Is the size of a DC system bonding jumper required to be less than the system grounding electrode conductor?

In a DC system, the bonding jumper is not required to be less than the system grounding electrode conductor (GEC). The bonding jumper's primary purpose is to ensure that ground faults do not pose a hazard by maintaining continuity and providing an effective path for fault currents.

The size of the bonding jumper typically depends on factors such as the size of the largest overcurrent device and the conductive materials used in the system, but it does not have to be smaller than the GEC. The grounding electrode conductor is specifically sized based on the system it serves and the requirements outlined in relevant electrical codes.

This understanding reflects common requirements in electrical systems where the proper sizing and connections are crucial for safety and operational efficiency, highlighting that there's flexibility, provided the bonding jumper is adequate to fulfill its function.