Panel Upgrades

Why Panel Upgrades Matter

Your electrical panel is your home's power distribution hub. It receives power from the utility and splits it into individual circuits for different areas. An undersized or failing panel creates safety risks and limits your home's functionality. Modern homes demand more power than ever—AC systems, electric water heaters, EV chargers, and smart home devices all compete for capacity. If your panel can't keep up, you'll face tripping breakers, inability to add circuits, or worse: dangerous overcurrent conditions that can cause fires.

Critical Signs Your Panel Needs Upgrade

Panel Amperage: 100A vs. 200A vs. 320A

NEC Article 230 & 240: Governs main service sizing. NEC requires 200A minimum for homes with central AC and electric heat.

Federal Pacific & Zinsco Panels: A Safety Hazard

These two panel brands represent a serious safety risk. Both have well-documented defects that can prevent breakers from tripping during overloads, allowing dangerous current to flow unchecked.

Federal Pacific (FPE)

• Manufactured 1950s–1980s, common in older Marietta homes
• Stab-Lok breakers frequently fail to trip, allowing overcurrent
• Risk of fire, electrical shock, and property damage
• Some insurance companies refuse coverage on homes with FPE panels
• Home inspectors flag them as major defects

Zinsco

• Manufactured 1960s–1970s, less common but equally unsafe
• Breakers can freeze in the ON position during overloads
• Bus bar corrosion leads to loose connections and arcing
• Higher fire risk than Federal Pacific
• Replacement is strongly recommended, not just repair

We recommend replacing any FPE or Zinsco panel immediately. Don't attempt repairs—the entire panel is unreliable. Replacement provides peace of mind and restores proper safety.

Aluminum Wiring Concerns

Homes built in the 1960s–1970s sometimes have aluminum branch wiring instead of copper. While code-permitted at the time, aluminum presents long-term safety issues:

• Aluminum oxidizes faster than copper, creating high-resistance connections
• Loose connections generate heat and increase fire risk
• Thermal expansion/contraction causes connections to loosen over time
• Requires special handling and anti-oxidant compound at connections

If your home has aluminum wiring, we'll discuss options during panel upgrade: rewire with copper (recommended for safety), or install CO/ALR-rated breakers and outlets designed for aluminum. Most prefer full rewiring.

Cobb County Permits & Inspection

Panel upgrades require Cobb County permits and inspection. Here's the process:

1. Load Calculation: We calculate your home's electrical load and design the new panel
2. Georgia Power Assessment: Determine if service upgrade is needed (new meter, line, etc.)
3. Permit Application: Submit plans and calculations to Cobb County Building Dept.
4. Permit Approval: Usually 5–10 business days
5. Installation: We perform the upgrade with minimal power downtime
6. Rough & Final Inspection: County inspector verifies proper installation and code compliance
7. Georgia Power Final: Utility approves and activates new service

Cost: Permits typically cost $100–$250. We handle all coordination with the county and Georgia Power.

Georgia Power Coordination

Georgia Power (the local utility) may need to be involved, depending on your upgrade scope:

• Service Line Upgrade: If upgrading from 100A to 200A, the utility line may need reinforcement or replacement
• Meter Upgrade: New meter socket required for higher amperage service
• Pole Work: May require utility pole modifications or new transformer
• Cost: Georgia Power typically absorbs these costs if you're within their upgrade range
• Timeline: Utility work adds 1–2 weeks to overall project

We coordinate all Georgia Power requirements. Let us handle the utility—we have established relationships that ensure smooth approvals.

NEC Code & Load Calculations

Panel sizing must comply with NEC Articles 230 and 240, which require load calculations based on:

• General Lighting: Calculated at 3 watts per square foot of living area
• Appliances: Nameplate ratings for electric water heater, range, dryer, HVAC
• Heating/Cooling: 100% of largest motor load (AC or heat pump compressor)
• Demand Factor: NEC Table 220.42 allows reduced load for some appliances used simultaneously
• Future Load: We recommend 25% additional capacity for future upgrades

Georgia adopted the 2023 NEC. Our load calculations ensure your panel properly handles current and future demands while staying within code limits.

Panel Upgrade Cost Breakdown

Costs vary based on amperage upgrade, existing infrastructure, and whether Georgia Power work is needed. Here's what to expect:

Note: Georgia Power may cover meter and service line costs. Final price provided after site assessment and Georgia Power evaluation.

Typical Project Timeline

What's Included in Your Upgrade

Ready to Upgrade Your Electrical Panel?

If you have a Federal Pacific panel, fuse box, or frequent breaker trips, don't wait. Electrical hazards can cause fires and injury. We'll assess your panel, provide a detailed estimate, and handle all permits and coordination.

Contact Lightning Bug Electric for a free panel assessment today.