Which of the following describes the main purpose of bonding in electrical systems?

The main purpose of bonding in electrical systems is to establish a common electrical potential. This process effectively reduces the differences in voltage that might exist between various conductive parts, which could lead to potential shock hazards or electrical arcing. When bonding is properly implemented, it ensures that all metal parts that are not intended to carry current are at the same electrical potential, thereby increasing safety. This preventative measure helps safeguard equipment and personnel from electrical faults, enhancing the reliability of the electrical system.

In contrast, while ensuring the efficiency of circuit operation, protecting against electromagnetic interference, and enhancing system capacity are important aspects of electrical systems, they do not directly encompass the primary function of bonding. The essence of bonding is focused on achieving safety and consistency in electrical potential rather than improving performance or interference resistance.