Voltage gradient

[Becker Electric]

I’ve been trying to find the video of Mike holt explaining how voltage gradient increases in earth as you move away from an energized ground rod. (Something to do with how the ground rod makes less contact with earth and as it goes deeper into earth the resistance increases)
I can’t find it but here is a picture of what I’m talking about.

Can anyone explain to me why the voltage in the gradient does not decrease as you get farther from the source or if you know what the video is called that I’m looking for?

 

[LarryFine]

Because you're measuring the voltage relative to the pole, not the source grounded conductor. The voltage at the base of the pole would roughly match the pole.

Remember what two points you're measuring between. It's not always the theoretical zero volts represented by the service neutral and/or the planet.

If you were measuring the voltage between the dirt and the house's neutral/ground point, the voltage would drop as you move away as you're expecting.

 

[Becker Electric]

Ah I see.That makes sense. Thank you.