacle leading up to the IG, with the red unused (each just wirenutted to the next leg) and tape-coded green. At the IG box, the red will connect to the isolated ground terminal, and 12/2 continues past that box to serve the rest of the boxes.

I'm now installing receptacles. I want to install a GFCI in the first receptacle of the run with "downstream protection", to protect the entire series of receptacles, and I'm wondering if this IG wiring will affect it's operation.

My thought is that since the GFCI is sensitive to differences between the hot and neutral, and since the IG wiring doesn't affect that, I should be OK.

Thoughts?

Thanks!
-Casey

 

[iwire]

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