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Federal Pacific Stab-Lok Panel

Also called: FPE panel, Stab-Lok

⚡ Electrical — a term you may see in your inspection report.

What is a Federal Pacific Stab-Lok panel, and is it dangerous?

A Federal Pacific Electric (FPE) Stab-Lok panel is an electrical panel installed in millions of American homes from the 1950s into the early 1980s. Independent testing has found that some Stab-Lok breakers can fail to trip during an overload — meaning the breaker may not cut power when it should. A home inspector can identify the panel and report it, but cannot test whether individual breakers will trip. My report recommends evaluation by a licensed contractor, and repair or replacement if necessary. If a home you're buying has one, it belongs on your list of things to look into before closing.

Typical era
1950s to early 1980s
How I spot it
"Federal Pacific Electric" or "Stab-Lok" on the panel label; breaker toggles often have a red or orange stripe
My role
Identify, photograph, and report — not test
What I recommend
Evaluation by a licensed contractor; repair or replace if necessary

What it actually is

It's a brand of electrical panel, not a type. Federal Pacific Electric sold Stab-Lok panels for decades, and they were installed in a great many homes built during that stretch. The concern isn't the box on the wall — it's the breakers inside it, and specifically whether they do the one job a breaker exists to do.

Why it matters in East Texas

These still turn up regularly in Tyler-area homes built in the 1960s and 1970s, and in the older neighborhoods around Longview, Kilgore, and Gladewater. I don't consider finding one unusual. What I do consider unusual is a buyer who's been told about it before they get my report.

What I do when I find one

I photograph the panel label and the breaker layout, note it plainly in the report, and recommend it be evaluated by a licensed contractor and repaired or replaced if necessary. I don't test breakers — that's outside what a visual inspection can responsibly do, and a breaker that trips once on a bench doesn't tell you much about the other twenty.

What it means for you

This is not an evacuate-the-house finding. It's a known-issue finding — something to price in, ask about, and have looked at by someone licensed to do that work. It's also worth a call to your insurance agent, because some carriers ask about panel brand.

More electrical terms: Knob & Tube Wiring · Zinsco Panel · Double-Tapped Breaker · GFCI Outlet · AFCI Breaker

The interior of a Federal Pacific Stab-Lok load center with the deadfront in place, showing red-tipped breaker handles and Stab-Lok branding
This is what one looks like from the inside. “STAB-LOK LOAD CENTER” across the deadfront, “Federal Pacific Electric Company, Newark, N.J.” at the bottom, and the red-tipped breaker handles — the easiest thing for a homeowner to actually recognise.
Close view of embossed lettering reading Federal Pacific Electric Company, Newark, N. J. on an electrical panel deadfront
The maker's mark, close up. If this is printed inside your panel, you have one.
An exterior electrical disconnect enclosure on a pole with FPE embossed on the cover, weathered and rusting at the mounting pipe
It isn't always inside the house. This is an exterior disconnect on a pole — from a few feet away it's just a weathered grey box, and the only clue is the FPE embossed on the cover.
The same enclosure opened, showing a rusted Federal Pacific Stab-Lok deadfront with two double-pole breakers still installed
The same box opened: a rusted Stab-Lok deadfront, still in service. I photograph it, report it, and recommend it be evaluated by a licensed contractor and repaired or replaced if necessary. I don't test the breakers — a visual inspection can't tell you whether they'll trip when they need to.
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Questions About Something in Your Report?

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