What is the maximum length for an equipment bonding jumper installed on the outside of a raceway?

The maximum length for an equipment bonding jumper installed on the outside of a raceway is indeed 6 feet. This limit is established to ensure effective electrical continuity between the equipment and the grounding system. When a bonding jumper exceeds this length, resistance may increase due to the longer distance, potentially compromising the bonding effectiveness.

The requirement also aligns with safety standards that dictate how electrical installations should minimize the risk of electrical faults and ensure proper fault current paths. Keeping the bonding jumper within this specified length helps to maintain lower impedance and facilitates reliable operation of overcurrent protective devices in the event of a fault, ensuring both the safety of the electrical system and the people using it.

Understanding and adhering to these regulations is crucial for maintaining compliance with electrical codes and promoting safety in residential wiring practices.