inexpensive long-term stay in Sonora?
I'm thinking of going to Mexico this winter rather than the US as I'm getting dangerously close to spending enough time in the US as to have to file income tax there. :E Going to Mexico is really i...
Forum Discussion
Turtle-Toad wrote:
I'm very aware of the NEC's requirements for ground rods; the value is 25 ohms or less for a single rod or multiples of rods. As you bond additional rods together you are creating parallel circuits and OHMS Law for resistances in parallel apply. And the 25 ohms is still the goal (and I might add that the just released 2014 version didn’t change any of this). If you can’t meet the resistance requirement, you either change locations or go back to the drawing board. In Saudi we used to either drive them in the water or dump water on the rod site.I've also used the water trick in Mexico....
The power company required no higher than 10 ohms. Switchyards even lower, the FAA required no higher than 100 ohms. With retesting done annually.
If NEC requires 25 ohms with multiple rods that's news to me, But I retired in 2006.
A couple years ago our local inspector just required two rods at least 8 feet apart did not care about any stinking values.
Is that really a ground? Depends on fault current.
