Federal Pacific & Zinsco Panels: Safety Guide

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Why these panels are considered dangerous and what you should do

What are Federal Pacific and Zinsco panels?

Federal Pacific Electric (FPE) and Zinsco are brands of electrical panels that were commonly installed in homes built from the 1950s through the 1980s. Federal Pacific's Stab-Lok breakers and Zinsco's panels with aluminum bus bars have documented safety issues that have been the subject of investigations, lawsuits, and widespread concern in the electrical industry.

What's wrong with these panels?

Federal Pacific Stab-Lok breakers have been shown in independent testing to fail to trip during overloads and short circuits at a significantly higher rate than other breakers. When a breaker doesn't trip, the circuit continues carrying dangerous levels of current, which can cause wires to overheat and start fires. Zinsco panels suffer from a different issue: the aluminum bus bars and breaker connections can degrade over time, causing poor contact, overheating, and in some cases, breakers that are welded in place and cannot be turned off.

How to identify these panels

Federal Pacific panels typically have the name 'Federal Pacific Electric' or 'FPE' on the panel door, with 'Stab-Lok' printed on the breakers. They often have a distinctive red stripe on the breaker handles. Zinsco panels say 'Zinsco' on the label (some were later rebranded as 'GTE-Sylvania' or 'Sylvania'). Zinsco breakers often have colored handles (green, blue, red, tan). If you're unsure, a licensed electrician can identify the panel brand during an inspection.

What should you do?

If you have a Federal Pacific or Zinsco panel, the most widely recommended course of action is replacement with a modern panel from a reputable manufacturer (Square D, Siemens, Eaton). While not every FPE or Zinsco panel will fail, the documented failure rates are high enough that most electrical professionals and home inspectors recommend replacement regardless of the panel's apparent condition. A panel replacement typically costs $2,000-$4,500 and provides decades of reliable, safe electrical distribution.

Insurance and home sale implications

Many home insurance companies in Utah either refuse to insure homes with Federal Pacific or Zinsco panels, or charge significantly higher premiums. During real estate transactions, home inspectors routinely flag these panels, and buyers may request replacement as a condition of sale. Addressing the panel proactively avoids these complications and, most importantly, reduces the fire risk in your home.

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