In a vehicle's electrical system, what is the main function of fuses?

Question

DentroTest · Accepted Answer

Fuses are safety and protection elements installed in the vehicle's electrical circuits (lights, air conditioning, power windows, etc.). Their fundamental purpose is to prevent an overload or excessive increase in current intensity (amperage) or a short circuit from damaging or burning the components and wiring. If the current exceeds the fuse's rated limit, its internal filament melts through the thermal effect, opening the circuit and immediately interrupting the flow of electricity. Distributing current is not the task of fuses, because electrical distribution is managed by the wiring, junction boxes and control units, not by the fuses. Preventing the current from changing direction is not their task either, because allowing current to flow in only one direction is the job of rectifier diodes.

In a vehicle's electrical system, what is the main function of fuses?

Want to pass the Permit D and D1 (English) theory test first time?