Why Zinsco and Federal Pacific Electrical Panels Are a Major Risk in Multifamily Properties
Slavek Pelka • February 25, 2026

Why Zinsco and Federal Pacific Electrical Panels Are a Major Risk in Multifamily Properties

Older electrical panels are often found in apartment buildings and other multifamily projects where renovations may have been inconsistent over the years. Some models come with serious performance issues that can leave buildings unprotected. Here’s why you may need a Federal Pacific Electrical or Zinsco panel replacement in Illinois.


Breakers Not Working When Needed Most

Circuit breakers stop the flow of electricity when the current exceeds safe limits or suddenly spikes. They must trip quickly enough to stop components like wiring from overheating and posing a fire hazard. If that protection isn’t reliable, then the risk of a panel breaking down only grows over time.


Older panels may not have the same reliability as modern versions. This means they might not trip when needed, and it’s not always possible to tell if a panel is faulty just by looking at it. Hidden defects can mean that an emergency is only a matter of time.


Known Issues With Zinsco Panels

Zinsco panels are well-known for having issues at the breaker and bus interface. The connection loosens over time, which increases resistance and causes arcing. Localized heating poses a fire risk and can even bond the breaker to the bus and prevent tripping.


This problem can develop unseen, with the panel looking just fine on the outside. Multifamily properties with significant current loads accelerate the issue. Properties that haven’t had consistent maintenance over the years may be at a further increased risk of having a faulty panel.


Federal Pacific Electrical Panel Risks

There are longstanding concerns around the reliability of Federal Pacific panels in Illinois. When a fault occurs, breakers have been known not to trip. It’s common for inspections and insurance reviews to call out these panels as high-risk equipment and recommend replacement with a more reliable model.


Failing to interrupt a fault can lead to serious consequences, not just affecting that specific circuit. Conductors, terminations, and even distribution equipment serving multiple units can quickly heat up. This can take out power for the entire property and require emergency repairs, or lead to a serious fire that puts tenants at risk.


Federal Pacific and Zinsco Panel Replacement in Illinois

If your multifamily property has an outdated panel of any kind, consider replacing it as soon as possible. Federal Pacific and Zinsco Panel replacement in Illinois prevents known risks, improving safety and reducing liability.


At Klees Electric Inc, we work only with licensed, insured, and bonded technicians to deliver quality work you can trust in Chicagoland and the Northwest Suburbs. Get your estimate on panel replacement from us today.

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