 Circuit Breaker: Automatically trip to stop the flow of electricity when an overload or short circuit occurs. They can be reset after tripping and serve as both swithch and overcurrent protection device. Most of residencial breaker types are:
 Low Voltage Circuit Breakers: Used in residential, commercial, and small industrial applications (below 1,000 volt).
Arc Fault Circuit Interrupter (AFCI): Detects and interrupts arc faults that could cause fires. Focuses on ground faults and is mainly for shock protection. The NEC requires AFCI protection for most circuits in residential homes, particularly in areas like bedrooms, living rooms, hallways, and other living spaces.
Ground Fault Circuit Interrupter (GFCI): Protects against electrical shocks by detecting leakage currents. Required in bathrooms, kitchens, garages, outdoor outlets, and other wet areas. Prevents electric shocks by detecting ground faults and interrupting the power supply. Protect people from electric shock.
Fuse Contain a metal filament that melts when excessive current flows, breaking the circuit. They must be replaced after blowing. Fuses may be plug or cartridge type.
Cartridge fuse: They may be either ferrule or knife-blade. Used in industrial settings, home appliances, cars, and electrical panels.
Plug fuse: They screw into a base. Found in older household fuse boxes, mainly in North America and the UK.
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