What size is specified for multiple objects of above-ground external grounding conductors?

• A. #10 AWG copper jacketed
• B. #2 AWG copper jacketed
• C. #1/0 AWG copper jacketed
• D. #6 AWG copper jacketed

Answer: (B)

When several objects are tied into the same above-ground external grounding system, the path back to earth needs to carry any fault current with low impedance. A larger, copper jacketed conductor provides both the necessary current-carrying capacity and the outdoor protection (moisture, corrosion, physical wear) that these conductors face in the field. This is why, for multiple external grounding connections, the specification calls for a bigger, jacketed copper conductor rather than a smaller or unjacketed option. Among the choices given, the one that uses a larger, weatherproof copper conductor aligns with that requirement, delivering a safer, more reliable ground path for multiple objects. Smaller or unprotected options would not meet the needed robustness, while the larger end tends to exceed what's practically required for this scenario.