The galvanic isolator must be connected in series with what component of the shore power cable?

The correct connection for a galvanic isolator is in series with the AC grounding conductor. The purpose of a galvanic isolator is to prevent corrosion caused by stray currents in a marine environment. By being placed in series with the grounding conductor, it allows safe disconnection of the vessel's bonding system from the shore power system, which effectively mitigates the risk of galvanic corrosion.

When the galvanic isolator is installed on the AC grounding conductor, it blocks any stray currents that could flow back from the shore supply to the boat, thereby protecting the underwater metals of the vessel from accelerated corrosion. It's crucial for maintaining the integrity of the boat's hull and other critical metallic components.

The other components mentioned—main power line, neutral wire, and DC grounding conductor—are not suitable for connection with the galvanic isolator for this purpose. Connecting it to the main power line would defeat the isolator's purpose and expose the vessel to potential corrosive currents. Connecting it to the neutral wire does not provide the protective benefits intended, as the neutral is part of the return path for the AC system, not for grounding protection. The DC grounding conductor serves a different function and is unrelated to the AC system's grounding protection provided by the galvanic isol