What is the function of main bonding jumpers and system bonding jumpers in a grounded system?

The function of main bonding jumpers and system bonding jumpers is primarily to ensure a valid ground connection and maintain system integrity. These jumpers play a critical role in electrical systems by establishing a continuous path for electrical current to flow in the event of a fault.

Main bonding jumpers connect the neutral conductor to the grounding system at the service equipment, providing a low-resistance path that helps to clear faults by allowing overcurrent devices, such as circuit breakers, to operate correctly. This connection is essential for stabilizing the system voltage to ground and ensuring that all electrical equipment operates safely and effectively.

System bonding jumpers, on the other hand, facilitate the bonding of different systems or components within an installation, such as connecting separate grounding electrodes or ensuring that multiple grounding points are at the same electrical potential. This bonding helps prevent dangerous voltage differences that can lead to electrical shock or fire hazards.

By ensuring these appropriate connections are made, the integrity of the grounding system is maintained, which is crucial for the safety of both people and equipment. This functionality not only protects against electrical faults but also enhances the reliability of electrical systems overall.