3 ms·
Why do the US regulations specify the method and not the result? That seems bizarre. Here in the UK, most earth connections are provided by the power company,
by alextingle 7y ago
Why do the US regulations specify the method and not the result? That seems bizarre.
Here in the UK, most earth connections are provided by the power company, but in rural areas you may be too far from the substation, so a ground rod is permitted - as long as it provides an earth loop impedance (Z) of less than 200 Ohm.
So if you want to provide your own earth, you have to keep driving ground rods deeper, or adding new ones until the "Zeds" are good enough.
It looks like the US regulations permit you to bang an "8 foot" rod into dry sand, and walk away as though that's job done??