For Operator Position SBB bonding, which gauge is specified for runs under 13 feet?

• A. 8 AWG
• B. 10 AWG
• C. 6 AWG
• D. 4 AWG

Answer: (C)

Bonding conductors are sized to keep a low-impedance path so all metal parts at the operator position and the SBB stay at nearly the same electrical potential, even during faults. For the operator position SBB bonding, when the run is short (under 13 feet), the guideline specifies 6 AWG. This size provides enough cross-sectional area to carry potential fault current and keeps impedance low over a short distance, ensuring the bond remains solid and the voltage difference between bonded surfaces stays minimal during faults or surge events. Using smaller gauges would raise impedance and risk losing the bond under fault conditions, while a larger conductor like 4 AWG would be more than necessary for such a short run, adding unnecessary weight and cost.