1. Standard Duplex Outlet
- Found in bedrooms, living rooms
- Two plug-in spots
- No test/reset buttons

2. GFCI (Ground Fault Circuit Interrupter)
- Kitchens, bathrooms, garages, outdoors
- Has TEST / RESET buttons
- Protects against shock near water

3. Tamper-Resistant (TR)
- Required in most homes now
- Spring-loaded shutters (kids can’t stick things in)
- Looks normal, feels stiffer

4. AFCI (Arc Fault)
- Usually breaker-based, sometimes outlet-based
- Protects against arc fires
- Common in bedrooms
