Difference on listed and Unlisted ground rod

What’s the difference on listed or unlisted ground rod?

Markings at the top of the rod.

minimum size requirement, unlisted needs to be thicker :slight_smile:

Unless things have changed and I am not aware, Unlisted ground rods must be at least ⅝ inch in diameter. Listed ground rods must be at least ½ inch in diameter.

it’s still that

So why do you say unlisted needs to be thicker?

Isn’t 5/8 thicker than 1/2 inch?

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Thank you very much for all your input. :smiley::+1:

Currently. But that could change.