Type 3 SPDs, PDUs, and UPS Chassis do require bonding to the Operator Position SBB.

• A. True
• B. False
• C. Only SPDs
• D. Only PDUs

Answer: (A)

Equipotential bonding at the operator position is used to keep all metal parts at the same electrical potential, providing a safe path for fault and surge currents. Type 3 SPDs, PDUs, and UPS chassis all have conductive enclosures that can carry voltage during faults or surges, so bonding them to the Operator Position SBB ensures a low-impedance connection to the protective earth. This maintains a stable reference for surge energy, reduces touch voltage for personnel, and helps the protection devices do their job effectively. Therefore, bonding these components to the Operator Position SBB is required, keeping the equipment at a single potential and enhancing overall safety.