I finally stopped arguing about ground rod depth after talking to an old timer in Tulsa

Been doing residential installs for 8 years now. Always went by the book, 8 feet deep, no exceptions. Last month I was on a job and this retired electrician who owns the house came out and watched me hammering. He asked why I was going so deep when the ground here is pure clay. I told him code is code. He just laughed and said he has pulled rods at 4 feet in this soil that tested better than ones he saw driven 8 feet in sand. That conversation stuck with me. I looked up the local amendments and sure enough, there is more flexibility than I thought. Not saying the book is wrong, but maybe there is more nuance than the training class let on. Has anyone else run into inspectors who are cool with shorter rods if the soil test proves it?

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patricia_gonzalez26d ago

3 foot rod in clay is basically a lawn ornament, but that old timer probably has a 1950s truck still running on original wiring so he might know something. I had an inspector in Oklahoma tell me if the rod goes in easy, you're doing it wrong, but then another one said he'd pass a 4 footer if the test clamp showed under 25 ohms. The code book says 8 feet but it also says "unless you can prove otherwise", which nobody reads past the first sentence. I think the real lesson is the book is a minimum, not a magic number, and old guys love watching apprentices sweat for an hour. Next time I'm bringing a bucket of water and a prayer, see if that counts as a soil amendment.