For two non-MGN systems, the grounding arrangement is.

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Multiple Choice

For two non-MGN systems, the grounding arrangement is.

Grounding a two-system setup with a neutral-to-ground bond provides a clear and reliable fault-current path and a stable reference to earth. Bonding the neutral to ground in a wye configuration ensures that any line-to-ground fault can return through a low-impedance path, allowing protective devices to trip promptly and keeping voltages referenced predictably. This is why a grounded wye arrangement is preferred when there isn’t a shared Main Grounding Network linking the systems. In contrast, a delta connection has no neutral to ground reference, and ungrounded or floating schemes intentionally avoid a direct neutral-to-ground bond. Those approaches can lead to unpredictable voltages to earth and slower or uncertain fault clearance, which is why they’re not suitable for two separate, non-MGN systems.

Grounding a two-system setup with a neutral-to-ground bond provides a clear and reliable fault-current path and a stable reference to earth. Bonding the neutral to ground in a wye configuration ensures that any line-to-ground fault can return through a low-impedance path, allowing protective devices to trip promptly and keeping voltages referenced predictably. This is why a grounded wye arrangement is preferred when there isn’t a shared Main Grounding Network linking the systems.

In contrast, a delta connection has no neutral to ground reference, and ungrounded or floating schemes intentionally avoid a direct neutral-to-ground bond. Those approaches can lead to unpredictable voltages to earth and slower or uncertain fault clearance, which is why they’re not suitable for two separate, non-MGN systems.

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