Bonding Jumpers are typically what gauge and maximum length?

• A. #6 AWG typically 18" or less
• B. #8 AWG typically 24" or less
• C. #4 AWG typically 12" or less
• D. #10 AWG typically 6" or less

Answer: (A)

Bonding jumpers are meant to create a solid, low-impedance path between metal components so all equipment stays at the same electrical potential and can carry fault current if needed. Using a thicker conductor reduces resistance, helping the bond remain effective, while keeping the jumper short minimizes impedance and inductance in the bonding path. In typical practice, a #6 AWG copper jumper is used for these internal bonds, with a maximum length of about 18 inches. This pairing provides enough current-carrying capacity and the lowest practical impedance to maintain a reliable bond between equipment and grounding paths. Using a smaller gauge or a longer jumper would raise resistance or inductance, weakening the bond and potentially allowing voltage differences during faults or EMI. Therefore, #6 AWG and 18 inches or less best fits standard bonding jumper requirements.