Your Electrical Panel Is the Heart of Your Home
Your service panel distributes electricity to every outlet, light, and appliance. If it's undersized, outdated, or dangerous, your entire home is at risk. A modern 200A panel is essential for homes with air conditioning, heat, and modern conveniences like EV chargers and whole-home generators.
Many homes in Plano, Frisco, and the DFW area still have 100A panels from the 1970s–1980s. These are inadequate. Some have notoriously unreliable Federal Pacific or Zinsco panels that fail to protect against overloads and create fire hazards.
Upgrading your panel is not optional if you're adding new loads—it's a safety requirement. A proper upgrade brings your home to current code, adds capacity for future tech, and gives you peace of mind.
When You Need a Panel Upgrade
Installing Major New Loads
Adding a whole-home generator (24 kW), Level 2 EV charger (40–60A), air conditioning upgrade, or electric heat requires available breaker capacity. A 100A panel typically has only 20–24 single-pole breaker slots, many already occupied. A 200A panel offers 40+ slots for growth.
Constant Breaker Tripping
If breakers trip when you run the AC and dryer simultaneously, or during power-hungry tasks, your panel is undersized. The system is protecting itself from overload. Upgrade to a larger panel instead of chasing nuisance trips.
Dangerous or Obsolete Panel Brands
Federal Pacific Electric (FPE) panels have a documented 25–30% breaker failure rate. Breakers often fail to trip during overloads, allowing dangerous current flow. Zinsco panels have similar issues. These panels are not safe and are red flags for insurance and home sales.
Panel Age Over 30 Years
Panels older than 30 years have degraded insulation and components. The main breaker may be stuck or unreliable. Replacing an aging panel is preventive maintenance before failure happens.
Home Renovation or Expansion
Adding a room, finishing a basement, or renovating a kitchen often requires new circuits. If your panel is full, you must upgrade to accommodate new wiring.
Home Sale or Refinance Requirements
Inspectors or lenders sometimes require panel upgrades before closing. If an unsafe panel is identified, replacement may be a condition of sale or refinance.
100A vs. 200A Service: What's the Difference?
| Spec | 100A Service | 200A Service |
|---|---|---|
| Max Power | 12,000 watts | 24,000 watts |
| Wire Size | 2 or 3 AWG aluminum | 2/0 or 3/0 AWG copper |
| Breaker Slots | 20–24 single-pole | 40+ single-pole |
| Typical Home Era | 1950s–1980s | 1990s–present |
| AC + Heat + Modern Loads | Insufficient | Adequate |
| EV Charger Possible? | Rare, risky | Yes, safe margin |
| Future Expansion? | Limited | Room for growth |
Bottom line: 100A panels are bottlenecks for modern homes. 200A is the new standard and what all building codes recommend. If you have 100A and want to add any significant load (AC, generator, EV charger), upgrade to 200A.
Panel Upgrade Process: What to Expect
Step 1: Electrical Survey
We inspect your current panel, note breaker configuration, identify any dangerous conditions (corrosion, loose connections, improper breakers), and photograph everything. We also assess your home's electrical demands—appliance list, heating type, usage patterns.
Step 2: Design & Load Calculation
Using NEC 230.79 requirements, we calculate your home's total demand load. We determine what your new panel capacity should be and design a new breaker configuration. We may recommend sub-panels for distant circuits (garage, detached structures).
Step 3: Permit Application
We submit electrical permits to Collin County or Denton County with detailed plans and calculations. Permitting typically takes 1–2 weeks. We handle all paperwork; you just approve the cost.
Step 4: Utility Coordination
We contact Oncor Electric (the local utility) to schedule power disconnect and reconnect. This is usually free. They'll cut power to your home during the upgrade (typically 2–4 hours). We notify you of the exact date and time.
Step 5: Old Panel Disconnection
Once power is cut, we disconnect all breakers, remove the old main disconnect, and label every wire carefully. Nothing is touched until Oncor confirms power is off. Safety is absolute.
Step 6: New Panel Installation
We install the new service entrance (meter base if needed), run new service wire to the main breaker, install the new panel in the old location, and reconnect all existing circuits to new breakers. This is the bulk of the work and takes several hours.
Step 7: Grounding & Bonding
Per NEC 250, we install or upgrade the grounding rod (minimum 8 feet into earth), bonding straps, and grounding conductors. Proper grounding prevents electrical shock and allows fault current to flow safely.
Step 8: Power Restoration
Once all connections are made and verified, we call Oncor to reconnect power. They check the meter and restore service. A final visual inspection confirms all breakers are properly labeled and the panel is ready.
Step 9: County Inspection
The county electrical inspector schedules a final inspection (typically within 1 week). They verify breaker sizing, grounding, wire types, and service entrance clearances. We ensure everything is code-compliant and you pass on the first inspection.
Panel Upgrade Cost Breakdown
| Work Type | Scope | Typical Cost |
|---|---|---|
| Individual Breaker Replacement | Replace 1–3 breakers, same panel | $150–$400 |
| 100A to 200A Service Upgrade | New service entrance, meter, panel, main breaker, reconnect all circuits | $1,800–$4,000 |
| 200A to 400A Service Upgrade | Large homes, new service wiring, second meter possible | $4,000–$8,000+ |
| Sub-Panel Installation | Dedicated panel for garage, workshop, or backup circuits | $800–$1,500 |
| Service Line Upgrade (Long Distance) | New conduit/wire from transformer to meter (100+ ft) | +$1,000–$3,000 |
What's Always Included
- Electrical permits: Applied, coordinated, inspected
- Utility disconnection/reconnection: Coordinated with Oncor
- New panel and breakers: Code-rated, properly labeled
- Grounding and bonding: NEC 250 compliant
- Wire sizing: Proper gauges for each circuit
- Final inspection: Coordinated with county
A 100A-to-200A upgrade is an investment, but it's essential for modern electric demands. Proper planning, permits, and inspection ensure your panel lasts 50+ years without issues.
Safety & Electrical Codes
NEC Article 230: Service Entrance Requirements
- 230.70: Service disconnecting means must be grouped, marked, and readily accessible
- 230.79: Main service breaker sized for home calculated demand load (NEC Table 220.42)
- 230.80: Service equipment rated for the system voltage and available fault current
NEC Article 408: Panelboards
- 408.36: Breaker protection for neutral and grounding conductors
- 408.56: Minimum wire bending space and working space around panels
- 408.58: Proper labeling of circuits (every breaker must be labeled)
NEC Article 250: Grounding
All panels require proper grounding:
- 250.52: Grounding electrode installation (minimum 8 feet into earth, copper or steel)
- 250.53: Multiple electrodes bonded together
- 250.68: Grounding conductor connections properly sized and rated
Dangerous Panels (Not Code Compliant)
Federal Pacific Electric (FPE) and Zinsco panels are obsolete and no longer sold. They fail inspection, may deny insurance, and create fire hazards. If your home has one, replacement is strongly recommended.
Texas Electrical Licensing
Lone Star Electric (TX License #TECL29847) is fully licensed for panel upgrades, service entrance work, and all permitting. Your installation passes all inspections.
DFW Permitting: Collin & Denton County
Collin County (Plano, Frisco, McKinney): Electrical permits are processed through the county. Required for any service work over $500. Inspections typically occur within 5–7 business days. We coordinate the inspection appointment.
Denton County (Denton-area communities): Similar process. Permits are required for all panel work. Inspectors verify NEC compliance and safety.
Our Role: We handle permit applications, submit all required documentation, coordinate utility work, and manage inspector scheduling. You approve costs and we handle the rest.
Timeline: Permit to inspection typically takes 2–3 weeks. Power disconnect/reconnect is scheduled with the utility and takes a few hours.
Common Panel Problems We Fix
Corrosion & Water Damage
Panels in humid garages or near water sources corrode. Water inside the panel causes short circuits. We replace the panel and seal the location.
Improper Breaker Types
Sometimes unlicensed contractors install wrong breaker types (overfusing, incorrect amp rating). We identify and replace with correct breakers.
Missing Labels or Double Taps
Circuits without labels or multiple wires on one breaker (double taps) are code violations. We relabel and fix double taps.
Inadequate Grounding
Older panels may lack proper grounding rods or bonding. We upgrade grounding to NEC standards.
Ready to Modernize Your Electrical System?
We'll inspect your panel, identify any issues, recommend the right upgrade, and provide a detailed quote with timeline and permitting details. Schedule a free assessment today.
Call (469) 555-0247 for a Free Estimate