To interconnect equipment grounding terminals across panelboards serving the same patient care vicinity, the copper conductor must be at least which gauge?

To interconnect equipment grounding terminals across panelboards serving the same patient care vicinity, the copper conductor must be at least which gauge?

• A. 10 AWG
• B. 8 AWG
• C. 12 AWG
• D. 14 AWG

Answer: (A)

In a patient care area, you need a solid, low-impedance path that ties all equipment grounding terminals across panelboards together. That interconnecting bonding conductor must be copper and have a minimum size of 10 AWG. This size provides enough cross-sectional area to carry fault current back to the source quickly so the overcurrent devices trip promptly, while still being practical for typical healthcare installations. Smaller sizes (like 12 or 14 AWG) would not meet the required fault-path capability, whereas 8 AWG is larger than the minimum but not required unless the specific fault-current calculations call for it.

In a patient care area, you need a solid, low-impedance path that ties all equipment grounding terminals across panelboards together. That interconnecting bonding conductor must be copper and have a minimum size of 10 AWG. This size provides enough cross-sectional area to carry fault current back to the source quickly so the overcurrent devices trip promptly, while still being practical for typical healthcare installations. Smaller sizes (like 12 or 14 AWG) would not meet the required fault-path capability, whereas 8 AWG is larger than the minimum but not required unless the specific fault-current calculations call for it.