What is the minimum size equipment-bonding jumper required for a 30-ampere overcurrent protective device supplying a grounding-type receptacle?

The minimum size for the equipment-bonding jumper is determined by the rating of the overcurrent protective device and follows the guidelines established in the National Electrical Code (NEC). For a 30-ampere overcurrent protective device, the NEC specifies that the minimum size for copper bonding jumpers is 10 AWG. This is essential for ensuring that the bonding conductor can safely carry fault currents back to the panel and effectively clear any electrical faults, protecting both equipment and individuals from potential hazards.

Choosing an appropriately sized jumper is crucial for maintaining the integrity of the electrical system and ensuring compliance with safety standards. Using a smaller size than required could lead to overheating and inadequate fault protection. Thus, in this scenario, 10 AWG copper as the minimum size for the bonding jumper aligns with established code requirements and safety practices.