Desert homes
Federal Pacific and Zinsco panels in older desert homes
Mid-century and 1970s homes are the valley's signature housing, and many still have their original electrical panels. Here's what to know about two brands that home inspectors flag, without the scare tactics.
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Quick answer
Federal Pacific Electric (Stab-Lok) and Zinsco panels were common in homes built from the 1950s through the 1980s. The U.S. Consumer Product Safety Commission closed its investigation of FPE breakers in 1983 without a recall and without a finding on their safety. Replacement usually costs about what any panel replacement does: Fixr's national figures (January 2025) put most at $1,500 to $4,500.
Who to call: Coachella Valley Remodeling connects you with our licensed C-10 electrical / C-7 low-voltage partner contractor, who visits and gives you a written price. Free to you. Tell us about your project or call (760) 766-2218.
The Coachella Valley has an unusually old housing stock for a place that feels new. About 80% of Palm Springs homes and roughly two-thirds of Palm Desert homes were built before 1990 (Census ACS 2020–2024). Alexander post-and-beam houses, Cathedral City Cove cottages, 1960s Rancho Mirage custom homes and the first wave of country-club condos were all wired in an era when two panel brands, Federal Pacific Electric and Zinsco, were common. If your home still has its original panel, there's a fair chance it's one of them, or something just as old.
The two brands
Federal Pacific Electric (FPE), "Stab-Lok." Installed widely from the 1950s into the 1980s. The concern raised by inspectors and some engineers is that certain Stab-Lok breakers may fail to trip under overload or short-circuit conditions.
Zinsco (also sold as Sylvania-Zinsco). Common in western states, including California, from the 1950s to the 1970s. The usual concern is the connection between breaker and bus bar: inspectors report pitting, overheating and breakers that fuse to the bus so they can no longer trip (InspectAPedia summary).
What's actually known
It's worth being precise, because both brands attract a lot of alarmist marketing.
- The U.S. Consumer Product Safety Commission investigated FPE Stab-Lok breakers and closed the investigation in 1983 without a recall. Its revised statement says the closure was made without determining whether the breakers are safe (CPSC).
- Independent testing and inspector reports describe breakers that didn't trip, but many of those sources also sell replacements, so treat specific failure percentages with care.
- Zinsco has no federal recall either. The concerns come from field reports by electricians and inspectors.
What that means for you: an old panel of either brand isn't an emergency by itself, but it's a reasonable thing to have a licensed electrician inspect, especially before you add loads such as an EV charger, a new AC unit or a battery.
Signs to act on now
Whatever the brand, call your electric utility or 911, not a contractor, if you notice:
- a burning smell near the panel,
- a panel cover that is hot to the touch,
- scorch marks, melted plastic or buzzing,
- breakers that trip and won't reset, or lights that dim sharply when the AC starts.
Don't remove the panel cover yourself.
Insurance and selling the house
Some homeowners insurers ask about panel brands on applications or inspections, and some have declined or conditioned coverage for FPE or Zinsco panels. Practices vary by company and change; ask your agent. When you sell, the buyer's home inspector will almost certainly note the panel, and it can become a negotiation item. Replacing it before listing removes one line from the inspection report; see remodels that add value before selling.
What replacement involves and costs
Fixr's panel guide (January 2025) notes that replacing FPE and Zinsco panels costs about the same as other panel replacements:
| Job | Typical national range |
|---|---|
| Most panel replacements and upgrades | $1,500 to $4,500 |
| 100 A to 200 A upgrade, panel stays put | about $3,000 typical |
| Permit | $50 to a few hundred dollars |
In older valley homes the panel swap is often the easy part. Expect the electrician to look at:
- Grounding and bonding, which may not meet today's code.
- Service size. Many 1950s-70s homes have 100 A service or less. If you're replacing the panel anyway, it's the time to decide whether 200 A makes sense. See panel upgrade costs.
- Exterior walls. Panels set in stucco or block need patching; post-and-beam houses with flat roofs and little attic space make new circuit runs harder.
- Historic review. In Palm Springs historic districts and Class 1 sites, exterior changes may need Historic Site Preservation Board review; a panel on a street-facing wall can trigger it. Ask the city.
The utility (SCE in Palm Springs, Cathedral City, Rancho Mirage, Palm Desert and Desert Hot Springs; IID in Indio, La Quinta, Indian Wells, Bermuda Dunes, Thousand Palms and Coachella) disconnects and reconnects the service, and a permit and inspection are required.
Other old-panel situations
FPE and Zinsco get the attention, but they aren't the only panels worth a look in an older house:
- Fuse boxes in some 1950s cottages, sometimes still feeding part of the house after a later panel was added.
- Split-bus panels with no single main breaker, where shutting off the house takes several throws.
- Panels from other discontinued brands, or with mismatched replacement breakers that don't belong to the panel's listing.
- Overloaded subpanels added for a pool, a casita or a 1990s addition.
- Corrosion in exterior panels on west- and south-facing walls that bake all summer.
A licensed electrician can tell you which of these applies, and whether it's a repair or a replacement.
Aluminum branch wiring
Some homes built from roughly the mid-1960s to the mid-1970s used aluminum wire for branch circuits. The issue is at connections: outlets, switches and splices can overheat. The CPSC's publication Repairing Aluminum Wiring describes the problem and the repair methods it considers acceptable. If your house is from that era, ask the electrician to check while the panel is open; it's cheaper to find it once.
Questions to ask the electrician
- What brand and amperage is my panel, and what condition is it in? Will you put that in writing?
- Do you recommend replacement now, and why?
- Does the price include the permit, the utility disconnect and reconnect, and the inspection?
- Will you check grounding, bonding and aluminum branch wiring?
- What could change the price once the old panel is out, and how is a change approved?
- What's your CSLB license number and classification? Panel work is C-10. See C-10 and C-7 licenses explained.
How the referral works
We connect you, free, with the right licensed contractor. Panel inspections and replacements go to our licensed C-10 electrical / C-7 low-voltage partner contractor, separate from our remodeling partner, and require the condition notes, permit and price in writing. You hire and pay the contractor directly. Planning a mid-century kitchen at the same time? See mid-century modern kitchens in Palm Springs.
Common questions
How do I know if I have a Federal Pacific or Zinsco panel?
Look at the label inside the panel door. Federal Pacific panels often say Federal Pacific Electric or FPE, and the breakers are marked Stab-Lok. Zinsco panels may also carry the Sylvania name, and the breakers are often multicolored. Don't remove the cover yourself; a licensed electrician or home inspector can confirm it.
Were Federal Pacific panels recalled?
No. The CPSC closed its investigation of FPE Stab-Lok breakers in 1983 without a recall, and later clarified that it made no determination either way about their safety. Many electricians and inspectors still recommend replacement because of reported failures to trip.
Do I have to replace a Zinsco or FPE panel?
No law requires it in an existing home. Some insurers ask about panel brands, and buyers' inspectors usually flag them, which can come up in a sale. A licensed C-10 electrician can inspect the panel and tell you its condition in writing.
How much does it cost to replace an old panel?
Fixr's national figures (January 2025) say replacing these older panels costs about the same as other panel replacements: most panel jobs run $1,500 to $4,500, and a 100 A to 200 A upgrade is about $3,000 typical. Extra work found behind the panel adds to it.
What about aluminum wiring?
Some homes built in the mid-1960s to mid-1970s have aluminum branch-circuit wiring. The CPSC's publication on it explains the connection problems and the repair methods it considers acceptable. Ask the electrician to check for it while the panel is open.
Can you send someone to look at my panel?
We connect you, free, with our licensed C-10 electrical / C-7 low-voltage partner contractor for the inspection and any replacement. You hire and pay it directly.
Last reviewed . Prices and rules change; confirm details with your contractor and your city or county building department.