In which type of installation is the buried bare wire between the structure and the anode protected?

In a galvanic anode installation, the buried bare wire between the structure and the anode is protected due to the nature of how these systems operate. Galvanic anodes are made of metals that are more anodic than the material of the structure they protect. When they are installed, they create an electrochemical reaction which generates a small amount of current that flows from the anode to the structure, ensuring that the structure is cathodically protected.

The bare wire connecting the anode to the structure is typically encased in a protective coating or insulation to prevent corrosion and ensure that the electrical connection remains intact over time. This protection is crucial because it maintains the integrity and effectiveness of the cathodic protection system by ensuring that the current flow is directed appropriately to prevent corrosion of the structure.

In contrast, while impressed current installations and hybrid systems involve protective coatings and methods, they do not inherently protect the bare wire in the same manner as galvanic systems since they rely on external power sources or a combination of galvanic and impressed current methods. Direct current installations do not specifically address the concept of cathodic protection in the same context and are more related to the type of electrical current used rather than the protection aspect of buried connections.