For transmission, the minimum ground size is used as which size?

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Multiple Choice

For transmission, the minimum ground size is used as which size?

Grounding conductors for transmission must provide a low-impedance path for fault currents so protective devices clear faults quickly and equipment stays safe. The minimum size typically specified for a transmission grounding conductor is the two-aught size (2/0) AWG. This size gives enough cross-sectional area to carry fault current without overheating and keeps the path impedance low enough for reliable fault clearing. Using anything smaller would not meet the minimum requirement, while larger sizes would still satisfy the need but aren’t necessary for the minimum.

Grounding conductors for transmission must provide a low-impedance path for fault currents so protective devices clear faults quickly and equipment stays safe. The minimum size typically specified for a transmission grounding conductor is the two-aught size (2/0) AWG. This size gives enough cross-sectional area to carry fault current without overheating and keeps the path impedance low enough for reliable fault clearing. Using anything smaller would not meet the minimum requirement, while larger sizes would still satisfy the need but aren’t necessary for the minimum.

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