🔍 Key Concepts

• Protection of electrical circuits vs. simple switching or conductor size • Purpose of overcurrent protection devices in generator systems • Difference between mechanical engine controls and electrical overload protection

💭 Think About

• Which device is specifically designed to stop current flow when it becomes too high for the circuit? • Does making the wire heavier actually limit current, or does it just let more current flow without damage to the wire? • What does a governor on an engine control—electrical current, engine speed, or mechanical power output?

✅ Before You Answer

• Identify which option is an actual overcurrent protective device as used in marine electrical systems • Eliminate any choice that only turns power on and off but does not sense overload • Confirm that the correct protection must automatically interrupt the circuit when current exceeds a safe value