🔍 Key Concepts

• Overload protection vs short-circuit protection in basic marine electrical systems • Normal function of fuses and circuit breakers • Why using the correct conductor (wire) size is important and what it does not do

💭 Think About

• Which device is specifically designed to open the circuit automatically when current becomes too high? • Which options are mainly switching or connection devices rather than automatic protective devices? • Does making a wire smaller (undersized) protect the circuit, or does it make overheating more likely?

✅ Before You Answer

• Identify which choice provides automatic interruption of current during an overload or short circuit • Eliminate any choice that would increase fire risk instead of reducing it • Confirm that the selected device is commonly required by marine electrical safety standards for branch-circuit protection