What should the grounding electrode conductor be sized in accordance with?

The size of the grounding electrode conductor must be determined in accordance with Article 250.66. This section outlines the requirements for sizing grounding conductors based on the size of the service-entrance conductors, ensuring that the grounding system is adequate to handle potential fault currents. Proper sizing is critical for safety, as it helps to ensure that the grounding electrode can effectively channel electrical faults to the earth, reducing the risk of electric shock or fire.

Understanding the relationship between the size of the grounding electrode conductor and the service conductors is essential for installing a safe and reliable grounding system. Following the guidelines in Article 250.66 allows electrical professionals to make informed decisions about the specifications for grounding conductors, ultimately enhancing the safety and performance of electrical installations.