What is the required enclosure for transformer stations to prevent accidental contact with energized parts?

The correct choice is to have transformer stations enclosed to prevent accidental contact with energized parts. Enclosures are crucial for safety as they effectively shield any live electrical components from unauthorized access and accidental contact by personnel or animals. This is especially important in environments where the potential for accidental electrocution exists due to the presence of high voltage.

Enclosures can be designed to withstand environmental conditions while ensuring that only qualified personnel can access the equipment inside. By ensuring that transformer stations are properly enclosed, it aligns with safety regulations and industry standards aimed at protecting workers and the public from hazards associated with electrical equipment.

Open access allows for unrestricted entry, which increases the risk of accidents. Unfenced areas similarly expose electrical components to unnecessary contact, and underground installations, while they can provide some protection, are not always practical or necessary. Therefore, ensuring that transformer stations are enclosed is the most effective way to mitigate risks associated with energized parts.