Can the neutral conductor of solidly grounded medium-voltage systems be bare when installed as an overhead conductor?

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In solidly grounded medium-voltage systems, the neutral conductor can be bare when installed as an overhead conductor. This is primarily due to safety considerations and the way overhead lines are constructed and used. Bare conductors in overhead installations are typically not subjected to the same risks as those in underground installations, as they can be adequately insulated from contact with other structures and vegetation.

Overhead neutral conductors can often be bare because they are typically positioned high enough to avoid contact with people and equipment under normal circumstances. Additionally, having a bare neutral conductor can be advantageous for maintaining the system's grounding and reducing electrical interference.

Conversely, installing a bare neutral conductor underground is generally not permitted, as it poses a significant risk of electrical faults and safety hazards. Underground installations require additional protective measures, such as insulation, to prevent accidental contact and ensure the safety of anyone who might encounter the conductor.

Thus, the correct answer reflects the regulations and safety practices regarding the installation of neutral conductors in different environments, specifically supporting the use of bare conductors overhead while imposing restrictions in underground settings.

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