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What is the difference between earth resistance and earth electrode resistance?

  Only one of the terminals is evident in the earth resistance. In order to find the second terminal, we should recourse to its definition: Earth Resistance is the resistance existing between the electrically accessible part of a buried electrode and another point of the earth, which is far away. The resistance of the electrode has the following components :

( A) The resistance of the metal and that of the connection to it. 

(B) The contact resistance of the surrounding earth to the electrode.

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