What should be labeled on Fail Safe Isolators in case of a loss of galvanic isolation?

Labeling Fail Safe Isolators with a warning about "Possible loss of galvanic isolation due to a lightning strike" is important because it directly addresses a specific and significant risk associated with electrical systems, particularly in marine environments. Galvanic isolators are designed to prevent corrosion by allowing certain currents to pass while blocking others. However, they can be compromised by extreme events, such as lightning strikes, which can create surges in the system that may breach the isolation barrier.

By clearly labeling this potential issue, boat operators and technicians can be promptly made aware of the consequences of such an electrical event. This labeling serves as a proactive measure to ensure that anyone interacting with the system is cautious about the integrity of the isolator and understands that a lightning strike could jeopardize its function, potentially exposing them to stray currents and increasing the risk of corrosion or electrical shock.

The other options, while they may indicate concerns regarding the electrical system, do not specifically highlight the direct cause of galvanic isolation failure as effectively as the warning about lightning strikes. Thus, it's essential to provide precise information relevant to the safety and operational effectiveness of marine electrical systems.