Ground Rods... again

[oldsparky52]

If he signed the contract and does that it’s breach

Yea, he's in court A LOT! I really don't know how he has stayed in business.

 

[Carultch]

If the engineer drew it out and stamped it it’s required.
Doesn’t matter what the NEC states as long as it meet the minimums, or is backed up with his stamp, depending on the article.

Unless you can submit an RFI and have the engineer to approve your alternative. Ideally, the engineer would provide you with a little understanding of the technical reason why it is specified to go above and beyond the NEC requirements, besides "because I said so" or "because we've always done it this way". Such as knowing the soil type and that it isn't conductive enough. Or if specific equipment on the service has special grounding requirements for the service. These would be good reasons for the engineer to disagree with the NEC's one-fits-all rule of "two and done".

 

[tom baker]

Its likely a boilerplate spec borrowed from somewhere else. 3/4" rods are used with longer rods, Diameter makes no difference in resistance, larger is easier to drive.