Where not subject to physical abuse, the smallest permitted GEC to the ground rod from Panel LC is ___ AWG.

Where not subject to physical abuse, the smallest permitted GEC to the ground rod from Panel LC is ___ AWG.

• A. 1/0
• B. 3
• C. 2
• D. 6

Answer: (D)

The concept being tested is how the grounding electrode conductor (GEC) to a grounding electrode (ground rod) is sized when it’s not subject to physical damage. NEC rules allow a minimum GEC size of 6 AWG copper in that scenario, ensuring a sturdy, low-impedance path to Earth without requiring larger conductors. In other words, you can use 6 AWG or larger, but smaller than 6 AWG would not meet the minimum. So the smallest permitted size is 6 AWG copper. If the conductor were exposed to physical damage, a larger size would be required.

The concept being tested is how the grounding electrode conductor (GEC) to a grounding electrode (ground rod) is sized when it’s not subject to physical damage. NEC rules allow a minimum GEC size of 6 AWG copper in that scenario, ensuring a sturdy, low-impedance path to Earth without requiring larger conductors. In other words, you can use 6 AWG or larger, but smaller than 6 AWG would not meet the minimum. So the smallest permitted size is 6 AWG copper. If the conductor were exposed to physical damage, a larger size would be required.