Old Electrical Panel

If your house has an old electrical panel, the brand and type on the label matter more than its age. A handful of panel types common in older Broward homes, Federal Pacific Stab-Lok and Zinsco above all, have known problems with breakers that may not trip or connections that overheat. None of that means your panel is about to fail, but it does mean it is worth having a licensed electrician look at it, and an insurer may ask about it anyway.

How to find out what you have

You can identify most panels without touching anything live. Open the panel door, the hinged outer cover, but never remove the inner cover with the screws around its edge. Then look for:

1. The manufacturer’s name, printed on the door, on a label inside the door or on the panel’s frame.
2. The breaker style. Note the color of the breaker handles and any name molded into them.
3. Whether there are breakers at all. Screw-in fuses mean a fuse box rather than a breaker panel.
4. The position of the main breaker, if there is one. Some older panels have no single main breaker.

Take a clear photo of the label and the breakers. That photo is useful for the electrician and for your insurer.

The panels worth a closer look

Federal Pacific Electric, Stab-Lok

Federal Pacific panels were installed widely, and the Stab-Lok breakers in them have long been questioned. The concern is that some of these breakers may not trip when a circuit is overloaded or shorted, which is the one job a breaker exists to do. Some may also fit loosely on the bus bar, the metal strip that carries power to each breaker. You can usually spot them by the Federal Pacific or FPE name on the label and the word Stab-Lok on the breakers or inside the door.

Zinsco and Sylvania-Zinsco

Zinsco panels, also sold under the Sylvania name, have a different weakness. The breakers clip onto the bus bars, and over time that connection can loosen, arc and overheat. In some cases the breaker can stick to the bus bar so it no longer cuts the power when it should. Many have brightly colored breaker handles, which makes them easy to recognize.

Fuse boxes

A fuse box is not dangerous in itself when it is in good order and fused correctly. The problems come from what happens around it: a fuse replaced with a larger one so it stops blowing, too few circuits for the way the house is used now, and wiring that has been extended over the years. Most fuse boxes also have far less capacity than a modern home asks of them.

Split-bus panels

Some older panels have no single main breaker. Instead, several large breakers at the top together shut off the house. That layout is harder to shut down in a hurry, and these panels often have little room left for new circuits.

If your old electrical panel is not on this list, that does not mean it is in good shape. Corrosion, heat damage and amateur additions can make any panel unsafe.

What the concern actually is

A breaker has one job: to cut the power when a circuit draws more current than its wiring can safely carry. If it does that, an overloaded extension cord or a shorted appliance trips the breaker and nothing worse happens. If it does not, the wire keeps heating up inside the wall.

Loose connections create the other risk. Where a breaker meets the bus bar, a poor connection resists the current, and resistance turns into heat. Heat loosens the connection further, and the cycle repeats. That is why scorch marks, a warm panel cover or a burning smell are never something to wait on.

Signs worth calling about, whatever the brand:

• A panel cover or breaker that feels warm to the touch
• Scorch marks, melted plastic or a burning smell near the panel
• Breakers that trip often, or never trip even when something has clearly gone wrong
• Buzzing or crackling from the panel
• Rust or water stains inside the panel door
• Lights that dim or flicker when a large appliance starts

If you see scorch marks or smell burning, keep clear of the panel and get a licensed electrician to it.

Why your insurer may ask about it

Florida insurers often ask for a four-point inspection on older homes before they write or renew a policy. It covers the roof, the plumbing, the heating and cooling, and the electrical system. The electrical part looks at the panel brand, its condition and the wiring.

Some insurers will not cover a home with a Federal Pacific or Zinsco panel, or a fuse box, until it has been replaced. Others may raise the premium or ask for an electrician’s report. Each insurer sets its own rules, so ask yours what it needs before you schedule any work. If you are buying an older home, the inspection report usually names the panel, and an old electrical panel flagged there is better dealt with before closing than after.

Replace or repair

With these panel types, the usual advice from electricians is replacement rather than repair. Replacement breakers for some of them are hard to find, and swapping individual breakers does not fix a worn bus bar or the design concerns.

A panel replacement is a permitted job in Florida. A licensed electrician pulls the permit, coordinates with the power company where the service has to be disconnected, replaces the panel and its breakers, and the work is inspected before it is closed out. It is also a chance to sort out other issues the electrician finds, such as missing grounding, crowded circuits or room for future additions. Financing is available for larger electrical work like this; ask about it when you call.

What an electrician looks at

When an electrician inspects an old electrical panel, the visit usually covers:

• The brand, type and condition of the panel and breakers
• The bus bar, for heat damage, corrosion or loose connections
• The size of the service and whether it suits the house
• The grounding and bonding
• The wiring entering the panel, including any aluminum branch wiring
• Signs of past amateur work or overheating

You get a plain explanation of what was found and what the electrician recommends. The decision on what to do and when is yours.

Getting it checked

If the label on your old electrical panel says Federal Pacific, Zinsco or Sylvania, or you have a fuse box, a professional opinion is worth having. One Call Home Pros connects you with a vetted, licensed, insured local electrician who works on panels every day. You pay One Call, and One Call pays the pro, so ask what the price covers before the work begins.