Which section of Article 250 requires bonding of electrodes present at a building or structure served?

Section 250.50 of the National Electrical Code (NEC) specifically addresses the requirement for the bonding of electrodes that are present at a building or structure. This section outlines the need to connect metal underground water pipes, building steel, and any other conductive materials to the grounding system to enhance the overall grounding effectiveness of the installation. The bonding process ensures that all conductive parts are at the same electrical potential, reducing the risk of electric shock and improving the reliability of the grounding system.

In detail, Section 250.50 mandates that various types of electrodes—including ground rods and properly installed metal structures—must be bonded together to create a unified grounding network. This requirement is crucial for the safety and functionality of electrical systems, especially in preventing hazardous voltage differences that could occur if these elements are left unbonded.