What Is an Electrical Panel
The electrical panel (breaker box) is the central distribution point for electricity in your home. Power enters from the utility, passes through the meter, enters the panel, and is distributed to individual circuits (each protected by a circuit breaker). It is typically located in the garage, basement, or utility room.
Panel Sizes
60 amp: Outdated. Common in homes built before 1960. Insufficient for modern electrical needs. Upgrade required.
100 amp: Minimum for modern homes. Adequate for small homes (under 1,500 sq ft) without heavy electrical loads.
150 amp: Good for medium homes. Handles most appliances and moderate electrical loads.
200 amp: The current standard for new construction and most upgrades. Handles all standard appliances, EV charger, and moderate workshop loads.
320-400 amp: For large homes with heavy loads (multiple HVAC zones, pool, hot tub, EV charger, workshop, and electric cooking/heating).
When to Upgrade
Safety concerns: Federal Pacific or Zinsco panels (known fire hazards, must be replaced). Fuse box (pre-breaker technology). Burned or melted wires. Tripping breakers frequently.
Capacity needs: Adding an EV charger (40-60 amps). Adding central AC (30-60 amps). Kitchen remodel (additional circuits). Home addition. Hot tub or pool (30-60 amps). Converting from gas to electric appliances.
Insurance/sale: Some insurers require panel upgrades. Home inspectors flag outdated panels. Buyers may require panel upgrade before closing.
Dangerous Panels
Federal Pacific (FPE/Stab-Lok): Manufactured 1950s-1980s. Breakers fail to trip during overloads. Estimated to cause thousands of fires annually. Replace immediately.
Zinsco/GTE-Sylvania: Breakers melt to the bus bar. Do not trip properly. Replace immediately.
Fuse boxes: Pre-circuit-breaker technology. Not inherently dangerous but limited capacity, no GFCI/AFCI protection, and insurance issues. Upgrade recommended.
Split-bus panels: Have two main sections with no single main breaker. Can be safe but are limited and outdated. Upgrade when adding capacity.
Costs
Panel replacement (same amperage): 100 amp to 100 amp: $1,000-$2,000. 200 amp to 200 amp: $1,500-$2,500.
Panel upgrade: 100 amp to 200 amp: $1,500-$3,000. 60 amp to 200 amp: $2,000-$4,000 (may require new service entrance). Fuse box to breaker panel: $1,500-$3,000.
Additional costs: New meter base: $300-$800. Service entrance cable: $500-$1,500. Permit and inspection: $100-$500. Utility coordination (temporary disconnect): $0-$200.
Total project (panel upgrade + service entrance): $2,500-$5,000 average.
Individual circuits: Add a new circuit: $150-$300. GFCI breaker: $40-$80. AFCI breaker: $30-$50. EV charger circuit (240V, 50A): $500-$1,500.