Federal Pacific and Zinsco panels — why they matter and what to do

The short version

Federal Pacific Electric (FPE) and Zinsco are two panel brands installed widely in North American homes from roughly the late 1950s through the early 1980s. Both have documented reliability problems where the breakers do not trip when they should — meaning a circuit overload or short does not shut off the power, and the wire in the wall keeps heating up. This is a house-fire risk.

WNY has a lot of these panels still in service, especially in the post-war suburbs built during that exact window. If you just learned you have one, you are not unusual — you are in the same boat as thousands of your neighbors.

The recommended answer in almost every case is replacement, not repair. Parts are no longer manufactured. The bus design has problems that cannot be corrected with drop-in replacement breakers. A licensed electrician will almost always quote a full panel replacement when one of these brands is identified.

How to know if you have one

Open the panel door and look at the manufacturer label, usually on the inside of the door.

Federal Pacific Electric (FPE) Stab-Lok

• Label may say "Federal Pacific Electric Company," "Federal Pioneer," or "Stab-Lok."
• Breakers are distinctive: the trip handle is usually red-orange or black, narrower than modern breakers, and labeled Stab-Lok.
• Panel may be labeled "FPE" with a small badge.
• Common colors: beige, gray, or red.
• Installed widely 1960s through 1980s.

Zinsco

• Label may say "Zinsco," "Sylvania-Zinsco," "GTE-Sylvania," "Kearney-Zinsco," or just "Sylvania" with Zinsco-style breakers.
• Breakers often have multiple colors — blue, green, red, black handles on the same panel.
• Panel may be labeled Zinsco or Sylvania.
• Installed roughly 1960s through early 1980s.

If you are not sure which family yours is in, take a clear photo of the inside of the panel door and of one row of breakers, and an electrician can usually identify it immediately.

Why they are flagged (without the panic)

The issue with both brands is similar: a failure mode where breakers sometimes do not trip during an overload or short. The breaker looks normal, the circuit looks normal, and the panel looks normal — but when a fault happens, the protection does not do its job.

Several independent investigations over the years confirmed the failure rate is higher than acceptable. These are not rumors or internet drama. The trade has known about these brands for decades, and the recommendation has been consistent.

A few important qualifiers:

• Most of these panels are not actively failing right now. The risk is that when a fault happens, you cannot count on the panel to protect you. So the risk shows up when it is already too late.
• Condition matters. A panel in a dry basement with no signs of arcing, melting, or damage is in a different situation than one with visible damage.
• Loading matters. A panel serving a lightly-used home with a modest load is exposed less often than one serving a heavily-loaded modern home with stacked appliances.

Replacement is the honest, conservative recommendation. It is also often the only way to get full insurance coverage and pass a home inspection without negotiation.

What replacement actually involves

A typical Federal Pacific or Zinsco replacement in a WNY home includes:

1. Utility coordination. Your electrician calls National Grid (or NYSEG or RG&E) to schedule a service disconnect for the day of the work. Power to the house is off for several hours.
2. Removing the old panel. The existing box comes off the wall, along with all breakers.
3. Installing a modern panel. A new load center (Eaton, Siemens, Square D, or similar) of the appropriate amp rating — 100A, 150A, or 200A depending on your situation.
4. Re-landing every circuit. Each branch circuit wire gets terminated in the new panel with a new breaker. This is where a lot of the labor lives.
5. Bringing work up to current code. GFCI, AFCI, and dual-function breakers where required. Grounding electrode conductor and bonding where it was missing or incorrect before.
6. Inspection. Your local AHJ inspects the work before the utility reconnects service.
7. Reconnection and testing. Utility comes back, power goes on, the electrician tests each circuit.

This is typically a one-day job for a single electrician or crew, sometimes longer with complications. The house is without power for most of a business day.

Rough cost in WNY

Cost bands for a straightforward replacement in a typical WNY home, as of early 2026:

• 100A to 100A like-for-like replacement: ~$2,500 to $4,000.
• 100A to 200A service upgrade with replacement: ~$4,000 to $7,500. Higher if the utility requires mast, meter, or weatherhead upgrades.
• Significant complications: $8,000+. Complications include finished basements where wall work is needed, underground service with conduit issues, tight service clearances, or rewiring required to bring older runs up to code.

These are rough bands, not quotes. Get three written scopes from licensed WNY electricians who have done Federal Pacific or Zinsco replacements before. Ask for references and photos of past work.

The insurance angle

Homeowners insurance is where this often gets real. Some carriers in New York will not write a policy on a home with an active Federal Pacific or Zinsco panel. Others will write it with a higher premium, an electrical-specific exclusion, or a requirement to replace within a set time window.

Practical moves:

1. Call your current carrier and ask specifically: "I have a Federal Pacific Stab-Lok panel. How does that affect my policy?"
2. If you are shopping for a new policy, expect this to come up. Keep documentation of any replacement work ready.
3. After replacement, send your carrier the inspection card and invoice. Sometimes this triggers an immediate rate reduction.
4. Home sales. Buyers' inspectors almost always flag these panels. Sellers who replace proactively often get better negotiation outcomes than sellers who try to explain it away.

Key takeaways

• - Federal Pacific Stab-Lok and Zinsco panels should be replaced, not repaired.
• - The risk is real but usually not tonight-level urgent in an undamaged panel.
• - Typical WNY replacement cost is in the $2,500 to $6,000 range for straightforward cases.
• - Insurance and real-estate transactions are often where homeowners finally pull the trigger on replacement.

Decision framework for WNY homeowners

Here is a rough way to think about prioritization if you just confirmed you have one of these panels.

Replace within 30 days if any of the following are true

• You see signs of arcing, melting, scorching, or browning on breakers or the panel box.
• You smell burning or see smoke near the panel.
• A breaker will not reset or does not trip during a known fault (an electrician can test).
• Your insurance carrier is threatening non-renewal and will accept nothing else.
• A house sale is pending and the buyer is requiring replacement.

Replace within 6 to 12 months if

• The panel has no visible damage but is in heavy use and you plan to add EV charging, heat pump, or solar.
• Your insurance is writing you with a time-limited exception.
• You are planning a major renovation that would involve the panel anyway.

Replace within 1 to 2 years if

• The panel has no visible damage, your loads are modest, and insurance is not pressing.
• You are budgeting the work alongside other upgrades and paced replacement fits better.

This is not advice for your specific situation — only a licensed electrician who has seen your panel in person can give you that. But it is how most WNY homeowners realistically plan the work.

Plan the sequencing with the panel upgrade checker

If replacement is in your future, the panel upgrade checker helps you think about service size, room for growth, and whether to pair replacement with a service upgrade.

Open Open the panel upgrade checker

One last thing: this is a known, solvable problem

A Federal Pacific or Zinsco panel is not a reason to panic, and it is not a reason to feel like your house is broken. It is a specific, well-understood issue that the trade knows how to fix, and replacement is a predictable one-day job with a clear outcome.

If you have one of these panels, your next step is to get a licensed WNY electrician to look at it, confirm the brand and condition, and give you a written scope. That single visit turns a vague worry into a plan you can pace.