Your Breaker Panel
The breaker panel (also called the electrical panel or fuse box) is the control center for your home's electricity. Power enters from the utility company, passes through the meter, and is distributed through the panel to individual circuits. Each circuit has a breaker that trips (shuts off) if the circuit is overloaded or there is a fault.
Common Circuit Sizes
- 15 amp — most lighting and general-purpose outlets (14-gauge wire)
- 20 amp — kitchen countertop outlets, bathrooms, garages, laundry (12-gauge wire)
- 30 amp — electric dryer, central AC (10-gauge wire, 240V)
- 40-50 amp — electric range/oven, sub-panels (8-6 gauge wire, 240V)
Calculate the right wire size for your circuit.
Open Wire Size Calculator →What You Can Safely Do Yourself
- Replace a light switch (with breaker OFF and tested)
- Replace an outlet (with breaker OFF and tested)
- Replace a light fixture (with breaker OFF)
- Reset a tripped breaker
- Test GFCI outlets (press the test/reset buttons monthly)
Always Call an Electrician
- Any work in the breaker panel
- Adding new circuits
- Upgrading service (100A to 200A)
- Aluminum wiring concerns
- Frequent breaker trips with no obvious cause
- Any burning smell, sparking, or hot outlets
- Whole-house rewiring
Safety Rules
Electricity can kill. These rules are non-negotiable:
- Always turn off the breaker before touching any wiring
- Test with a voltage tester to confirm power is off — never trust the breaker label alone
- Never work in a wet area with live electricity
- Do not overload circuits with too many high-draw appliances on one circuit
- When in doubt, call a licensed electrician
The most dangerous electrical situations are the ones you cannot see: overheating wires behind walls, corroded connections, and overloaded circuits. If your lights flicker, outlets feel warm, breakers trip frequently, or you smell something burning near an outlet or switch, stop using that circuit and call an electrician immediately.