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A comment on The 5 foot ground rod and its use in the National Electric Code (2018). Parent comment

Re:The 5 foot ground rod and its use in the National Electri... by sokoloff on Wednesday October 23, 2019 @08:53AM (#21334070)
This discussion triggered in me the question, "Obviously, I can't just stick a meter probe in the ground [as I'd be measuring the dominant resistance of that probe rather than the grounding rod in series]. So, how would I reasonably measure the resistance of an earth connection?" I came up with the (mildly hazardous) solution of putting a 120VAC line from the power company supply down the ground rod and measuring the current flow back to the PoCo (grounded) neutral conductor and then went googling.

There are a few other (safer) ways that might interest HN readers, so sharing this video: https://www.youtube.com/watch?v=Yg6G5VUSsWA

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Re:The 5 foot ground rod and its use in the National Electri... by mcguire on Wednesday October 23, 2019 @06:08PM (#21339577)
They have several hundred dollars of equipment there and have a stripped end of a piece of bell wire plugged into the 120VAC extension cord.

I love electricians (and electrical engineers).

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