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Thursday, April 11, 2019

Question:

How many grounding rods are required in Robeson County? Also we have a lot of pig iron In our ground. What is the best method of putting the rod in the ground?

Donna Clark
A

Answer:

Hey Donna thanks for your question. All of the electrodes described in 250.52(A)(1) through (A)(7) must be bonded together to create a grounding electrode system as stated in 250.50. If none are present something needs to be installed and if you are using only ground rods then two need to be installed as stated in 250.53(A)(2). an exception to that section allows one rod if it has a resistance to earth of 25 ohms or less. You need to check with Robeson County officials to see if they have any local requirements.

There are various ground rod installation tools available including manual drivers, adapters for demolition and rotary hammers, or the old method of using a sledge hammer. What is best is determined by how many you need to install and how much you want to spend.

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