Short answer
Federal Pacific Stab-Lok and Zinsco panels were installed in many homes from roughly the 1960s to 1980s. Both have a widely reported history of breakers that may not trip under overload, and many electricians and home inspectors recommend replacement. An electrician can evaluate your specific panel.
How to recognize them
Look at the label inside the panel door, without removing the inner cover.
- Federal Pacific: 'Federal Pacific Electric' or 'FPE', with 'Stab-Lok' on the label and breakers
- Zinsco: 'Zinsco' or 'Sylvania-Zinsco' on the label, often with colorful breaker handles
Why they are a concern
The main concern reported for both is breakers that may not trip when a circuit is overloaded or shorted, which defeats their purpose. Zinsco panels are also known for connections between breakers and the bus that can loosen and overheat. Not every panel has failed, but the track record is why many professionals recommend replacement, especially before adding major loads like an EV charger or heat pump.
Not sure it is safe to keep running? A local technician can check it today.
Call NowWhat replacement involves
A new panel, new breakers and often updated grounding and bonding. The utility usually disconnects and reconnects service, and the job needs a permit and inspection through the jurisdiction for your address. In Summerville, that can be Dorchester, Berkeley or Charleston County depending on where you live.
Related questions
Will my insurer care about an FPE or Zinsco panel?
Some insurers ask about panel brands. Check with your agent.
Can I just replace the breakers?
Replacement breakers for these panels are limited and do not address bus or connection issues. An electrician can explain your options.
How long is power off for a panel swap?
Typically most of a day, plus the inspection and utility reconnection.
Services that fix this
Electrical Panel Repair
Loose bus connections, corrosion, buzzing, overheating and panels with known problem brands.
Electrical panel repair in Summerville
Circuit Breaker Repair
Breakers that trip, will not reset, buzz or run hot. Diagnosed at the circuit, then repaired or replaced.
Circuit breaker repair in SummervilleThis guide is general information for homeowners, not a diagnosis of your system. For anything involving gas, carbon monoxide, electricity or active leaks, stop and call a qualified professional.
