Why older panels become a concern
Known problem brands
Some panels, including certain Federal Pacific Stab-Lok and Zinsco models, have long been flagged for breakers that may not trip reliably.
Fuse boxes
Fuse panels are often undersized for modern homes and prone to being over-fused with the wrong size fuse.
Limited capacity
60- and 100-amp services may not support modern HVAC, kitchens and EV chargers.
Wear and corrosion
Moisture, heat and years of use loosen connections and corrode parts.
No room to expand
Full panels lead to tandem breakers and makeshift add-ons.
What you can safely check
You can gather useful information without opening anything. Never remove the panel's inner cover.
- Brand and model on the panel label
- Main breaker or fuse size
- Rust, water stains or scorch marks on the cover
- Whether breakers feel loose when switched
- Double-tapped or unlabeled circuits (visible only if already documented)
Warning signs that need a professional
- Burning smell or heat at the panel
- Breakers that won't stay on or feel loose
- Insurance or inspection flagged the panel
- Frequent tripping
- Fuses that blow regularly
When should you call an electrician?
Have an electrician evaluate an older panel before a home purchase, before adding major loads, or if an inspector or insurer has flagged it. They'll tell you whether it can be repaired, needs a like-for-like replacement, or should be upgraded to more capacity.
Learn more about panel replacement and panel upgrades.
Services that fix this problem
Electrical Panel Replacement
Replacing outdated, damaged or problem-brand breaker panels and fuse boxes with a new, properly sized panel.
Electrical Panel Upgrade
Increasing your home's electrical capacity — typically 100A to 200A — for EV chargers, heat pumps, additions and modern loads.
Electrical Inspection
Whole-home electrical safety inspections for older homes, home purchases, renovations and insurance questions.
Electrical Panel Services
Repairs, inspections and maintenance for breaker panels — loose connections, damaged breakers, labeling and capacity checks.
Related electrical problems
Frequently asked questions
There's no single age. Condition, brand, capacity and signs of wear matter more. Many panels several decades old are evaluated for replacement.
Certain Federal Pacific Stab-Lok panels are widely flagged by inspectors due to concerns about breaker reliability. An electrician can identify your panel and explain your options.
Some insurers ask about panel type and age, and fuse boxes or flagged brands can affect coverage. Check with your insurer.